How to change the font of a pie chart?

I want to change the font of pie chart in this code. However, I could not change. Thank you!

width = 6;     % Width in inches
height = 3;    % Height in inches
alw = 0.75;    % AxesLineWidth
fsz = 14;      % Fontsize
lw = 1.5;      % LineWidth
msz = 8;       % MarkerSize
legl1=5;      % legen length size
legl2=5;       % legen length size
LOC='northwest'; % location of legend

%fig = figure; clf
close all

%% Vs=340 Rl=200
figure (1)
subplot(1,2,1)
hold on
X1 = categorical({'S_1','S_2','L_p','L_r','C_{link}','D'});
X1 = reordercats(X1,{'S_1','S_2','L_p','L_r','C_{link}','D'});
X= [0.16 0.093  0.25 ; 0.06 0.125 0.185; 0 2.44 2.44 ; 0 1.8 1.8 ; 0 3.5 3.5 ;  0 1.6 1.6  ];
bar(X1,X);
%title('Second Subplot','fontName','Times')
ylabel('Power losses (W)','fontName','times','FontSize',20);
%xlabel('f_s/f_0','fontName','Time new Roman','FontSize',20);
pos = get(gcf, 'Position');
leg=legend('Switching Loss' ,'Conduction Loss','Total Loss','boxoff','Location',LOC);
leg.ItemTokenSize = [legl1,legl2];
set(gcf, 'Position', [pos(1) pos(2) width*100, height*100]); %<- Set size
set(gca, 'FontSize', fsz, 'LineWidth', alw,'fontname','times'); %<- Set propertieslegend('Conduction Loss','Switching Loss','Total Loss','fontName','Time new Roman');
ylim([0 4])
hold off

b2=subplot(2,2,2);
X1= [(2.1*100/7.3)  (3.5*100/7.3) (3*100/7.3) ];
explode = {'Inverter(28%)','Resonant tank(48%)','Rectifier (24%)'};
pie(X1,explode);
hold on
set(gcf, 'Position', [pos(1) pos(2) width*100, height*100]); %<- Set size
set(gca,'fontName','times', 'FontSize', fsz, 'LineWidth', alw); %<- Set properties
dx0 = -0.06;
dy0 = -0.4;
dwithx = 0.1;
dwithy = 0.23;
set(b2,'position',get(b2,'position')+[dx0,dy0,dwithx,dwithy],'fontName','times')
set(gca,'LooseInset', max(get(gca,'TightInset'), 0.08),'fontName','times')
hold off

Answer 1

[Steve Eddins]

The text labels created by the pie function are not controlled by the font properties of the containing axes object. They are independent text objects with their own font-related properties. You can find those pie-chart text objects using findobj and set their FontName properties directly. For the the last few lines of your script, try this:

set(b2,'position',get(b2,'position')+[dx0,dy0,dwithx,dwithy],'fontName','times')
set(findobj(b2,'type','text'),'FontName','times')  % THIS LINE ADDED
set(gca,'LooseInset', max(get(gca,'TightInset'), 0.08),'fontName','times')
hold off

Also, b2 (the output of subplot(2,2,2) above) is the same as gca here, so you can combine those two calls to set. I recommend calling set with b2 rather than gca, as clicking anywhere on a MATLAB figure window while this code is running can change what gca returns, producing unexpected results.

[Tin Truong Chanh]

Thank you so much for your help!. Your code works well.

[Giuseppe Degan Di Dieco]

Dear Steve,

thank you so much, clear and easy to follow.

Best!

Answer 2

[Alan Stevens]

You can do it from the Property Inspector after the program has finished.

[Tin Truong Chanh]

Thank you!, Your way is also good way!