## Gallery - Bars (vertical)

Welcome Gallery Handbook

Manual page for Gallery_-_Bars_(vertical)(PL)

This page contains a series of vertical bar graph examples illustrating the available varieties and options. These examples all use ploticus's proc bars, which renders bar graphs, error bars, and bar segments, in vertical or horizontal orientation.

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Example 1 - vbars prefab

vbars prefab
The vbars prefab is the easiest way to create basic bar graphs without writing any script code.

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Example 2 - stack prefab

stack prefab
The stack prefab creates stacked bar graphs of up to 4 levels.

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Example 3 - script

stock2
A stock price/volume display. The bars show low-high range for the day (segmentfields attribute), and have left tics to show opening price, and right tics to show closing price.

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Example 4 - script

mouse.p2
Histogram automatically generated from random data, fitted with a bspline curve.

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Example 5 - script

bars2
In this example, values less than zero result in red downward bars. The positive bars are done first using orange and then the negative bars are done using red. The values are displayed near the ends of the bars using the showvalues option.

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Example 6 - script

bars9
Another example of values less than zero.

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Example 7 - script

hitcount
A histogram example, which utilizes datetime scaling as well as some of ploticus's data filtering / processing features.

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Example 8 - script

bars3
Stacked bars. These show magnitude of several components as well as the sum of the components. proc bars is executed four times, first to render bars for Steve, then for Lisa, then for Rob, then for Takisha. The stackfield attribute indicates what data field(s) should be used to raise the bars. For a full-page version of this see vermonth. Note: stacking cannot be used when components are a mixture of positive and negative values.

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Example 9 - script

teens
Clustered bars. These allow components to be compared with each other, as well as across multiple instances, without regard to the sum of the components (if the sum of the components is of primary interest, a stacked layout probably should be used). proc bars is executed two times, first to render the pink bars, and then again to do the blue. The cluster attribute indicates the bars' position with clusters; for the red bars it is 1 / 3, for the blue it is 2 / 3, and for the orange it is 3 / 3.

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Example 10 - script

students
This example allows a variable number of datafields, and the number of bars per cluster (as well as the legend) follows the number of datafields on input.

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Example 11 - script

bars5a
Stacked, clustered bars. These may be useful in displaying multiple variables, groupings, and instances. proc bars is executed once for each color of bar, using the stackfield and cluster attributes to control position. bars5 is another example of stack clustered bars.

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Example 12 - script

propbars2
Here, the bar segments represent proportions of a whole. The stackfields attribute is used to position bars. See also propbars1, a horizontal example of proportional bars.

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Examples of bar labeling

bars6
Here, bar labels are formatted using the labelword attribute to show dollar amounts.

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bars7
Longwise labels, formatted to show dollar amounts.

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bars8
Individual components of a stacked bar graph labeled with values. Label position is adjusted downward so that label is within bar, and a lighter-colored backing box is used so that the labels are visible.
data display engine
Copyright Steve Grubb

Markup created by unroff 1.0, `` `` September 14, 2001.