detectbound: Detect bounds for density function
In fitdistrplus: Help to Fit of a Parametric Distribution to Non-Censored or Censored Data

Description Usage Arguments Details Value Author(s) References See Also Examples

Manual detection of bounds of parameter of a density function/

1	detectbound(distname, vstart, obs, fix.arg=NULL, echo=FALSE)

`distname`	A character string `"name"` naming a distribution for which the corresponding density function `dname` must be classically defined.
`vstart`	A named vector giving the initial values of parameters of the named distribution.
`obs`	A numeric vector for non censored data.
`fix.arg`	An optional named vector giving the values of fixed parameters of the named distribution. Default to `NULL`.
`echo`	A logical to show some traces.

This function manually tests the following bounds : -1, 0, and 1.

detectbound returns a 2-row matrix with the lower bounds in the first row and the upper bounds in the second row.

Christophe Dutang and Marie-Laure Delignette-Muller.

Delignette-Muller ML and Dutang C (2015), fitdistrplus: An R Package for Fitting Distributions. Journal of Statistical Software, 64(4), 1-34.

fitdist.

#case where the density returns a Not-an-Numeric value.
detectbound("exp", c(rate=3), 1:10)
detectbound("binom", c(size=3, prob=1/2), 1:10)
detectbound("nbinom", c(size=3, prob=1/2), 1:10)