# Plotting a surface with scatter data

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Benjamin on 5 Nov 2018
Commented: Walter Roberson on 6 Nov 2018
I have density which is a 310x1 matrix. I have pressure which is a 310x41 matrix. Each column corresponds to a different temperature and each row from 1 to 310 just corresponds to the pressure at a given density in the density matrix.
The temperature is stored in temperature variable as a 1x41 matrix that goes from 100 to 300 in increments of 5 K. How can I plot this data as a surface?
If I try:
surfc(density,temperature,pressure)
I get that the data dimensions must agree.
I have my x-data, density as 310x1.
I have my y-data, temperature as 1x41
Then my z-data, pressure, is 310x41.
Why do the dimensions not agree?
I think I know the issue, but can I just tell MATLAB that x and y values do not change for each matrix? If I manually create every column with all the repetitive data it works. I am not sure if I am being clear here or not, but I imagine the way I am going about doing it is not the most efficient.

Matt J on 5 Nov 2018
[D,T]=meshgrid(density,temperature);
surf(D,T,pressure);
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Walter Roberson on 6 Nov 2018
Alternately,
surfc(density, temperature, pressure.')
The difference is in the implicit grid ordering. Remember that MATLAB normally treats the first dimension of a 2D array as corresponding to y coordinates.