Comparison of the Excel Lookup, Vlookup and Hlookup Functions
The Excel lookup functions - Lookup, Vlookup and Hlookup - are three of the most useful functions supplied by Excel. However, many users get these functions (particularly the Lookup and Vlookup functions) mixed up, and as a result, find that their function doesn't work as expected.
This article aims to clarify the difference between the Excel Lookup, Vlookup and Hlookup functions, and to provide an overview of each of these functions.
All three functions - the Lookup, Vlookup and Hlookup - look up a value in a list and return the corresponding value in a second list. However, each of the functions is designed to work slightly differently.
One of the main considerations when selecting a lookup function is whether your data is organised along rows (i.e. horizontally) or down columns (i.e. vertically). If organised horizontally, you can use either the Hlookup function or Lookup function, and if your data is organised vertically, you can use either the Vlookup function or the Lookup function.
It is also important to consider what you need to happen if the function fails to find an exact match to your lookup value. If you only want to return a value if an exact match is found, and if not, you want an error message to be returned, you will need to use the Vlookup or the Hlookup function (with the range_lookup argument set to FALSE). However, if you want to accept the closest match to your lookup value, any of the three lookup functions can be used to do this.
The three functions (including the two different forms of the Lookup function) are summarised below:
Lookup Function
Vector Form: The vector form of the Excel Lookup function uses two vectors (i.e. Two one-dimensional arrays). As these two vectors are supplied to the function as separate arguments they can be horizontal or vertical, and there are no limitations on their positions in relation to each other.
Array Form: The array form of the Excel Lookup function uses a 2-dimensional array. The first column or row of the array is searched for the lookup value and the value returned is taken from the last column or row. Therefore, this function relies on the data being organised in a table, and the column or row containing the values to be returned must after (but not necessarily adjacent to) the column or row being searched.
Both forms of the Lookup function search for a closest match. I.e. If an exact match to the lookup value is not found, the closest match below the lookup value is used instead.
Vlookup Function
The Excel Vlookup function uses a 2-dimensional array with the data organised in columns. The first column of the array is searched for the lookup value and the user specifies which column the value returned is to be taken from. Therefore, similar to the array form of the Lookup function, the column containing the values to be returned must be to the right of the column to be searched.
The main difference between the Vlookup function and the array form of the Lookup function is that the Vlookup function can be set (via the range_lookup argument) to only return a value if it finds an exact match. However, by default (i.e. If the range_lookup argument is not supplied) the Vlookup function will, like the Lookup function, return the closest match below the lookup value.
Hlookup Function
The Excel Hlookup is the horizontal version of the Vlookup function. The function uses a 2-dimensional array, with the data arranged in rows. The first row of the array is searched for the lookup value and the user specifies which row the value returned is to be taken from. Therefore, in the Hlookup function, the row containing the values to be returned must be below (but not necessarily adjacent to) the searched row.
Also, like the Vlookup function, the Hlookup function uses the range_lookup argument, which allows the user to specify how the function behaves if it fails to find an exact match. If this argument is set to FALSE, the Hlookup function only returns a value if it finds an exact match to the lookup value. However, by default (i.e. If the range_lookup argument is not supplied or is set to TRUE), the Hlookup function will return use the closest match below the lookup value.
It is important to note that in all of the above functions, if you are not requesting an exact match to your lookup value, the data in the column or row to be searched must be sorted into ascending order. If it isn't, this could cause your function to return unexpected results.
