Plot 3D matrix

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James
James 2018-11-6
评论： madhan ravi 2018-11-9
I have a 3D matrix containing values of potential between two charges for every x,y and z value so that I can find out the potential at any point by inputting three coordinates. The problem I'm having is I am unable to plot a 3D surface plot showing the potential.
I try and use surf() but the error says the value must be scalar, vector or numerical. I do have 2 inf values where the two charges lie, is this whats causing the problem and if so how do I get around it?
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Jan
Jan 2018-11-9
If you mention, that you get an error, please post a copy of the complete message. It is not possible that there is "another error", because Matlab stops at the first error already. "saying data dimensions dont agree" is less useful than a copy of the message, because then the readers do not have to guess in which line the error occurs.
Please post the relevant part of the code and a copy of the error message.
James
James 2018-11-9
Error using surf (line 71) Data dimensions must agree.
Error in coursw (line 84) surf(X3,Y3,d)

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madhan ravi
madhan ravi 2018-11-9
编辑：madhan ravi 2018-11-9
load matlab.mat
[X3,Y3] = meshgrid((-4.5:0.1:4.5),(-4.5:0.1:4.5));
for i = 1:81
figure()
surf(X3,Y3,d(:,:,i)) %likewise 1 to 81
end
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James
James 2018-11-9
It produces 81 plots of what it should look like, but each of them change the surface shape very slightly.
madhan ravi
madhan ravi 2018-11-9
So there’s nothing wrong in it James because the data points vary in each page of d that’s why there is slight change nothing to worry about it

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