Sunday, June 3, 2012

Pie chart --- the simplest use of command "\psChart"

Command "\psChart" in package pstricks-add makes plot a pie chart very simple. The syntax of this command is "\psChart[options]{values1}{values2}{radius}". "values1" is the list of date to be plotted. "vaules2" is a list of outraged pieces. For example, if you want the 1st and 5-th sector to be outraged, you can specify this parameter as "{1,5}". "radius" is the radius of the pie chart. The color used to paint the num-th pie piece is named internally as "chartFillColornum".

Now let us have a try of this command.

    %Pie chart
    %The legends
    \uput[r](6.5,-4.75){Pie 1}
    \uput[r](6.5,-3.75){Pie 2}
    \uput[r](6.5,-2.75){Pie 3}
    \uput[r](6.5,-1.75){Pie 4}
    \uput[r](6.5,-0.75){Pie 5}
    \uput[r](6.5,0.25){Pie 6}

Fig.1 Pie chart plots in Pstricks

In the upper example, we see that a pie chart with radius "5" is plotted accroding to data "{1,2,2,3,1,4}", and the 1-st and 5-th pie pieces is outraged. This is exactly what we expected. And with the help of variable "chartFillColornum" we produced the legends.

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