add numerical array as column or in cell array
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How to add a numerical array
a=[1 2 3 4]
as row into my cell
C = |'a' 'b' 'c' 'd'|
|'e' 'f' 'g' 'h'|
|'i' 'j' 'k' 'l'|
|'m' 'n' 'o' 'p'|
so, that
C = |'1' '2' '3' '4'|
|'a' 'b' 'c' 'd'|
|'e' 'f' 'g' 'h'|
|'i' 'j' 'k' 'l'|
|'m' 'n' 'o' 'p'|
or as new column into cell C:
C = |'1' 'a' 'b' 'c' 'd'|
|'2' 'e' 'f' 'g' 'h'|
|'3' 'i' 'j' 'k' 'l'|
|'4' 'm' 'n' 'o' 'p'|
(the numerical values become strings).
AND: How to transform for example a 2x4 cell into a 1x8 (or 8x1) cell:
C= |'a' 'b' 'c' 'd'| ----> C = |'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h'|
|'e' 'f' 'g' 'h'|
or:----> C = |'a'|
|'e'|
|'b'|
|'f'|
|'c'|
|'g'|
|'d'|
|'h'|
I can solve these problems with for-loops, but imagine you have a huge size of the cell array, it is not very efficient. Is there an easier way? Thanks!
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Accepted Answer
Jan
on 23 Nov 2012
Edited: Jan
on 23 Nov 2012
C = {'a' 'b' 'c' 'd'; ...
'e' 'f' 'g' 'h'; ...
'i' 'j' 'k' 'l'; ...
'm' 'n' 'o' 'p'};
a = [1 2 3 4];
tmp = sprintf('%g*', a);
tmp(end) = [];
aC = regexp(tmp, '*', 'split');
C_row = cat(1, aC, C); % Insert as row
C_col = cat(2, aC', C); % Insert as column
C2 = reshape(transpose(C), 1, [])
C3 = reshape(C, [], 1)
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More Answers (1)
Azzi Abdelmalek
on 23 Nov 2012
Edited: Azzi Abdelmalek
on 23 Nov 2012
C = {'a' 'b' 'c' 'd'
'e' 'f' 'g' 'h'
'i' 'j' 'k' 'l'
'm' 'n' 'o' 'p'}
a=[1 2 3 4]
out=[num2cell(a); C]
%or
out=[num2cell(a') C]
% for third case
out=C(:)'
%or
out=reshape(C,1,[])
3 Comments
Azzi Abdelmalek
on 23 Nov 2012
Ok Simon,
outv=[arrayfun(@(x) cellstr(num2str(x)),a); C]
or
outh=[arrayfun(@(x) cellstr(num2str(x)),a)' C]
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