Resizing a vector to a matrix

Question

Ramanan Viswanathan 2015-12-9

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https://ww2.mathworks.cn/matlabcentral/answers/259565-resizing-a-vector-to-a-matrix

评论： Stephen23 2015-12-9

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

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Answer 1

Stephen23 2015-12-9

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编辑：Stephen23 2015-12-9

在 MATLAB Online 中打开

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.

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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

在 MATLAB Online 中打开

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