Class Slartg

  extended by org.netlib.lapack.Slartg

public class Slartg
extends java.lang.Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact with any questions.

* .. * * Purpose * ======= * * SLARTG generate a plane rotation so that * * [ CS SN ] . [ F ] = [ R ] where CS**2 + SN**2 = 1. * [ -SN CS ] [ G ] [ 0 ] * * This is a slower, more accurate version of the BLAS1 routine SROTG, * with the following other differences: * F and G are unchanged on return. * If G=0, then CS=1 and SN=0. * If F=0 and (G .ne. 0), then CS=0 and SN=1 without doing any * floating point operations (saves work in SBDSQR when * there are zeros on the diagonal). * * If F exceeds G in magnitude, CS will be positive. * * Arguments * ========= * * F (input) REAL * The first component of vector to be rotated. * * G (input) REAL * The second component of vector to be rotated. * * CS (output) REAL * The cosine of the rotation. * * SN (output) REAL * The sine of the rotation. * * R (output) REAL * The nonzero component of the rotated vector. * * ===================================================================== * * .. Parameters ..

Field Summary
static boolean first
static float safmin
static float safmn2
static float safmx2
Constructor Summary
Method Summary
static void slartg(float f, float g, floatW cs, floatW sn, floatW r)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail


public static float safmin


public static float safmn2


public static float safmx2


public static boolean first
Constructor Detail


public Slartg()
Method Detail


public static void slartg(float f,
                          float g,
                          floatW cs,
                          floatW sn,
                          floatW r)