Comparison of the Excel Lookup, Vlookup and Hlookup Functions
Vector
Comparison of the Excel Lookup, Vlookup and Hlookup Functions
Comparison of the Excel Lookup, Vlookup and Hlookup Functions Comparison of the Excel Lookup, Vlookup and Hlookup Functions
Vector
Comparison of the Excel Lookup, Vlookup and Hlookup Functions
Comparison of the Excel Lookup, Vlookup and Hlookup Functions
In this paper I will explain many different routing protocols and give some
basic details and features about them. This paper in no way should be considered
a source of full detail about any of the listed protocols. For detailed
information about routing protocols I would suggest looking into the Request For
Comments (RFC) for that protocol, goggling them, or maybe visiting different
vendor's websites such as Cisco, Juniper, or Bay networks. Most vendors' web
sites have detailed explanations about all the Protocols there equipments
support features. Before you can understand routing protocol you will have to
have a basic understanding or IP networks, Variable Length Subnet Masks (VLSM),
Network Topologies (bus, star, Hub, etc..), and the OSI model. If you are not
familiar with any of the above subjects you may want to read up and learn about
them before moving into routing protocols. Routing protocols are what makes the
internet work by moving traffic from network to network. With out routing
protocols the internet could not work because networks would just be separate
LANs with no connection to others LANs. The internet in basic terms is just a
lot of LANs wired together to make a huge WAN.
Protocol types:
Distance Vector: distance vector routing is a type of
routing protocol that discovers routes on interconnected networks. The Distance
Vector routing algorithm is the based on the Bellman-Ford algorithm. Examples of
distance-vector routing protocols include RIP (Routing Information Protocol),
Cisco's IGRP (Internet Gateway Routing Protocol) try Google to see all the
different protocols in the Distance Vector family. Distance Vector protocols are
suitable for smaller networks as many of the protocols in this family aren't
scalable in lager complex networks as they are limited. The main limit to
Distance Vector Protocols is there method that requires each router simply
inform its neighbors of its routing table. This routing table update to other
members is bandwidth intensive to lager networks.
RIP (Routing Information Protocol):
Routing Information Protocol (RIP) is one of the first protocols to be used in
networking and is classified as a distance vector routing protocol. RIP uses
broadcast User Datagram Protocol (UDP) data packets to exchange routing
information. There are two versions RIP V1 & V2. RIP Version 1 is the original
version and has many limitations. The metric that RIP uses to rate the value of
different routes is hop count. The hop count metric works by assigning static
routes with a value of 0 and all other routers values are set by the number of
hops (up to 15) that the data must travel though to get to an end point. RIP
Version 2 supports plain text and MD5 authentication, route summarization,
classless inter-domain routing (CIDR), variable-length subnet masks (VLSMs),
Multicast support. Some vendors support other non-standard features for RIP but
be careful as many vendor centric features are not compatible in a mixed vendor
network.
IGRP (Inter Gateway Routing Protocol):
Interior Gateway Routing Protocol (IGRP) is a distance vector routing protocol
which is a proprietary and invented by Cisco. It is used by routers to exchange
routing data within an autonomous system (AS). IGRP supports multiple metrics
for routes, including bandwidth, load, delay and MTU. This improves reliability
over RIP because IGRP uses advanced metrics to compare two routes into a
combined route. The two routes together are combined into a single metric, using
a formula which can be adjusted via command line. The maximum hop count of IGRP
is 255 which is an improvement over RIPs 15 hop max. Keep in mind that IGRP is a
Cisco proprietary protocol and can not be used in a mixed vendor network.
Link State: Link State routing protocol requires each
router (peer) to maintain at least a partial map of the network. When a network
link changes state (up to down, or vice versa), a notification, called a link
state advertisement (LSA) is flooded throughout the network. All the routers
note the change, and recompute their routes accordingly. This method is more
reliable, easier to debug and less bandwidth-intensive than Distance-Vector. It
is also more complex and more compute- and memory-intensive. Link state routing
protocols are found in many lager networks and provide Scalable solutions for
more complex networks.
OSPF (Open Shortest Path First):
Open shortest path first (OSPF) is a link-state routing protocol that calls for
the sending of link-state advertisements (LSAs) to all other routers within the
same hierarchical area or autonomous system (AS). An AS can be divided into a
number of areas, which are groups of contiguous networks and attached hosts.
Information on attached interfaces, metrics used, and other variables are
included in OSPF LSAs. As OSPF routers accumulate link-state information, they
use the SPF algorithm to calculate the shortest path to each node.
