Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

Question

René Dienemann 2020-3-1

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回答： Walter Roberson 2020-3-1

Hello, I want to extract different profiles along the x-axis from gridded data, by using a for loop. But, I get this error (Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.), and I don´t know why?

This is my code:

an_names = {'1-1','1-2','1-3','2-1','5-1'}; % Names of profiles
yp = [20.91,27.16,12.16,37.66,7.91]; % y coordinates of these profile
for k=1:numel(yp)
     magpr(k,:) = sens2g(round(nvec,2)==yp(k),:); % sens2g are gridded data of magnetic measurements and nvec is the y vector of my field
end
xvec = evec;        % x vector of my field
figure (1)          % plotting these extracted data
plot(xvec,magpr)
legend(an_names)

Thanks for the help!

Best regards

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Answer 1

Walter Roberson 2020-3-1

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round(nvec,2)==yp(k) is matching more than one element at some point so you are getting a 2d array that you are trying to store into a vector location.