How do I adjust the radius of a pie chart?

I would like to specify the radius of a pie chart relative to the figure window.

Currently if the figure window is re-sized with the mouse the pie chart within automatically adjusts to fill the window.

Answer 1

[MathWorks Support Team]

The ability to specify the radius of a pie chart is not available in MATLAB.

As a workaround, you can adjust the size and position of the axis containing the pie chart and get a similar effect. The code below demonstrates how this can be done.

close all; clc;

pieData = [10 20 30 40 50];     % Size of pie slices 

pieHandle = pie(pieData);       % Get vector of handles to graphics objects

pieAxis = get(pieHandle(1), 'Parent');  

pieAxisPosition = get(pieAxis, 'Position');

newRadius = 0.50;   % Change the radius of the pie chart

deltaXpos = 0.2;    % Move axis position left or right

deltaYpos = 0.2;    % Move axis position up or down

hText = text(-1.7, -1.4, 'PRESS ANY KEY TO ADJUST THE RADIUS');

pause;

delete(hText);

% Compute newPieAxisPosition

% To keep the axis centered (Xpos, Ypos) also need to be adjusted.

% Position is a four-element vector: [left bottom width height]

% Translate (left, right) by (deltaXpos, deltaYpos) and Scale (width, height) by newRadius.

newPieAxisPosition = (pieAxisPosition + [deltaXpos deltaYpos 0 0]) .* [1 1 newRadius newRadius];

set(pieAxis, 'Position', newPieAxisPosition);     % Set pieAxis to new position