Digitization and interpolation of contour map.

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E R SH RAJ Male 2016-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/268118-digitization-and-interpolation-of-contour-map

回答： Arnab Sen 2016-2-22

Attached contour map with a range X-AXIS=[123-131] & Y-AXIS=[33-43] needs to be digitized and interpolation for a 0.1 x 0.1 grid.

I used Webplotdigitizer(<http://arohatgi.info/WebPlotDigitizer/>) to get values at the known points and placed in excel sheet(Attached). Also i have attached the code which can interpolate these values and give me matrix of (100 x 80) [ 43-33/0.1=100 & [ 131-121/0.1=80] I am facing problem in interpolation ,as it give errors.So can anybody please look in code.

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John D'Errico 2016-2-15

I'm sorry, but this is not a "we write your code for you" service.

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Answer 1

Arnab Sen 2016-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/268118-digitization-and-interpolation-of-contour-map#answer_210710

This issue might be due to the fact that there were some change in all the 'interp' functions in MATLAB release R2013b. As a workaround, consider the in-built function 'griddedInterpolant' instead of 'interp2' to achieve the same goal.

For more details about 'griddedInterpolant', refer to the following link:

http://www.mathworks.com/help/matlab/ref/griddedinterpolant-class.html