Types of Bar Graphs
MATLAB has four specialized functions that display bar graphs. These functions display 2- and 3-D bar graphs, and vertical and horizontal bar graphs.
Grouped Bar Graph
By default, a bar graph represents each element in a matrix as one bar. Bars in a 2-D bar graph, created by the
bar function, are distributed along the x-axis with each element in a column drawn at a different location. All elements in a row are clustered around the same location on the x-axis.
For example, define
Y as a simple matrix and issue the
bar statement in its simplest form.
The bars are clustered together by rows and evenly distributed along the x-axis.
Detached 3-D Bars
bar3 function, in its simplest form, draws each element as a separate 3-D block, with the elements of each column distributed along the y-axis. Bars that represent elements in the first column of the matrix are centered at
1 along the x-axis. Bars that represent elements in the last column of the matrix are centered at
size(Y,2) along the x-axis. For example,
displays five groups of three bars along the y-axis. Notice that larger bars obscure
bar3 draws detached bars. The statement
bar3(Y,'detach') has the same effect.
Labeling the Graph. To add axes labels and x tick marks to this bar graph, use the statements
Grouped 3-D Bars
Cluster the bars from each row beside each other by specifying the argument
'group'. For example,
groups the bars according to row and distributes the clusters evenly along the y-axis.
|Bar and Area Graphs||Stacked Bar Graphs to Show Contributing Amounts|
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