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CLNGAMName:
where z is a complex number with a positive real component. The log gamma function is simply the natural logarithm of the above function. It is frequently used in computations instead of the complex gamma function because it is less subject to overflow problems. Dataplot computes this function using the CLNGAM routines from "Computation of Special Functions" (see the References section below).
<xc> is a variable, number, or parameter; positive values; <yr> is a variable or a parameter (depending on what <xr> and <xc> are) where the computed log gamma values are stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
This syntax computes the real component of the complex
log gamma function. The
<xc> is a variable, number, or parameter; positive values; <yr> is a variable or a parameter (depending on what <xr> and <xc> are) where the computed log gamma values are stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
This syntax computes the complex component of the complex
log gamma function. The
LET A = CLNGAMI(1,2)
LET YR = CLNGAM(XR,2)
LET YR = CLNGAM(XR,XC)
"Handbook of Mathematical Functions, Applied Mathematics Series, Vol. 55", Abramowitz and Stegun, National Bureau of Standards, 1964 (chapter 6).
MULTIPLOT CORNER COORDINATES TITLE AUTOMATIC PLOT CLNGAM(XR,2) FOR XR = 0.1 0.1 5 PLOT CLNGAM(XR,5) FOR XR = 0.1 0.1 5 PLOT CLNGAMI(XR,2) FOR XR = 0.1 0.1 5 PLOT CLNGAMI(XR,5) FOR XR = 0.1 0.1 5 END OF MULTIPLOT
Date created: 6/5/2001 |