Change the position of a pie chart

Hi everyone,

I'd like to change the position of a pie chart from "Initial position" to "Final position" (see figure below).

Can anyone help me?

Thank you.

Alessia

Answer 1

[Mathieu NOE]

hello

try this

X = [0.1 0.2 0.2];
subplot(1,2,1),
pie(X);

subplot(1,2,2),
pie(X);
set(gca, 'CameraViewAngleMode', 'manual', 'CameraTargetMode', 'manual', ...
         'CameraPositionMode', 'manual');
     
ang = 3*pi/2;     
  set(gca, 'CameraUpVector', [sin(ang), cos(ang), 0]);

[Alessia Giorgi]

Thank you very much!!!

[Mathieu NOE]

My pleasure !

If my submission fullfills your request, do you mind accepting it ?

tx

[Mathieu NOE]

hello again

If my submission fullfills your request, do you mind accepting it ?

tx

Answer 2

[Adam Danz]

The solution below rotates the set of objects that create a pie chart by using an hgtransform.

The text label alignment needs updated since the initial alignment is designed to be to the left of the pie segments but after rotation, the labels should be centered above the segments. The text alignment adjustment is fairly easy for this example but if the pie chart contained all segements around the circle, a bit more work would be needed to assign the best alignment property values.

% Create initial pie chart
ax = axes(); 
h = pie([.167 .167 .167]); 

% rotate 90 deg clockwise
ang = -90;  % angle of rotation, degrees, negative is clockwise
tform = hgtransform('Parent',ax); 
set(h, 'Parent', tform)
Rz = makehgtform('zrotate',ang*pi/180); 
set(tform,'Matrix',Rz)

% Adjust text label alignment
tobj = findobj(h,'type','text'); 
set(tobj, 'VerticalAlignment', 'Bottom', 'HorizontalAlignment', 'Center')