How to plot contour map of x,y values with z as dependent variable?
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I have this data where my Z is is the dependent variable for corresponding x and y. I need to import the data from excel and plot a contour color map
Can someone help please?
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Star Strider
2021-8-16
If ‘M’ is the matrix in the image:
y = M(1,:)
x = M(:,1)
z = M(2:end, 2:end);
So for example:
M = [NaN 1 2 3 4 5; 10 rand(1,5); 11 rand(1,5); 12 rand(1,5); 13 rand(1,5); 14 rand(1,5)]
y = M(1,2:end)
x = M(2:end,1)
z = M(2:end, 2:end)
figure
contourf(x, y, z)
.
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Star Strider
2021-8-16
编辑:Star Strider
2021-8-16
My pleasure.
The matrix does not have to be square. However, the lengths of the vectors of ‘x’ and ‘y’ have to match the size of the matrix.
However, if you want me to help you with it, you need to provide it in a form I can works with. My version of MATLAB cannot run images of code or data, only the actual code or data.
EDIT — (16 Aug 2021 at 21:06)
Same idea, however with non-square matrix —
M = [NaN 1 2 3 4 5; 10 rand(1,5); 11 rand(1,5); 12 rand(1,5); 13 rand(1,5); 14 rand(1,5); 15 rand(1,5)]
y = M(1,2:end)
x = M(2:end,1)
z = M(2:end, 2:end)
figure
contourf(x, y, z.')
xlabel('x')
ylabel('y')
.
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