Re: Extracting a column of a matrix as a column vector

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Wed, May 17, 2017 at 05:04:47PM +0200, Dirk Laurie wrote:
> I have various clumsy solutions:
> 
> vector(matsize(A)[1], i, A[i,j])~
> Vec(vecextract(A,j))[1]
> 
> I feel I am missing a trick here.

What about A[,j] ?
Also supported are
A[j,] (lines)
A[,1..3]
A[1..2,2..3] (sub matrix)
A[,^j] (remove column j)
etc.

Cheers,
Bill.