Intermediate System-to-Intermediate System (IS-IS) is a routing protocol
developed by the ISO and is natively an ISO Connectionless Network Service or
CLNS protocol so it does not use IP to carry routing information messages. It
uses OSI protocols to deliver its packets and establish its adjacencies. IS-IS
has been enhanced to carry IP (Internet Protocol) and this is called Integrated
IS-IS. Integrated IS-IS supports VLSM and converges rapidly. It is also scalable
to support very large networks and is the key protocol in many larger ISP's.
Hybrid: Hybrid routing Protocols are a combination or
both Distance Vector and Link state protocols and only one protocol fits into
this field. EIGRP is Cisco Systems Proprietary protocol based on their original
IGRP. For more information on Hybrid Protocols look below to the section on "EIGRP".
EIGRP (Enhanced Inter Gateway Routing Protocol):
Enhanced Inter Gateway Routing Protocol (EIGRP) is Cisco Systems Proprietary
protocol based on their original IGRP. EIGRP is a balanced hybrid IP routing
protocol, with optimizations to minimize both the routing instability incurred
after topology changes, as well as the use of bandwidth and processing power in
the router. EIGRP has Protocol-Dependent Modules that can deal with AppleTalk
and IPX as well as IP. The advantage with this is that only one routing process
need run instead of a routing process for each of the protocols. EIGRP provides
loop-free operation and almost instant simultaneous synchronization of routers.
Inter-Autonomous System: Inter-Autonomous System routing protocols are designed
to connect lager networks or Autonomous Systems (AS) together and allow for
muitiple Autonomous Systems to network. One example for the need of an
inter-autonomous system protocol is to connect two or more Internet Service
Providers (ISP) together so there customer can connect to each other. Without
getting in to too much detail both "Link State & Distance Vector" protocols are
considered intra-autonomous system protocols as they are designed to just route
traffic in a singal AS. Inter-Autonomous System protocols main goal is to
propergate the intra-autonomous system information between different autonomous
systems.
BGP4 (Border Gateway Protocol Version 4):
Border Gateway Protocol is the backbone routing protocol for most of the
internet and allows for peering and carrier networks to connect. BGP is
explained as a path vector protocol. With BGP the policy or attributes for
making the actual route selections among the interconnected autonomous systems
is based on Weight ,Local preference, Multi-exit discriminator, Origin, AS path,
Next hop, & Community. BGP information is propagated through the network by
exchanges of BGP messages (4 types: Open, Update, Notification, & Keep Alive)
between peers. Another key feature to BGP is that is supports Classless Inter
Domain Routing (CIDR) with the support of CIDR BGP can reduce the size of the
Internet routing tables. BGP neighbors exchange full routing information when
the TCP (port 179) connection between neighbors is first established. When
changes to the routing table accrue, the BGP routers send to their neighbors
only those routes that have changed. BGP routers do not send periodic routing
updates and advertise only the optimal paths to a destination.
The purpose of routing protocols is to learn of available routes that exist on the enterprise network, build routing tables and make routing decisions. Some of the most common routing protocols include RIP, IGRP, EIGRP, OSPF, IS-IS and BGP. There are two primary routing protocol types although many different routing protocols defined with those two types. Link state and distance vector protocols comprise the primary types. Distance vector protocols advertise their routing table to all directly connected neighbors at regular frequent intervals using a lot of bandwidth and are slow to converge. When a route becomes unavailable, all router tables must be updated with that new information. The problem is with each router having to advertise that new information to its neighbors, it takes a long time for all routers to have a current accurate view of the network. Distance vector protocols use fixed length subnet masks which aren't scalable. Link state protocols advertise routing updates only when they occur which uses bandwidth more effectively. Routers don't advertise the routing table which makes convergence faster. The routing protocol will flood the network with link state advertisements to all neighbor routers per area in an attempt to converge the network with new route information. The incremental change is all that is advertised to all routers as a multicast LSA update. They use variable length subnet masks, which are scalable and use addressing more efficiently.
