up previous next

List

Syntax

List(E:OBJECT):LIST

where E has type LIST, MAT, or VECTOR.
    

Summary

convert an expression into a list

Description

This function converts the expression E into a list. It is the same as Cast(E,LIST).

example

    
Use R ::= Q[x,y];
M:=Jacobian([x^2y^2,x+y]);
M;
Mat[
  [2xy^2, 2x^2y],
  [1, 1]
]
-------------------------------
Head(M);

-------------------------------
ERROR: Bad parameters
CONTEXT: Head(M)
-------------------------------
Head(List(M));
[2xy^2, 2x^2y]
-------------------------------
        
    
The error occurs because the function Head only accepts lists as arguments.

See Also