3.1.4.2 Unary forms
Unary or oneoperand forms
are summarized in the following table, where X
stands for the operand.
Op  Operand
 Result  Description


X  scalar
 scalar  Unary scalar negation.

X  vector
 vector  Unary vector negation.

X  vector
 scalar  Vector length.

unit(X)  vector
 vector  Unit vector with same direction.

sqrt(X)  scalar
 scalar  Scalar square root.

sin(X)  scalar
 scalar  Trigonometric sine (X in degrees).

cos(X)  scalar
 scalar  Trigonometric cosine (X in degrees).

atan2(X,Y)  scalar
 scalar  Polar angle in degrees of vector [X,Y].

inverse(X)  transform
 transform  Inverse transform.

Errors are reported when X
, unit
, sqrt
,
atan2
, and inverse
fail due to bad parameters.