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  • Committer: Bazaar Package Importer
  • Author(s): Torsten Werner
  • Date: 2002-03-21 16:57:43 UTC
  • Revision ID: james.westby@ubuntu.com-20020321165743-e9mv12c1tb1plztg
Tags: upstream-2.6
Import upstream version 2.6

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man/elementary/calerf.cat
 
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calerf            Scilab Group            Scilab Function            calerf
 
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NAME
 
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   calerf -  computes error functions.
 
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CALLING SEQUENCE
 
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    y = calerf(x,flag)
 
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PARAMETERS
 
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 x    : real vector
 
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 flag : integer indicator 
 
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 y    : real vector (of same size)
 
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DESCRIPTION
 
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    calerf(x,0) computes the error function:
 
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                       /x
 
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      y = 2/sqrt(pi) *|  exp(-t^2) dt
 
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                      /0
 
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    calerf(x,1) computes the complementary error function:
 
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                       /inf
 
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      y = 2/sqrt(pi) *|  exp(-t^2) dt
 
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                      /x
 
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      y= 1 - erf(x)
 
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    calerf(x,2) computes the  scaled complementary error function:
 
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   y=exp(x^2)*erfc(x)~(1/sqrt{pi})*1/x for large x.
 
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EXAMPLE
 
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 deff('y=f(t)','y=exp(-t^2)');
 
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 calerf(1,0)
 
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 2/sqrt(%pi)*intg(0,1,f)
 
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SEE ALSO
 
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   erf, erfc, calerf    
 
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