Interior Gateway Routing Protocol (IGRP)
Interior Gateway Routing Protocol is a distance vector routing protocol developed by Cisco systems for routing multiple protocols across small and medium sized Cisco networks. It is proprietary which requires that you use Cisco routers. This contrasts with IP RIP and IPX RIP, which are designed for multi-vendor networks. IGRP will route IP, IPX, Decnet and AppleTalk which makes it very versatile for clients running many different protocols. It is somewhat more scalable than RIP since it supports a hop count of 100, only advertises every 90 seconds and uses a composite of five different metrics to select a best path destination. Note that since IGRP advertises less frequently, it uses less bandwidth than RIP but converges much slower since it is 90 seconds before IGRP routers are aware of network topology changes. IGRP does recognize assignment of different autonomous systems and automatically summarizes at network class boundaries. As well there is the option to load balance traffic across equal or unequal metric cost paths.
Characteristics
• Distance Vector
• Routes IP, IPX, Decnet, Appletalk
• Routing Table Advertisements Every 90 Seconds
• Metric: Bandwidth, Delay, Reliability, Load, MTU Size
• Hop Count: 100
• Fixed Length Subnet Masks
• Summarization on Network Class Address
• Load Balancing Across 6 Equal or Unequal Cost Paths ( IOS 11.0 )
Enhanced Interior Gateway Routing Protocol is a hybrid routing protocol developed by Cisco systems for routing many protocols across an enterprise Cisco network. It has characteristics of both distance vector routing protocols and link state routing protocols. It is proprietary which requires that you use Cisco routers. EIGRP will route the same protocols that IGRP routes (IP, IPX, Decnet and Appletalk) and use the same composite metrics as IGRP to select a best path destination. As well there is the option to load balance traffic across equal or unequal metric cost paths. Summarization is automatic at a network class address however it can be configured to summarize at subnet boundaries as well. Redistribution between IGRP and EIGRP is automatic as well. There is support for a hop count of 255 and variable length subnet masks.
Convergence
Convergence with EIGRP is faster since it uses an algorithm called dual update algorithm or DUAL, which is run when a router detects that a particular route is unavailable. The router queries its neighbors looking for a feasible successor. That is defined as a neighbor with a least cost route to a particular destination that doesn't cause any routing loops. EIGRP will update its routing table with the new route and the associated metric. Route changes are advertised only to affected routers when changes occur. That utilizes bandwidth more efficiently than distance vector routing protocols.
Autonomous Systems
EIGRP does recognize assignment of different autonomous systems which are processes running under the same administrative routing domain. Assigning different autonomous system numbers isn't for defining a backbone such as with OSPF. With IGRP and EIGRP it is used to change route redistribution, filtering and summarization points.
Characteristics
• Advanced Distance Vector
• Routes IP, IPX, Decnet, Appletalk
• Routing Advertisements: Partial When Route Changes Occur
• Metrics: Bandwidth, Delay, Reliability, Load, MTU Size
• Hop Count: 255
• Variable Length Subnet Masks
• Summarization on Network Class Address or Subnet Boundary
• Load Balancing Across 6 Equal or Unequal Cost Paths (IOS 11.0)
• Hello Timer: 5 seconds on Ethernet / 60 seconds on Non-Broadcast
• Hold Timer: 15 seconds on Ethernet / 180 seconds on Non-Broadcast
• Metric Calculation = destination path minimum bandwidth x delay (msec) x 256
• Split Horizon
• LSA Multicast Address: 224.0.0.10
Open Shortest Path First (OSPF)
Open Shortest Path First is a true link state protocol developed as an open standard for routing IP across large multi-vendor networks. A link state protocol will send link state advertisements to all connected neighbors of the same area to communicate route information. Each OSPF enabled router, when started, will send hello packets to all directly connected OSPF routers. The hello packets contain information such as router timers, router ID and subnet mask. If the routers agree on the information they become OSPF neighbors. Once routers become neighbors they establish adjacencies by exchanging link state databases. Routers on point-to-point and point-to-multipoint links (as specified with the OSPF interface type setting) automatically establish adjacencies. Routers with OSPF interfaces configured as broadcast (Ethernet) and NBMA (Frame Relay) will use a designated router that establishes those adjacencies.
