Column space of a matrix

221 views (last 30 days)
a_Kumar16
a_Kumar16 on 5 Jul 2020
Commented: Rik on 19 May 2022
Hi there,
I would like to find the column space of a matrix, but don't want the basis to be orthonormalised.
I tried the colspace function, but it seems to orthonormalise the basis.
For instance,
A = [1 0.2 3; -1 0.3 1; 2 -4 7];
colspace(sym(A))
Gives the answer:
[ 1, 0, 0]
[ 0, 1, 0]
[ 0, 0, 1]
However, in this particular example I would expect the first three columns of the matrix A as the answer if no orthonormalisation is done.
Any ideas how to achieve this?
Thanks and regards....

Answers (1)

Matt J
Matt J on 5 Jul 2020
Edited: Matt J on 5 Jul 2020
You can use this FEX submission,
Example:
A =
1.0000 0.2000 3.0000 1.0000 0.2000 3.0000
-1.0000 0.3000 1.0000 -1.0000 0.3000 1.0000
2.0000 -4.0000 7.0000 2.0000 -4.0000 7.0000
>> licols(A)
ans =
1.0000 0.2000 3.0000
-1.0000 0.3000 1.0000
2.0000 -4.0000 7.0000
  2 Comments
Rik
Rik on 19 May 2022
@othusitse molokele Can you give an example?

Sign in to comment.

Categories

Find more on Creating and Concatenating Matrices in Help Center and File Exchange

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by