Plot 2d pressure field

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Thales
Thales 2014-6-6
评论： Thales 2014-6-10
I would like to plot a 2d pressure field, i.e., I have two vectors x, y and the pressure P on each point. I would like to plot a colored map for the pressure field.
I used the scatter function to do it (scatter(x,y,5,P)), but it plots only the points on the coordinates x,y, but the spacing is too large.
I tried to use other functions such as surf or mesh, but it won't work (size(P) must be [length(y),length(x)].
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Sara
Sara 2014-6-9
Try looking at the interp functions in matlab. Otherwise you can write your own bilinear interpolator
Thales
Thales 2014-6-10
Ok, thank you.

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回答（1 个）

Image Analyst
Image Analyst 2014-6-6
Try scatteredInterpolant() to make a solid 2D array out of the individual scattered points, then display with imshow() or image().
  2 个评论
Thales
Thales 2014-6-6
How do I do that? Never used imshow or image to plot something...
Image Analyst
Image Analyst 2014-6-6
imshow(yourImageArray, []); % Requires Image Processing Toolbox.
image(yourImageArray); % Does not require Image Processing Toolbox.

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