I write L' but in the command window it writes ans. Why?

[Torsten]

To put it easily:

If you operate on a variable or matrix (e.g. transpose L), this new expression is not alligned to an already existing variable and its name. So you will get "ans" for it in the command window.

If you do

Ltransp = L'

"Ltransp" instead of "ans" will appear.

[John D'Errico]

@Alexandra Panayiota Gregoriou - generally, please use flags to indicate posts that require moderator attention of some sort, not as a way to thank a person for a response. Your flag said:

"ohh. Tahnkyouuu"

which is nice to acknowledge the help you got. But use a comment to do so.

Answer 1

[Shanmukha Voggu]

Hi Alexandra,

Adding to the comments above, Refer to this documentation link: https://www.mathworks.com/help/matlab/ref/ans.html for more information.

Hope this helps!