MATLAB: How to alter contour label properties

clabelcontourcontourf

How can I change contour label properties without getting the warning shown below?

[cc, hh] = contourf(peaks);
t = clabel(cc, hh); % This command generates the warning
t.FontWeight = 'bold'; % Does not produce bold font
Warning: Text handle output is not supported for managed labels. 
No public field FontWeight exists for class matlab.graphics.GraphicsPlaceholder.

(Can't find any reference to "managed labels" in documentation or clabel code.)

Best Answer

If you download and install one of the workarounds available here for R2014b or R2015a: http://www.mathworks.com/support/bugreports/1114747, you'll be able to use commands like the following to control the FontWeight of your labels:

clabel(C,h,'FontWeight','bold')

The workaround will enable a total of 12 properties that affect the appearance of contour labels: Color, FontName, FontSize, FontWeight, and 8 others.

Related Solutions

MATLAB: Findobj cannot find a TexBox (annotation) object

Try using the object handle (txb) directly.

plot(1:10)
str = 'Straight Line Plot from 1 to 10';
txb = annotation('textbox',[.2 .5 .3 .3],'String',str,'FitBoxToText','on');
●
% Use object handle
findobj(txb)
ans = 
  TextBox (Straight Line Plot from 1 to 10) with properties:

             String: 'Straight Line Plot from 1 to 10'
           FontName: 'Helvetica'
           FontSize: 10
         FontWeight: 'normal'
              Color: [0 0 0]
    BackgroundColor: 'none'
          EdgeColor: [0 0 0]
          LineStyle: '-'
          LineWidth: 0.5000
           Position: [0.2000 0.5000 0.3000 0.3000]
              Units: 'normalized'

  Show all properties

If you want to instead find the annotation without using the object handle, use findall instead.

findall(gcf,'Type','textboxshape')
ans = 
  TextBox (Straight Line Plot from 1 to 10) with properties:

             String: 'Straight Line Plot from 1 to 10'
           FontName: 'Helvetica'
           FontSize: 10
         FontWeight: 'normal'
              Color: [0 0 0]
    BackgroundColor: 'none'
          EdgeColor: [0 0 0]
          LineStyle: '-'
          LineWidth: 0.5000
           Position: [0.2000 0.5000 0.3000 0.3000]
              Units: 'normalized'

  Show all properties

MATLAB: About the font property

That is handled by the FontWeight property:

FontWeight
    {normal} | bold | light | demi
    Weight of text characters. MATLAB uses this property to select a font from those available on your particular system. Generally, setting this property to bold or demi causes MATLAB to use a bold font.

Best Answer

Related Solutions

MATLAB: Findobj cannot find a TexBox (annotation) object

MATLAB: About the font property

Related Question