mesh from 1D (creating a matrix from a vector)

2012 11 1
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Hello,
I have a vector A[-3:0.003:3] and a vector B whose values corresponding to those of A. I plotted B as a function of A ( it shows a curve like a gaussian). I would like now to plot in 3D using mesh. From vector A, i have to use two vectors x and y and I have to find a matrix from vector B.
Any help and I thank you in advance!
Adam

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Matt J
Matt J 2012-11-1

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Sounds like MESHGRID or NDGRID is what you want.

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adam
adam 2012-11-1
编辑：adam 2012-11-1
Thank you! yes to create x and y , we can use ndgrid [x y]=ndgrid([A]) But I don't know why do I create a matrix from the vector B, whose the values corresponding to the vectors x and y
I hope that my question is clear
Thank you
Matt J
Matt J 2012-11-1
Well, that depends on the functional form of B. The general benefit of ndgrid/meshgrid, however, is that you can now do element-wise operations involving x and y to generate B:
B=x.^2+y.^2;
mesh(x,y,B);
adam
adam 2012-11-2
Hello, Thank you for your answer. But you didn't understand my question.
- I create two vectors x and y from the vector A provided that A=x.^2+y.^2.
- I have to create a matrix C from the vector B.
In this case i can plot mesh(x,y,C)
Thank you!
Matt J
Matt J 2012-11-2
Hello, Thank you for your answer. But you didn't understand my question.
Still don't...

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adam
adam
2012-11-1

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