MATLAB: How to adjust the radius of a pie chart

MATLAB

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.

Best Answer

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

Related Solutions

MATLAB: How to have multiple plots in a figure with preset height and compact spacing

In order to have multiple plots with compact spacing and preset height, you can have separate axes objects in the same figure and set their positions as required. Please take a look at the example below which illustrates this. Here, instead of having a tiled chart layout or subplot, two separate axes objects are created and their positions are specified explicitly.

f = figure();
ax1 = axes(f);
ax2 = axes(f);
ax1.Units = 'centimeters';
ax2.Units = 'centimeters';
axHeight = 3;
ax1.Position(4) = axHeight;
ax2.Position(4) = axHeight;
plot(ax2,1:10,1:10);
plot(ax1,1:20,1:20);
spacing = 0.3;%change this to obtain compactness
% position ax2 above ax1 with some spacing. using TightInset will account for any axes labels.
ax2.Position(2) = ax1.Position(2) + ax1.Position(4) + ax1.TightInset(4) + ax2.TightInset(2) + spacing ;

MATLAB: Can I create a straight-line default transition using the Stateflow API

The ability to draw a straight-line default transition using the external Stateflow API is not available in Stateflow.

To work around this issue, you can use the internal Stateflow API. Be aware, however, that using the internal Stateflow API is not supported, and the syntax can change in a future release of Stateflow.

Here is an example of how you can create a vertical straight-line default transition to a junction in Stateflow:

sfnew
rt = sfroot;
m = rt.find('-isa','Stateflow.Machine');
chart = m.findDeep('Chart');
junct = Stateflow.Junction(chart);
junct.Position.Center = [100 100];
dt = Stateflow.Transition(chart);
dt.Destination = junct;
dt.DrawStyle = 'SMART';
dt.SourceEndPoint = [100 100 - (junct.Position.Radius + 30)];
dt.DestinationOClock = 0;
sf('set',dt.id,'transition.src.intersection.direction',[0 0])

Best Answer

Related Solutions

MATLAB: How to have multiple plots in a figure with preset height and compact spacing

MATLAB: Can I create a straight-line default transition using the Stateflow API

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