igamma

0th

Percentile

Inverse of the digamma function

Function igamma is a numerical inverse of digamma.

Keywords
math
Usage
igamma(v)
Arguments
v
a numeric in the range [-100000,18]
Details

igamma is vectorized; it is won by spline inversion of a grid; it works well for range [digamma(1e-5);digamma(1e8)] or [-100000,18].

Value

is a value u such that digamma(u is approximately x.

See Also

digamma

Aliases
  • igamma
Examples
igamma(digamma(c(1e-4,1,20,1e8)))
Documentation reproduced from package distr, version 2.6, License: LGPL-3

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