How to insert a blank column in the matrix
48 views (last 30 days)
Show older comments
Hi All,
I have a matrix X [1 2 3 4 5]. How do I insert a blank column in between? Eg X = [1 2 3 (blank) 4 5] Thanks,
0 Comments
Accepted Answer
dpb
on 17 Jul 2015
inPos=4; % location at which to insert
Nz=1; % number of zeros to insert
x=[x(1:inPos-1) repmat(0,1,N) x(nPos:end];
In more general case of an array the subscripts will need to run over all rows using the ":" operator and the above would be the column indices. the '1' argument in repmat would then be the value of size(x,1) of course (or use zeros with appropriate size(s).
0 Comments
More Answers (1)
Walter Roberson
on 17 Jul 2015
Numeric matrices cannot have blank columns. You can put in any constant value, including -inf, inf, and NaN, but not blank.
Cell arrays can have entries which are the empty matrix.
1 Comment
dpb
on 17 Jul 2015
Good point, Walter; I skimmed over the "blank" reading it as zero w/o even thinking of it...but, I guess it was good enough. :)
See Also
Categories
Find more on Creating and Concatenating Matrices in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!