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How to label the levels of a fcontour plot?

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TS
TS on 14 Apr 2017
Commented: Star Strider on 15 Apr 2017
How to label the levels of a fcontour plot? fcontour does not work with clabel nor has a option such as 'ShowText','on' in contour.

Accepted Answer

Star Strider
Star Strider on 14 Apr 2017
You must use the contour function to get the contour labels.
Combining fcontour and contour to get the result you want (in figure(2) here) is not difficult. You first need to get the data fcontour creates. You can do that by returning the handle to it, and then accessing its properties.
Using an example from the documentation for fcontour and adapting it to use contour:
syms f(x,y)
f(x,y) = sin(x) + cos(y);
figure(1)
hfc = fcontour(f);
figure(2)
contour(hfc.XData, hfc.YData, hfc.ZData, 'ShowText','on')
Although this takes one more line of code, it will give you the result you want.
  2 Comments
Star Strider
Star Strider on 15 Apr 2017
My pleasure.
The two functions have some significant differences. The outputs from fcontour are matrices, while the outputs from contour are the the vectors of (x,y) coordinates for each contour.

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