Matlab:明确指定饼图切片颜色 [英] Matlab: Explicitly specifying pie graph slice color

问题描述

我正在创建一个饼图.

pie([a,b,c,d]);

是否可以显式更改各个切片的颜色?

Is it possible to explicitly change the color of the individual slices?

例如；如果我希望a和b的切片始终为绿色，而c和d的切片始终为蓝色，而不管它们的大小如何，我该怎么做?在我看来，彩色图使用切片的大小来着色，而不一定是赋予饼图功能的顺序.

For example; if I wanted the slices for a and b to always be green and c and d to always be blue, regardless of their size, how would I do that? It seems to me that a color map shades using the size of the slice not necessarily the order in which it was given to the pie function.

推荐答案

饼图的颜色由轴颜色图确定.因此，定义一个矩阵，该矩阵的行数与饼形图的数量一样多，并将其用作颜色图.第一种颜色是指第一个值(a)，等等.

The colors of the pie are determined by the axis colormap. So define a matrix with as many rows as the number of pie wedges, and use that as colormap. The first color refers to the first value (a), etc.

例如:

pie([3 2 4 1])
colormap([1 0 0;      %// red
          0 1 0;      %// green
          0 0 1;      %// blue
          .5 .5 .5])  %// grey

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