$LGamma: Difference between revisions
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Revision as of 20:57, 4 January 2012
LGamma function
Most Sirius $functions have been deprecated in favor of Object Oriented methods. There is currently no direct OO equivalent for the $LGamma function.
The $LGamma function returns the value:
- hp0 font=chapn.
- &numsp.&'sub(&infin.)
log&'sub(e) &'sub(0)&int. u&'sup( x-1) e&'sup( - u) du
- ehp0.
Syntax
%num = $LGamma(x)
If x is not in the range 0 < x < 4.2913 * 10&'sup(73), an error message is printed and a 0 is returned.
See the SIRFUNC EXEC parameter for an explanation of when this high-performance, high-precision version of the IBM mathematical function from the Sirius Mods is used, as opposed to the version of the $function in the Model 204 FUND or FUNDLE CSECT.