convert into a single row matrix [duplicate]

Answer 1

a'(:)' %# Octave
b= a'; b(:)' %# Matlab

For more information on column-major order and on colon.

Added, more verbose variations may be occasionally practical as well:

a'(ind2sub([3 3], 1: 9))
permute(a, [2 1])(ind2sub([3 3], 1: 9))

Here permute(a, [2 1]) is now equivalent to a.'.

Answer 2

This is how you do it in Matlab

a1 = a(:);

Or if you need to go by rows, transpose it before and after:

b = a';
b1 = b(:);
a1 = b1';

Answer 3

One more variant

a = reshape( a.', 1, numel(a) )

Note use of .' to get the non-conjugated TRANSPOSE - ' corresponds to CTRANSPOSE