Opposite column order

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Esteban
Posts: 10
Joined: Tue May 14, 2019 12:13 pm

Opposite column order

Unread post by Esteban »

Hellow,

Is there a way in which you could change, the column order to exactly the opposite.

What I mean is, I want this:

[1,0,2,1,0]

To become this:

[0,1,2,0,1]

I will be useful if it works for both the columns and the rows of a matrix.

Regards,
TomDoan
Posts: 7536
Joined: Wed Nov 01, 2006 4:36 pm

Re: Opposite column order

Unread post by TomDoan »

dec rect b(%rows(a),%cols(a))
ewise b(i,j)=a(%rows(a)+1-i,j)

will make B a copy of A with the rows reversed. You can do the analogous operation with the columns. (You can also do the rows and columns together).
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