Areas
OSPF uses a hierarchy with assigned areas that connect to a core backbone of routers. Each area is defined by one or more routers that have established adjacencies. OSPF has defined backbone area 0, stub areas, not-so-stubby areas and totally stubby areas. Area 0 is built with a group of routers connected at a designated office or by WAN links across several offices. It is preferable to have all area 0 routers connected with a full mesh using an Ethernet segment at a core office. This provides for high performance and prevents partitioning of the area should a router connection fail. Area 0 is a transit area for all traffic from attached areas. Any inter-area traffic must route through area 0 first. Stub areas use a default route injected from the ABR to forward traffic destined for any external routes (LSA 5,7) to the area border router. Inter-area (LSA 3,4) and intra-area (LSA 1,2) routing is as usual. Totally stubby areas are a Cisco specification that uses a default route injected from the ABR for all inter-area and external routes. The totally stubby area doesn't send or receive external or inter-area LSA's. The not-so-stubby area ABR will advertise external routes with type 7 LSA. External routes aren't received at that area type. Inter-area and intra-area routing is as usual. OSPF defines internal routers, backbone routers, area border routers (ABR) and autonomous system boundary routers (ASBR). Internal routers are specific to one area. Area border routers have interfaces that are assigned to more than one area such as area 0 and area 10. An autonomous system boundary router has interfaces assigned to OSPF and a different routing protocol such as EIGRP or BGP. A virtual link is utilized when an area doesn't have a direct connection to area 0. A virtual link is established between an area border router for an area that isn't connected to area 0, and an area border router for an area that is connected to area 0. Area design involves considering geographical location of offices and traffic flows across the enterprise. It is important to be able to summarize addresses for many offices per area and minimize broadcast traffic.
Convergence
Fast convergence is accomplished with the SPF (Dijkstra) algorithm which determines a shortest path from source to destination. The routing table is built from running SPF which determines all routes from neighbor routers. Since each OSPF router has a copy of the topology database and routing table for its particular area, any route changes are detected faster than with distance vector protocols and alternate routes are determined.
Designated Router
Broadcast networks such as Ethernet and Non-Broadcast Multi Access networks such as Frame Relay have a designated router (DR) and a backup designated router (BDR) that are elected. Designated routers establish adjacencies with all routers on that network segment. This is to reduce broadcasts from all routers sending regular hello packets to its neighbors. The DR sends multicast packets to all routers that it has established adjacencies with. If the DR fails, it is the BDR that sends multicasts to specific routers. Each router is assigned a router ID, which is the highest assigned IP address on a working interface. OSPF uses the Router ID (RID) for all routing processes.
Characteristics
• Link State
• Routes IP
• Routing Advertisements: Partial When Route Changes Occur
• Metric: Composite Cost of each Router to Destination (100,000,000/interface speed)
• Hop Count: None (Limited by Network)
• Variable Length Subnet Masks
• Summarization on Network Class Address or Subnet Boundary
• Load Balancing Across 4 Equal Cost Paths
• Router Types: Internal, Backbone, ABR, ASBR
• Area Types: Backbone, Stubby, Not-So-Stubby, Totally Stubby
• Hello Timer Interval: 10 seconds for Ethernet / 30 seconds for Non-Broadcast
• Dead Timer Interval: 40 seconds for Ethernet / 120 seconds for Non-Broadcast
• LSA Multicast Address: 224.0.0.5 and 224.0.0.6 (DR/BDR) Don't Filter!
