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Getting error while plotting a 2d countour

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Rajanikanta Swain
Rajanikanta Swain on 24 Oct 2016
Closed: MATLAB Answer Bot on 20 Aug 2021
Getting error while plotting a 2d countour plot in my GUI pushbutton functin. Is there any differnce in gui contour and ordinary countur plot? Also how to enter a matrix as input in my gui front pannel... Please helpme...
  1 Comment
Alexandra Harkai
Alexandra Harkai on 25 Oct 2016
What is the error you're getting? What is it you're trying to plot? Without these it's quite hard to see where your issue is.

Answers (1)

Marc Jakobi
Marc Jakobi on 25 Oct 2016
In a GUI created in GUIDE, you may have to specify the axes in which to create the contour.
contour(handles.axesName, x, y, z, ...)
You can find/set the "axesName" in the Tag property of the axes.
  2 Comments
Marc Jakobi
Marc Jakobi on 25 Oct 2016
Glad I could help. Please accept my answer if it helped you.
str2num('X=[5,-5]')
will return an empty value and
str2double('X=[5,-5]')
will return NaN (Not a Number). This is because the string 'X=[5,-5]' is not a number. You will have to find a way to extract the numbers from the string 'X=[5,-5]', e. g.
Str = get(handles.edit8, 'String'); % returns the string 'X=[5,-5]'
i1 = strfind(Str, '[');
a = sscanf(Str(i1 + 1:end), '%g', 1);
i2 = strfind(Str, ',');
b = sscanf(Str(i2 + 1:end), '%g', 1);
X = [a, b];

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