Why doesn't clabel give me a white contour label when asked...?

Why doesn't this result in a white contour with a white label ? It has on all previous versions of matlab but I'm on 2015 now and something has changed (this is from a previously working script):

v=[slim slim];
[cs,h]=contour(xsub,ysub,drhom,v,'w--');
set(h,'LineWidth',2);
clabel(cs,h,'Color','w');

I get white contours and black labels....have tried every combination of things I can think of.

Answer 1

[Benjamin Kraus]

The behavior of the 'clabel' function changed a little in MATLAB R2014b. It is noted in the documentation (towards the bottom of the page):

"Note: Starting in R2014b, you can no longer set text properties if you pass the contour object h as an input argument to the function. For example, clabel(C,h,'Fontsize',14) does not set the font size. Use clabel(C,'FontSize',14) instead."

<http://www.mathworks.com/help/matlab/ref/clabel.html>

Try:

v=[slim slim];
[cs,h]=contour(xsub,ysub,drhom,v,'w--');
set(h,'LineWidth',2);
clabel(cs,'Color','w'); % Note that I removed "h"

If that doesn't work, a little more detail (with working code) might help. For example, what are the values of "slim", "xsub", "ysub" and "drhom", and why do you want a white contour with white labels?

Answer 2

[Lucy MacGregor]

Thanks for the answer, but I'd worked that out already. This doesn't give you a contour label that is equivalent to the original command clabel(cs,h,'Color','w'). It appears you can have either: 1) A white contour with a black label, neatly in line with the contour, but hard to read because it's black. 2) A white contour with a white label, but now the label is not inline with the contour but sticks out at a jaunty angle, again making it hard to read since it now crosses other contours in parts of the plot (depending on the plot in question - this affects many many scripts).

How do you get to the situation that worked perfectly well before: a neat white label, in line with a neat white contour. Or has this rather useful functionality just vanished ?

[GK]

Yes, I had this issue as well for version 2015a. I upgraded to 2015b and the name,value arguments work as I want them to (contour labels in line w/ modifiable features)

see: http://www.mathworks.com/help/matlab/ref/clabel.html

[Benjamin Kraus]

This issue was fixed in MATLAB R2015b. You can download patches for MATLAB R2014b and R2015a. For more information check the Bug Report