list2mat takes as argument a list l and an integer
p.
list2mat returns a matrix having p columns
by cutting the list l in rows of length p.
The matrix is filled with 0s if the size of l is not
a multiple of p.
Input :
Output :
Input :
Output :
Remark
Xcas displays matrix with [ and ] and lists with [ and ]
as delimiters (the vertical bar of the brackets are thicker for matrices).