Getting error while plotting a 2d countour

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Rajanikanta Swain 2016-10-24

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关闭： MATLAB Answer Bot 2021-8-20

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...

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Alexandra Harkai 2016-10-25

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.

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Answer 1

Marc Jakobi 2016-10-25

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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.

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Rajanikanta Swain 2016-10-25

Thanks. This worked.... Please help me to with calling an array from GUI pannel in to the Pushbutton function. The comands like X=str2num(get(handles.edit8,'string')); X=str2double(get(handles.edit8,'string'));

they dont work. Like i enter X=[5,-5] in Gui Pannel and it calls in main prgram when i run the gui... Is there any command to handle these?

Thanks

Marc Jakobi 2016-10-25

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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];