MATLAB: How to make this pie chart

MATLABplotting

Hey all, I want to know is possible to have a pie chart with 5 pies so that I can change the color of each pie that I want? Just like this:

I don't have any data sets, in this case, I just want pie chart with 5 equal parts with ability to change colors.

Please let me know is this possible to do this in Matlab?

Best Regards.

Best Answer

One option:

p = pie(ones(1,5)); % create a pie chart with 5 equal slices
t = p(2:2:end); % get the handles to the text labels
p = p(1:2:end); % get the handles to the patches
delete(t) % delete the text labels
p(2).FaceColor = 'g'; % change the color of the second patch to green

Related Solutions

MATLAB: How can i change the colours of segmentation on a chart pie

Unforunately the pie() function does not allow you to directly specify the face color of each wedge as inputs.

Here are two ways to change the wedge colors after producing the pie plot.

Produce a demo pie chart & define colors

ax = gca(); 
pieData = [.3 .4 .3]; 
h = pie(ax, pieData); 
% Define 3 colors, one for each of the 3 wedges
newColors = [...
    1,       0.41016, 0.70313;   %hot pink
    0,       1,       0.49609;   %spring green
    0.59766, 0.19531, 0.79688];  %dark orchid

Option 1 : change the axes colormap

You can use on of Matlab's many pre-defined colormaps or you can create your own has we've done above. This works with pie() and pie3() objects.

% ax is the handle to the pie chart axes
% newColors is a nx3 matrix for n pie-wedges
ax.Colormap = newColors; 
% to use a pre-defined colormap (in this example, 'Spring')
% h is the output to pie()
ax.Colormap = spring(numel(h)/2);

Option 2: Change the FaceColor of the wedges

For pie() objects

% h=pie() output is a vector of alternating patch and text handles. 
% Isolate the patch handles
patchHand = findobj(h, 'Type', 'Patch'); 
% Set the color of all patches using the nx3 newColors matrix
set(patchHand, {'FaceColor'}, mat2cell(newColors, ones(size(newColors,1),1), 3))
% Or set the color of a single wedge
patchHand(2).FaceColor = 'r';

For pie3() objects

% Extract the surface and patch handles from the output to pie3()
surfaceHand = findobj(h, 'Type', 'Surface'); % edges
patchHand = findobj(h, 'Type', 'Patch');     % tops & bottoms
% Set the color all patches (tops & bottoms) and surfaces (edges) using the nx3 newColors matrix
set(surfaceHand, {'FaceColor'}, mat2cell(newColors, ones(size(newColors,1),1), 3));
set(patchHand, {'FaceColor'}, mat2cell(repelem(newColors,2,1), ones(size(newColors,1)*2,1), 3));

MATLAB: Is it possible to summarize this code

You could use a switch case structure, that would be a bit more compact.

it would look like this:

switch davar1.CC_CHECK
    case 'New York'
        p(1).FaceColor = 'g';
    case 'California'
        p(1).FaceColor = 'y';
    case 'Illinois'
        p(1).FaceColor = 'r';
    case 'Texas '
        p(1).FaceColor = 'k';
    case 'Ohio'
         p(1).FaceColor = 'b'; % powder pink
    case 'North Carolina'
        p(1).FaceColor = 'c';
    case 'Tennessee'
        p(1).FaceColor = 'w';
end

Best Answer

Related Solutions

MATLAB: How can i change the colours of segmentation on a chart pie

MATLAB: Is it possible to summarize this code

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