neg

neg(X)

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.

Return the negative of X.

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;

-m