Explanation of surf plot

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Louise Wilson
Louise Wilson 2023-7-28
编辑： Cris LaPierre 2023-7-28
Ran in:
I used the following code to plot some example data:
A(1,1:51)=0:1:50;
A(2,2:51)=1;
A(3,2:51)=2;
A(4,2:51)=3;
A(5,2:51)=4;
A(6,2:51)=5;
A(7,2:51)=6;
A(8,2:51)=7;
A(9,2:51)=8;
A(10,2:51)=9;
A(1:10,1)=[0 1 2 3 4 5 6 7 8 9];
f=A(1,2:51);
t=A(2:10,1);
d=(A(2:end,2:end))';
surf(t,f,d,'EdgeColor','none');
view(0,90)
xlim([0 10])
colorbar
I'd like to understand how I get the code to plot all of the data.
There are nine different values in matrix 'A', but only 1-8 are plotted. Why is that?
Thanks!
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Louise Wilson
Louise Wilson 2023-7-28
Sorry, but this doesn't help me... I can see how the variables are defined, but don't understand what is wrong about it.
Louise Wilson
Louise Wilson 2023-7-28
  • where x = 1, c = 1, which is what I desire - but for some reason, the final x data point (9) isn't plotted. I'd like to understand why that is, so I can remedy it.

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采纳的回答

Cris LaPierre
Cris LaPierre 2023-7-28
编辑：Cris LaPierre 2023-7-28
Ran in:
What if we simplify the code?
X = 0:9;
Y = 0:50;
A = ones(51,10) .* X;
surf(X,Y,A,'EdgeColor','none');
colorbar
surf colors the face between points. So if you have 10 point along x, there are 9 faces (0-1, 1-2, ..., 8-9).
  2 个评论
Joel Hottinger
Joel Hottinger 2023-7-28
Ran in:
I think the key here is the between the points line. This becomes very apparent if we have a 2x2 matrix:
a = [1,1;2,2];
surf(a)
view(2)
Louise Wilson
Louise Wilson 2023-7-28
Yup, I see now, thanks!

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