# RtoDPQ.d

From distr v2.7.0
by Peter Ruckdeschel

##### Default procedure to fill slots d,p,q given r for discrete distributions

function to do get empirical density, cumulative distribution and quantile function from random numbers

- Keywords
- distribution, arith, math

##### Usage

`RtoDPQ.d(r, e = getdistrOption("RtoDPQ.e"))`

##### Arguments

- r
the random number generator

- e
\(10^e\) numbers are generated, a higher number leads to a better result.

##### Details

`RtoDPQ.d`

generates \(10^e\) random numbers, by default \(e =\)
`RtoDPQ.e`

which are used to produce a density, cdf and
quantile function.
Of course, the results are usually not exact as they rely on random numbers.

##### Value

RtoDPQ returns a list of functions.

density

cumulative distribution function

quantile function

##### Note

Use RtoDPQ for absolutely continuous and RtoDPQ.d for discrete distributions.

##### See Also

##### Examples

```
# NOT RUN {
rn2 <- function(n){rnorm(n)^2}
x <- RtoDPQ(r = rn2, e = 4, n = 512)
# returns density, cumulative distribution and quantile function of
# squared standard normal distribution
x$dfun(4)
RtoDPQ(r = rn2, e = 5, n = 1024) # for a better result
rp2 <- function(n){rpois(n, lambda = 1)^2}
x <- RtoDPQ.d(r = rp2, e = 5)
# returns density, cumulative distribution and quantile function of
# squared Poisson distribution with parameter lambda=1
# }
```

*Documentation reproduced from package distr, version 2.7.0, License: LGPL-3*

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