Convert matrix in single column/row vector

Hi, I have to convert a matrix in one column/row vector composed of all the rows of the original matrix. How can I do this? Thanks. For example, to convert [1 2; 3 4] in to [1 2 3 4].

Answer 1

[Jos (10584)]

Take a look at reshape and transpose

A = [1 2 ; 3 4]
reshape(A,1,[])
transpose(A)
A.'
A(:)
reshape(A.',1,[])

Answer 2

[M Shujah Islam Sameem]

%%%% Converting Matix to vector

A = [1 2 3; 4 5 6; 7 8 9] % Example matrix

reshape(A,[],1) % convert matrix to column vector

reshape(A,1,[]) % convert matrix to row vector

[Samaa Yasser]

@M Shujah Islam Sameem excuse me ,, i want to convert image matrix size 256x256 to row vector with length same size can you please help me ?

[Rik]

'the same size', do you mean a vector length 256 or 65536? In the latter case, read the answer.

Answer 3

[Muhammad Usman]

A = [1 2; 3 4];

B = A(:) % convert the matrix into a column vector

C = A(:)' % convert the matrix into a row matrix

[Paolo Mulazzani]

not work: instead of 1 2 3 4 the result is 1 3 2 4

[Muhammad Usman]

A=[1 2; 3 4];

A=A';

A(:)

Answer 4

[Fariha Tabassum]

A = [1 2; 3 4];

B = A';

C = reshape(B,1,[])

ans of C will be [1 2 3 4]

[Yezi Kadhim]

Exactly what I wanted!.

A million Thanks!

[rishav baishya]

thanks a lot

Answer 5

[Çağatay Murat Yılmaz]

You can convert the following matrix to a vector using the following code.

input matrix:

0 1 0 2 3

4 5 6 7 8

9 10 11 12 13

output vector:

0 1 0 2 3 4 5 6 7 8 9 10 11 12 13

code:

vector=[];

for i=1:size(matrix,1)

vector=[vector matrix(i,:)];

end

[Rik]

Dynamically growing an array is very inefficient. You should consider transposing the array and using reshape.

[Petr]

Technically possible, but generally the least effective solution in Matlab. I would consider this bad practice.