• Interface Types: Point to Point, Broadcast, Non-Broadcast, Point to Multipoint, Loopback
Integrated IS-IS
Integrated Intermediate System - Intermediate System routing protocol is a link state protocol similar to OSPF that is used with large enterprise and ISP customers. An intermediate system is a router and IS-IS is the routing protocol that routes packets between intermediate systems. IS-IS utilizes a link state database and runs the SPF Dijkstra algorithm to select shortest paths routes. Neighbor routers on point to point and point to multipoint links establish adjacencies by sending hello packets and exchanging link state databases. IS-IS routers on broadcast and NBMA networks select a designated router that establishes adjacencies with all neighbor routers on that network. The designated router and each neighbor router will establish an adjacency with all neighbor routers by multicasting link state advertisements to the network itself. That is different from OSPF, which establishes adjacencies between the DR and each neighbor router only. IS-IS uses a hierarchical area structure with level 1 and level 2 router types. Level 1 routers are similar to OSPF intra-area routers, which have no direct connections outside of its area. Level 2 routers comprise the backbone area which connects different areas similar to OSPF area 0. With IS-IS a router can be an L1/L2 router which is like an OSPF area border router (ABR) which has connections with its area and the backbone area. The difference with IS-IS is that the links between routers comprise the area borders and not the router.
Each IS-IS router must have an assigned address that is unique for that routing domain. An address format is used which is comprised of an area ID and a system ID. The area ID is the assigned area number and the system ID is a MAC address from one of the router interfaces. There is support for variable length subnet masks, which is standard with all link state protocols. Note that IS-IS assigns the routing process to an interface instead of a network.
Characteristics
• Link State
• Routes IP, CLNS
• Routing Advertisements: Partial When Routing Changes Occur
• Metric: Variable Cost (default cost 10 assigned to each interface)
• Hop Count: None (limited by network)
• Variable Length Subnet Masks
• Summarization on Network Class Address or Subnet Boundary
• Load Balancing Across 6 Equal Cost Paths
• Hello Timer Interval: 10 seconds
• Dead Timer Interval: 30 seconds
• Area Types: Hierarchical Topology similar to OSPF
• Router Types: Level 1 and Level 2
• LSP Types: Internal L1 and L2, External L2
• Designated Router Election, No BDR
Border Gateway Protocol (BGP)
Border Gateway Protocol is an exterior gateway protocol, which is different from the interior gateway protocols discussed so far. The distinction is important since the term autonomous system is used somewhat differently with protocols such as EIGRP than it is with BGP. Exterior gateway protocols such as BGP route between autonomous systems, which are assigned a particular AS number. AS numbers can be assigned to an office with one or several BGP routers. The BGP routing table is comprised of destination IP addresses, an associated AS-Path to reach that destination and a next hop router address. The AS-Path is a collection of AS numbers that represent each office involved with routing packets. Contrast that with EIGRP, which uses autonomous systems as well. The difference is their autonomous systems refer to a logical grouping of routers within the same administrative system. An EIGRP network can configure many autonomous systems. They are all managed by the company for defining route summarization, redistribution and filtering. BGP is utilized a lot by Internet Service Providers (ISP) and large enterprise companies that have dual homed internet connections with single or dual routers homed to the same or different Internet Service Providers. BGP will route packets across an ISP network, which is a separate routing domain that is managed by them. The ISP has its own assigned AS number, which is assigned by InterNIC. New customers can either request an AS assignment for their office from the ISP or InterNIC. A unique AS number assignment is required for customers when they connect using BGP. There are 10 defined attributes that have a particular order or sequence, which BGP utilizes as metrics to determine the best path to a destination. Companies with only one circuit connection to an ISP will implement a default route at their router, which forwards any packets that are destined for an external network. BGP routers will redistribute routing information (peering) with all IGP routers on the network (EIGRP, RIP, OSPF etc) which involve exchange of full routing tables. Once that is finished, incremental updates are sent with topology changes. The BGP default keepalive timer is 60 seconds while the hold timer is 180 seconds. Each BGP router can be configured to filter routing broadcasts with route maps instead of sending/receiving the entire internet routing table.
Often the question arises: what should be used raster of vector format? We hope the following comparison between the two systems gives you some common information about this question.
