How to change the fontsize of labels not axsis.

I want to change the fontsize of labels of x and y.

But if I change the font size of the label, the size of the numerical value on the axis will also change.

Is there good way?

Theta_Theory = linspace(-3.14, -4.71, 100);   
Velocity_Theory = linspace(-100,0,100);       
x1 = sin(Theta_Theory);  
y1 = -cos(Theta_Theory); 
T =  sqrt(2*abs(y1)/9.8);  



z = x1 + abs(Velocity_Theory).*T.';  
z = -abs(z - target);         

x = Theta_Theory;    
y = Velocity_Theory;




minx = min(x);
maxx = max(x);
miny = min(y);
maxy = max(y);
meanValue = mean(z);
heatMapImage = meanValue  .* zeros(100,100);


for k = 1 :100
  column = round( (x(k) - minx) * 100 / (maxx-minx) ) + 1;  
  row = round( (y(k) - miny) * 100 / (maxy-miny) ) + 1;
  heatMapImage(row, column) = z(k);
end



figure(1)


hh = heatmap(x,y,z,'Fontname','Times New Roman','ColorbarVisible', 'on','GridVisible','off');
h = gca;
%.xlabel('Angular[rad]');
%h.ylabel('Angular Velocity[m]');


h.FontSize = 8; %　here is problem.
h.FontName = 'Times New Roman';
h.xlabel('Angular(rad)');
h.ylabel('AngularVelocity[m/s^2]');



colormap hot

Answer 1

[Voss]

Try replacing those four lines of code with the following:

h.FontName = 'Times New Roman';
h.XLabel.String = 'Angular(rad)';
h.YLabel.String = 'AngularVelocity[m/s^2]';
h.XLabel.FontSize = 8;
h.YLabel.FontSize = 8;

[ryunosuke tazawa]

The error happed.

Dot indexes are not supported for variables of this type and assignments cannot be made.

Should I do?

[Voss]

make sure h is still your axes when those lines run

Answer 2

[Jan]

h = gca;

h.FontSize = 8; %　here is problem.

This changes the font size of the complete axes object. If you want to change the font size of the x-label only, do not touch the font size of the axes, but of the XLabel:

axesH = axes;
plot(axesH, 1:10);
axesH.XLabel.String   = 'X label';
axesH.XLabel.FontSize = 20;