How to organize large column in to small Commons.

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friet
friet 2018-9-17
回答： Adam Danz 2018-9-17
Hello I have a large col vector in matlab with size of ~10000. I would like to cut the col at every 100 point as you see it below separate each col. and save it in separate
a1=[x(1:100)];
a2=[x(101:200)];
a3=[x(201:300)];
a4=[x(301:400)];... and so on.
Z=[a1,a2,a3]
However doing like this will take forever. Is ther anyway to do it in loop. Any help is appreciated.
best,

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回答（1 个）

Adam Danz
Adam Danz 2018-9-17
This requires dynamic variable naming and it's not a good practice. To understand why read this:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
Instead, if the length of your vector is a multiple of 100 and your data are numeric, turn your vector into a matrix where each column is your 'a1', 'a2', etc. Here's an example using reshape().
data = rand(10000,1);
dataMat = reshape(data, 100, []);
Your variable a12 is just column 12
dataMat(:,12)
If your data are not all numeric or the length of your vector is not a multiple of 100, describe your dataset and we can work out a solution using cell arrays.

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