v?Arg

Computes argument of vector elements.

Syntax

call vcarg( n, a, y )

call vmcarg( n, a, y, mode )

call vzarg( n, a, y )

call vmzarg( n, a, y, mode )

Name	Type	Description
n	INTEGER, INTENT(IN)	Specifies the number of elements to be calculated.
a	FORTRAN77: COMPLEX for vcarg, vmcarg DOUBLE COMPLEX for vzarg, vmzarg COMPLEX, INTENT(IN) for vcarg, vmcarg DOUBLE COMPLEX, INTENT(IN) for vzarg, vmzarg	Array that specifies the input vector a.
mode	INTEGER(KIND=8), INTENT(IN)	Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Name

Type

Description

INTEGER, INTENT(IN)

Specifies the number of elements to be calculated.

FORTRAN77: COMPLEX for vcarg, vmcarg

DOUBLE COMPLEX for vzarg, vmzarg

COMPLEX, INTENT(IN) for vcarg, vmcarg

DOUBLE COMPLEX, INTENT(IN) for vzarg, vmzarg

Array that specifies the input vector a.

mode

INTEGER(KIND=8), INTENT(IN)

Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Name	Type	Description
y	DOUBLE PRECISION for vzarg, vmzarg REAL, INTENT(OUT) for vcarg, vmcarg DOUBLE PRECISION, INTENT(OUT) for vzarg, vmzarg	Array that specifies the output vector y.

Name

Type

Description

DOUBLE PRECISION for vzarg, vmzarg

REAL, INTENT(OUT) for vcarg, vmcarg

DOUBLE PRECISION, INTENT(OUT) for vzarg, vmzarg

Array that specifies the output vector y.

The v?Arg function computes argument of vector elements.

See Special Value Notations for the conventions used in the table below.

Special Values for Complex Function v?Arg(z)
RE(z) i·IM(z)	-∞	-X	-0	+0	+X	+∞	NAN
+i·∞	+3·`π`/4	+`π`/2	+`π`/2	+`π`/2	+`π`/2	+`π`/4	NAN
+i·Y	+`π`		+`π`/2	+`π`/2		+0	NAN
+i·0	+`π`	+`π`	+`π`	+0	+0	+0	NAN
-i·0	-`π`	-`π`	-`π`	-0	-0	-0	NAN
-i·Y	-`π`		-`π`/2	-`π`/2		-0	NAN
-i·∞	-3·`π`/4	-`π`/2	-`π`/2	-`π`/2	-`π`/2	-`π`/4	NAN
+i·NAN	NAN	NAN	NAN	NAN	NAN	NAN	NAN

Notes: