problem in Matrix Indexing
3 views (last 30 days)
Show older comments
Hi, below code i am trying to read matrix elements from an array of elements. i should get 5x3 matrix like
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
but i am gettting like below
1 2 3
1 2 3
1 2 3
1 2 3
3 3 3
i understand there is some problem with indexing.
Please help me in getting this.
i got some answer saying that to remove f(i,:)=k(x) if i do that f is 1 2 3 it is only 1X3 matrix i need it to be 5X3.
i dont want to use repmat because i have to use this in other context where i can not use.
Thanks,
Sita
n=5; v=3; k=[1 2 3];
for i=1:n
x=0;
for j=1:1:v
x=x+1;
f(:,j)= k(x);
end
f(i,:)=k(x)
end
2 Comments
José-Luis
on 22 Nov 2012
Remove
f(i,:) = k(x);
The result of your loop will be a 5x3 matrix. It will be a 1x3 matrix only on the first iteration. Consider preallocating for speed.
Walter Roberson
on 22 Nov 2012
Accepted Answer
vipul utsav
on 22 Nov 2012
Edited: Walter Roberson
on 22 Nov 2012
n=5; v=3; k=[1 2 3];
for i=1:n
x=0;
for j=1:v
x=x+1;
f(i,j)= k(x);
end
end
0 Comments
More Answers (1)
Arthur
on 22 Nov 2012
Well, if you insist not to use repmat (why??), I'd do it like this:
f = zeros(n,v);
for i = 1:v
f(:,i) = k(i);
end
1 Comment
See Also
Categories
Find more on Resizing and Reshaping Matrices in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!