Newbie question - converting a vector into a cellarray of vectors

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matal 2011-7-7

I have a vector X and want a cell array C containing N copies of that vector. How do I do that?

Here is how I am doing it now:

X = 1:5; N = 3;

C = mat2cell( repmat( X, N, 1 ), ones( N, 1 ), size( X, 2 ) );

This just feels like something that should be a primitive - converting back & frth betweenmatrices and cellarrays in different ways.

Oleg Komarov 2011-7-7

% To cell

C = repmat({X},N,1);

% To mat

cell2mat(C)
cat(1,C{:})

Sean de Wolski 2011-7-8

Also num2cell, which allows you to concatenate along a dimension.

Jan 2011-7-8

More efficient, because shared data copies are created:

C = cell(N, 1);
C(:) = {X};

Oleg Komarov 2011-7-8

C(1:N) = deal({X}); Same behaviour?

Jan 2011-7-8

@Oleg: Same behaviour and equivalent speed.

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