MATLAB: How do you format rotated text from clabel in MATLAB 2014b

clabelformatrotated

The output of this code:

[C,h] = contour(peaks(1000),'r-');
clabel(C,h,'Color','r');

has changed between 2013a and 2014b. The 2013b out put would update the label color, but the line quality is poor. The 2014b gives excellent line quality, but leaves the text label color as black.

MATLAB 2013a

MATLAB 2014b

The help for 2014b says text formatting cannot be done if h is passed to clabel. However, it also (seemingly) gives no option for rotated labels if h is not passed. For example,

MATLAB 2014b with colors labels

[C,h] = contour(peaks(1000),'r-');
clabel(C,'Color','r');

Also, in 2014b clabel returns no output (handle) if h is not given as an argument. So I can't even access the handle to change formatting. I'm lost.

How can I have rotated colored labels for contours in MATLAB 2014b?

Thanks so much for help!

Best Answer

Sorry this took a while to get answered. I have checked with our developers to confirm and this is a known incompatibility going into R2014b. We understand the frustration when capabilities disappear. We can say that improvements to clabel are being actively discussed and this is a use case of concern to us.

Related Solutions

MATLAB: How to label a contour plot in the same colors as the contour lines

There is no need to use Java, just to use the two hidden (undocumented/unsupported) properties TextPrims (the text label handles) and EdgePrims (the contour line handles), as shown below. For additional info on customizing the contour labels/lines/faces read https://undocumentedmatlab.com/blog/customizing-contour-plots

% Create a simple contour plot
x = -2:0.2:2;
y = -2:0.2:3;
[X,Y] = meshgrid(x,y);
Z = X.*exp(-X.^2-Y.^2);
[C,hContour] = contour(X,Y,Z, 'ShowText','on');
% Update the text label colors
levels = hContour.LevelList;
labels = hContour.TextPrims;  % undocumented/unsupported

lines  = hContour.EdgePrims;  % undocumented/unsupported
for idx = 1 : numel(labels)
   labelValue = str2num(labels(idx).String);
   lineIdx = find(abs(levels-labelValue)<3*eps, 1); %avoid FP errors using eps
   labels(idx).ColorData = lines(lineIdx).ColorData;
end

MATLAB: How to alter contour label properties

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.

Best Answer

Related Solutions

MATLAB: How to label a contour plot in the same colors as the contour lines

MATLAB: How to alter contour label properties

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