File: calerf.cat

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scilab 2.6-4
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calerf            Scilab Group            Scilab Function            calerf
NAME
   calerf -  computes error functions.
  
CALLING SEQUENCE
    y = calerf(x,flag)
  
PARAMETERS
 x    : real vector
      
 flag : integer indicator 
      
 y    : real vector (of same size)
      
DESCRIPTION
    calerf(x,0) computes the error function:
  
                       /x
      y = 2/sqrt(pi) *|  exp(-t^2) dt
                      /0
    calerf(x,1) computes the complementary error function:
  
                       /inf
      y = 2/sqrt(pi) *|  exp(-t^2) dt
                      /x
      y= 1 - erf(x)
    calerf(x,2) computes the  scaled complementary error function:
  
   y=exp(x^2)*erfc(x)~(1/sqrt{pi})*1/x for large x.
EXAMPLE
 deff('y=f(t)','y=exp(-t^2)');
 calerf(1,0)
 2/sqrt(%pi)*intg(0,1,f)
SEE ALSO
   erf, erfc, calerf