imagesc from 1D array with coordinates and values

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Abhishek Saini
Abhishek Saini 2020-5-4
评论： darova 2020-5-4
Hi,
I have 3 vectors and I want to plot a 2D image using mesh/ imagesc/surf command. But How can I convert 1D array to 2D array with accurate coordinate points?
Let's assume, I have
x = [1, 2, 1.4, 2.6,8.9];
y = [8, 5, 6, 2, 8.4,3.5];
amplitude = [0.3, 0.5, 0.9, 1];
Attach is the data. where x = xx, y=yy and amplitude = C;
Thanks

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回答（1 个）

darova
darova 2020-5-4
Use griddata
  2 个评论
Abhishek Saini
Abhishek Saini 2020-5-4
My data has size of (300000x1) so I cannot use mesh grid. It will go out of memory.
I found the method.
scatter works for this.
pointsize = 2;
scatter(x,y,pointsize,amplitude);

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