df1b2cum.cpp

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#include <df1b2fun.h>

df1b2variable inv_cumd_exponential(const df1b2variable& y)
{
  if (value(y)<=0.5)
    return log(2.0*y);
  else
    return log(2.0*(1-y));
}

df1b2variable cumd_exponential(const df1b2variable& x)
{
  if (value(x)<=0.0)
    return 0.5*exp(x);
  else
    return 1.0-0.5*exp(-x);
}