Resizing a vector to a matrix
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I have a vector which is of size 1x3. I want to resize to 13x3 matrix..is it possible to do it? how can i proceed
回答（1 个）
It depends on how you want to resize the vector. If you simply want to replicate those values into every row of the final matrix, then try either of these methods:
>> X = [1,2,3]
X =
1 2 3
>> repmat(X,5,1)
ans =
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
>> X(ones(1,5),:)
ans =
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
Note that I created 5x3 matrices, but I am sure that you can figure out how to create 13x3 matrices.
3 个评论
Ramanan Viswanathan
2015-12-9
James Tursa
2015-12-9
@Ramanan: You need to be more specific. As Stephen has already stated, you need to tell us how you want this to be done. Maybe give us an example.
Stephen23
2015-12-9
Here is another easy way to resize a vector, by adding a value and filling the rest with zeros:
>> X = [1,2,3]
X =
1 2 3
>> X(5,1) = 0
X =
1 2 3
0 0 0
0 0 0
0 0 0
0 0 0
I repeat my original comment: how do you want your matrix expanded (if not with replicated values)?
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2015-12-9
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