Command Reference : Matrix Language Reference
  
 
@columnextract
Syntax: @columnextract(m, n)
Argument 1: matrix or sym, m
Argument 2: integer, n
Return: vector
Extract a vector from column n of the matrix object m, where m is a matrix or sym. Example:
vector v1 = @columnextract(m1,3)
Note that while you may extract the first column of a column vector, or any column of a row vector, the command is more easily executed using simple element or vector assignment in these cases.
See also @rowextract.