2d plot from 1d plot
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Hello all.
I have one vector as a function of x of length 1220 point and another vector as a function of y of length 1933 point. These points are arbitrary measure of my x and y distance respectively. I want to multiply them together to get a third vector of x and y, then I want to plot with x and y. Any help how can I do it will be appreciated.
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Star Strider
2016-11-26
0 个投票
‘Note that my x and y distance are different from each other.’
The interp1 function is your friend here.
6 个评论
omnia
2016-11-26
Star Strider
2016-11-26
It depends on how you want to ‘multiply’ them. You can certainly create a (1220 x 1933) matrix, but if you want to do element-wise multiplication, they have to have the same lengths. That is the reason I suggested interp1 as a way to equalise their lengths.
How you want to do that is your choice.
omnia
2016-11-26
Star Strider
2016-11-26
It depends on what you mean by ‘resolution’. In engineering, it’s frequently necessary to make compromises to accommodate the constraints of the problem.
If you want to multiply them using element-wise operation, the two vectors must both have the same number of elements.
As Walter Cronkite (a U.S. television presenter) used to say, ‘That’s the way it is.’
omnia
2016-11-27
let me describe the problem in better way. I have two field, one in x direction described over length w, and the other in y described over range h. I have two plots of them which I am attaching. What I want to do is multiply them together over the rectangle of area w*h. My question is how to multiply them?
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Star Strider
2016-11-27
I can’t suggest anything other than what I already posted. It seems to me that you are doing matrix multiplication, so that something like this is what you want:
m = w(:) * h(:)';
This will produce matrix ‘m’ that has ‘length(w)’ rows and ‘length(h)’ columns.
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2016-11-27
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