How I can save vectors in for loops

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Sam sanati
Sam sanati 2015-5-3
评论： Star Strider 2015-5-3
Dears, I want to know how can I save vectors in 3(or more) for loops My code is huge and I summarize it here.
for i=1:10
for j=1:15
for k=1:20
% some calculation
Vector1= something with size(1x2000) % size of Vector1 will be changed in each loop
end
end
end
finally I would like to attach all of Vector1 to one vector and capable to find the special array is related to which i and j and k.

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Star Strider
Star Strider 2015-5-3
Since the length of the vector will change in each loop, I would use a cell array and a counter:
k1 = 0;
for i=1:10
for j=1:15
for k=1:20
% some calculation
k1 = k1 + 1;
Vector1{k1} = something with size(1x2000) % size of Vector1 will be changed in each loop
end
end
end
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Sam sanati
Sam sanati 2015-5-3
Thanks for your quick reply and apologize for bad explanation. There is 2 question:
1- how to concatenate vectors in for loops? The number of vectors is too much (for example n is 2000).
xc=[x1 x2 ... xn]
I can not concatenate after end of last for.
2- after creation of xc, the n th array of xc (for example 12567 th) should be determine the related i,j and k.
Thanks again
Star Strider
Star Strider 2015-5-3
My pleasure. Your explanation is not ‘bad’, sometimes it is not easy to describe what what we want our code to do.
If I understand you correctly:
1. The length of your vector (‘xc’ in my example) is determined by your computer’s memory. I do not know what you are calculating, so I cannot suggest a more efficient strategy.
2. In my example, i,j,k are stored as part of the cell element. If you want the cell array ‘Vector1’ to have 3 dimensions instead of 1, you can easily do that:
Vector1{i,j,k} = xc;
Then you can address each element individually. (You do not need the ‘k1’ counter if you do this.)

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