how to expand 2D array?
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Hi
I create an array with shape of (2, 4), now I'd like to expand the array by 2 times in rows and 2 times in columns so the shape of array will become (4, 8). The values in the original small array will be only copied into a big every 2 rows and every 2 columns. NaN will be used for other locations. For example:
Original array, the values are:
1 2 3 4
5 6 7 8
The new array will be:
1 NaN 2 NaN 3 NaN 4 NaN
NaN NaN NaN NaN NaN NaN NaN NaN
5 NaN 6 NaN 7 NaN 8 NaN
NaN NaN NaN NaN NaN NaN NaN NaN
Then, I'd like to do interpolation to fill NaN in the big array.
Anyone has ideas? Thanks
1 个评论
David Hill
2021-3-12
Your final matrix is 2x16 not 4x8. Show us the final matrix with the interpolation done that you want.
采纳的回答
m = [1 2 3 4
5 6 7 8];
y = reshape([[m;nan(size(m))],nan(size(m,2))],2,[])
Version 2 after question was updated,
y = reshape([reshape([m(:),nan(size(m(:)))]',size(m,1)*2,[]); nan(size(m).*[2,1])],4,[])
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