NAME

lapy3 - lapy3: robust sqrt( x^2 + y^2 + z^2 )

SYNOPSIS

Functions

double precision function dlapy3 (x, y, z)
DLAPY3 returns sqrt(x2+y2+z2). real function slapy3 (x, y, z)
SLAPY3 returns sqrt(x2+y2+z2).

Detailed Description

Function Documentation

double precision function dlapy3 (double precision x, double precision y, double precision z)

DLAPY3 returns sqrt(x2+y2+z2).

Purpose:



 DLAPY3 returns sqrt(x**2+y**2+z**2), taking care not to cause


 unnecessary overflow and unnecessary underflow.

Parameters



          X is DOUBLE PRECISION



          Y is DOUBLE PRECISION



          Z is DOUBLE PRECISION


          X, Y and Z specify the values x, y and z.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 67 of file dlapy3.f.

real function slapy3 (real x, real y, real z)

SLAPY3 returns sqrt(x2+y2+z2).