compensate vector into same length

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mingcheng nie
mingcheng nie 2022-12-31
评论： mingcheng nie 2023-1-3
if we have multiple vectors, A,B,C. Each of them has different length. How can we compensate them by NaN into same length and store them as a matrix.

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Stephen23
Stephen23 2022-12-31
The simplest approach is to download the function PADCAT() here:
https://www.mathworks.com/matlabcentral/fileexchange/22909-padcat
and use it like this:
M = padcat(A,B,C)
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Stephen23
Stephen23 2022-12-31
编辑：Stephen23 2022-12-31
"For example, I have a loop for 4 times, within each loop I will get a vector, then I need to compensate the vector with NaN within that loop; then in next loop I will have new vector to compensate."
How will you know what length to pad to, if you do not have all of the vectors?
I suspect that you could simply store all of the vectors in a cell array, and then supply them to PADCAT after the loop. This would likely be the simplest approach:
N = 4;
C = cell(1,N); % preallocate!
for k = 1:N
V = your code that generates a vector;
C{k} = V;
end
M = padcat(C{:})
mingcheng nie
mingcheng nie 2023-1-3
Yes you are right and your solution is the straightforward and simple!!! Thanks Stephen, it really helps me!!!!

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