numbering of matrices generation
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hi if i have
for j=1:3;
B=[A(j,1); A(j,1)]
end;
then how i got the matrices B1 B2 B3 instead of only B .
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Answers (1)
Stephen23
on 23 Jun 2016
Edited: Stephen23
on 23 Jun 2016
>> A = randi(9,3,1)
A =
6
5
9
>> B1 = A([1,1],1)
B1 =
6
6
>> B2 = A([2,2],1)
B2 =
5
5
>> B3 = A([3,3],1)
B3 =
9
9
But almost always creating numbered variables is a really bad idea. Just use indexing instead, because indexing is faster, more reliable, neater, and easier to read and understand than trying to create variable names dynamically. Read these to know why:
Or even better is to learn how to use MATLAB properly and avoid the loop altogether and use indexing:
>> A([1,1],1)
ans =
6
6
>> A([2,2],1)
ans =
5
5
Or if you really want to split A up into smaller matrices:
>> B = num2cell(A(:,[1,1]).',1);
>> B{1}
ans =
6
6
>> B{2}
ans =
5
5
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