MATLAB: Matrix formed by Vectors?Easy question.

matrix formed by vectors

I have a matrix size=10×10. And I want to obtain each column as a vector. Or vectors will create a matrix. How can I do that? Thanks in advance.

Best Answer

Yup, simple:

M  =randn(10);
for i1 = 1:size(M;2)
  V{i1} = M(:,i1);
end

Then you have your vectors in the cells of V.

The other direction:

M = [v1,v2,v3,....,vN];

There vN has to be column vectors.

HTH

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MATLAB: Building matrix using vectors?Easy question.

Depending what you have:

 1) matrix = [row_vector1;row_vector2; ... row_vectorn];
 2) matrix = [col_vector1, col_vector2, ... col_vectorn]';
 3) matrix(row_number1,:) = vector1;
    matrix(row_number2,:) = vector2;
    matrix(row_number3,:) = vector3;

MATLAB: How to concatenate string vectors of unequal length

Try this:

% Define component cell arrays.
v1 = {'a'; 'b'; 'c'}
v2 = {'d'}
v3 = {'e'; 'f'}
% Find out how  big cell array needs to be.
lv1 = length(v1);
lv2 = length(v2);
lv3 = length(v3);
rows = max([lv1,lv2,lv3])
% Instatiate cell array of the max size.
v4 = cell(rows, 3)
% stuff each column in.
v4(1:lv1, 1) = v1;
v4(1:lv2, 2) = v2;
v4(1:lv3, 3) = v3;
% Print out results
fprintf('\n\nHere is the output cell array:\n');
v4

In the command window:

Here is the output cell array:

v4 = 
    'a'    'd'    'e'
    'b'     []    'f'
    'c'     []     []

Best Answer

Related Solutions

MATLAB: Building matrix using vectors?Easy question.

MATLAB: How to concatenate string vectors of unequal length

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