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I want to plot a gride of pressure distribution in x and y direction
x=1:15;
y=1:15;
Pressure=Psave; (%matrix size (1125,1))

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Akira Agata
Akira Agata 2022-4-5
Question for clarification:
Why the matrix size of the variable Pressure becomes 1125, instead of 225 (=15 x 15) ?
sorry it is 225

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Voss
Voss 2022-4-6
Ran in:

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Ran in:
x = 1:15;
y = 1:15;
% some 225x1 Pressure values:
Pressure = reshape(5000-abs(2*x-y.'),[],1);
size(Pressure)
ans = 1×2
225 1
% reshape Pressure to numel(y)-by-numel(x), 15x15.
% your reshape might have to be different, depending on how the order of
% the elements in Pressure relates to x and y
surface(x,y,reshape(Pressure,numel(y),[]));
cb = colorbar();
xlabel('x')
ylabel('y')
ylabel(cb,'Pressure')
title('Pressure')
axis tight

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