MATLAB Answers

Z Yerby
0

How to turn an 1x1x3 array to a 1x3 vector?

Asked by Z Yerby
on 21 Jun 2019
Latest activity Commented on by Z Yerby
on 24 Jun 2019 at 0:55
Various manipulations I perform in my script create a 1x1x3 array which I then need to produce a dot product with a 1x3 vector. That's not playing together so I need to turn my 1x1x3 array into a 1x3 vector. I figure I can use vector=[array(1,1,1), array(1,1,2), array(1,1,3) ]; but I don't like how that looks and figure I could cut a line out if there was a function call that does the same thing. I assume there is one because this seems like something an existing function call would do but I cannot find it. Is there something I could use instead of vector=[array(1,1,1), array(1,1,2), array(1,1,3) ];?

  1 Comment

Sign in to comment.

2 Answers

Answer by madhan ravi
on 21 Jun 2019
Edited by madhan ravi
on 21 Jun 2019
 Accepted Answer

reshape(array,1,[]) % or squeeze() transposed

  1 Comment

I ended up using squeeze and it worked for my purposes well. Thanks.

Sign in to comment.


Answer by Bruce Elliott on 21 Jun 2019

Yes, there is an existing function to do that: permute().
Here's the help text:
% permute Permute array dimensions.
% B = permute(A,ORDER) rearranges the dimensions of A so that they are in
% the order specified by the vector ORDER. The resulting array has the
% same values as A but the order of the subscripts needed to access any
% particular element is rearranged as specified by ORDER. For an N-D
% array A, numel(ORDER)>=ndims(A). All the elements of ORDER must be
% unique.
%
% permute and IPERMUTE are a generalization of transpose (.')
% for N-D arrays.
%
% Example:
% a = rand(1,2,3,4);
% size(permute(a,[3 2 1 4])) % now it's 3-by-2-by-1-by-4.
%
% See also ipermute, circshift, size.

  0 Comments

Sign in to comment.