在Matlab 2016b中使用颜色图为饼图的切片着色

Question

This seems like it should be a lot easier than it is...

In matlab 2016b, I want to use a colormap to color the slices of a pie chart.

My data are three element vectors and might contain a zero. I have three colors in my colormap that need to be used in the order of the vector data.

For example:

data = [1 0 1];
my_cols = [1.0000 0.8398 0; 0.8594 0.0781 0.2344; 0.2539 0.4102 0.8789];
labels = {'','',''};
p = pie(data,labels);
p.Patch = my_cols;

I have tried all sorts of ways that have been previously suggested but it seems to not work with version 2016b.

Note that I need the first element of my data to always correspond to the first color in my colormap. I think Matlab colors slices based on size, but I don't want this.

Answer 1

I do not have 16b at hand. The following was done in 17a:

data = [1 0.5 1];
my_cols = [1.0000 0.8398 0; 0.8594 0.0781 0.2344; 0.2539 0.4102 0.8789];
labels = {'','',''};
p = pie(data,labels);
p(1).FaceColor = my_cols(1,:);
p(3).FaceColor = my_cols(2,:);
p(5).FaceColor = my_cols(3,:);

Explanation: pie returns 2 elements for each slice, the patch object and the corresponding string object. You must set the color for the patch objects, ie in your case p(1) , p(3) , and p(5) .

Note that I changed your data input. With the zero in the vector you will get a warning and your variable dimensions are off.