neg
Syntax
neg(X)
Arguments
X is a scalar/pair/vector/matrix.
Though neg
and the -
operator often serve analogous
purposes, precedence behavior differs:
-
The
neg
function, when parenthesized carries the highest priority, e.g., neg(3) + 5 is -3 + 5. Without parentheses,neg
has lower precedence than the following expression, e.g., neg 3 + 5 is treated as -(3 + 5) resulting -8. -
The
-
operator always follows the precedence rule. For example: -3 + 5 results in 2.
Details
Return the negative of X.
Examples
x=1:2;
-x;
// output
-1 : -2
x=1 0 1;
-x;
// output
[-1,0,-1]
m=1 1 1 0 0 0 $ 2:3;
m;
#0 | #1 | #2 |
---|---|---|
1 | 1 | 0 |
1 | 0 | 0 |
-m
#0 | #1 | #2 |
---|---|---|
-1 | -1 | 0 |
-1 | 0 | 0 |