One optiono is to use the first column and first row as the appropriate coordinate vectors, and then the rest of the matrix as the array to use with contourf.
I am not certain what result you want.
One possibility —
Data = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1084750/data.xlsx')
xv = Data(1,2:end);
yv = Data(2:end,1).';
Cm = Data(2:end, 2:end);
figure
contourf(xv, yv, Cm)
colormap(jet)
colorbar
xlabel('X')
ylabel('Y')
EDIT — (1 Aug 2022 at 14:23)
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