Raster - image formed as a sum of pixels. At present it is a dominating method of resulted presentation of graphic information (on raster displays and printers). Also it is used a close notion of bit map (bitmap) - raster saved on memory or disk. The raster image feature is in fact that size of uncompressed file and consequently the loading rate are independent of image complexity. The advantage of raster is a simple method and therefore rapid way of the image bit plane representation on the raster imaging devices or viewers. The limitation of this type of image is in fact that it can't be intentionally scaled because the decreasing of image size may lead to loss of some pixel rows, but increasing accompanied with enlargement of pixel sizes. Raster type of image is useful for pictorial graphics storage, at the same time quite effective shrinking algorithms have been developed for storage of raster data.
Vector - image formed with aid of separate lines, straight or curved. Quality of vector imaging is due to an accuracy output (it is demanded the devices supported vector imaging plotters or vector displays) and nomenclature of supported basic graphic primitives (lines, arches, curves, ellipses, etc.). The main advantage of vector graphic is a scaling convenience with possibility of working on the details of elements of different sizes on the one image. Besides, the advantage of vector graphic is in the fact that a form, spatial location and color of objects describe by mathematical formulas. It provides comparatively small sizes of image file and independence of resolution of print device or display. For representation of vector image it is usually demanded quite complicated software that understands and correctly carries out all nontrivial protocols of drawing commands saved in file of vector graphic format. At the same time the more complicate image is the larger size of respective file and the longer time the image drawing takes.
Vector image has a range of advantages over raster drawing. The main advantages are:
possibility of accurate creating and description of object;
possibility of scaling and editing of object without loss the image quality. Vectorisation - conversion from raster image to vector representation. In the most cases this operation involves loss of information about separate image elements which the program can't correctly describe (mainly quantity of curves is intentionally minimized). Respectively reverse operation is raterisation. Technically this operation is simpler than vectorisation, but we lose possibility of intentional scaling of created image.
Comparison Between Raster and Vector
Vector
Comparison Between Raster and Vector
Comparison Between Raster and Vector Comparison Between Raster and Vector
Vector
Comparison Between Raster and Vector
Comparison Between Raster and Vector
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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)
Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)
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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)
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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)
Illustrations Have Great Importance in Children's Books
The essence of illustration is highly found in children's books. Children always welcome the art of imagination to written texts. They are always attracted t the world of colors and visual fascinations that comes in the form of cartoon and comic illustrations.
Illustrations do not have its existence alone but they are created to complement any piece of writing to provide a better understanding and clear idea of what is delivered through the contents, whether they come in the form of bedtime stories or funny children's movies. The illustration is actually the literature itself as the drawings created are directly focused on the idea of the literature provided. Whether they come in the form of funny cartoon characters or depict a historical event, children are taken to a world of imagination where they feel like their favorite characters are given new faces and emotions. Children have a better perception of the story when they go through the illustrations and will get to know the emotions and moods of the characters by the very glance itself. Thus, it saves the time for reading and the effort for understanding things better. They can develop their sense of imagination and observation quickly which aid the overall mental development of the children.
Since small children always require another person, especially their mother to read the stories for them, the cartoon illustrations can be easily understood by them without getting the help of any other. This will give them a power of self-confidence and self-dependability. They will love to acquire knowledge about the cultural and historical heritage easily through cartoon illustrations. Cartoon illustrations are also the best place for them to enjoy humorous situations in their life. It will help in developing the reading habit of children without any pressure. Since a child is always sensitive to colorful pictures, they can understand thing even before they start speaking. They can identify persons easily and can enhance the ability to turn pages. They can also get to know different colors and the color of the objects. Thus, book illustration offers a wonderful way for pre-school children to develop their communicative and cognitive functions. Accurate and perfectly illustrated images can thus have good effect on the development stage of a child.
Illustrations Have Great Importance in Children's Books
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Illustrations Have Great Importance in Children's Books
Illustrations Have Great Importance in Children's Books Illustrations Have Great Importance in Children's Books
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Illustrations Have Great Importance in Children's Books
Illustrations Have Great Importance in Children's Books
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Puppies vs Cat
Puppies vs Cat
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Puppies vs Cat
Lots of cute white puppies "suffocating" a cat which tries to escape them
Puppies vs Cat
Illustrations Have Great Importance in Children's Books
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