Yules {VGAM} | R Documentation

## Yule-Simon Distribution

### Description

Density, distribution function, quantile function and random generation for the Yule-Simon distribution.

### Usage

    dyules(x, shape, log = FALSE)
    pyules(q, shape, lower.tail = TRUE, log.p = FALSE)
    qyules(p, shape)
    ryules(n, shape)

### Arguments

`x, q, p, n` | Same meaning as in `Normal`.

`shape` | See `yulesimon`.

`log, lower.tail, log.p` | Same meaning as in `pnorm` or `qnorm`.

### Details

See `yulesimon`, the VGAM family function for estimating the parameter, for the formula of the probability density function and other details.

### Value

`dyules` gives the density, `pyules` gives the distribution function, `qyules` gives the quantile function, and `ryules` generates random deviates.

### Note

Numerical problems may occur with `qyules()` when `p` is very close to 1.

### Author(s)

T. W. Yee

### See Also

`yulesimon`.

### Examples

    dyules(1:20, 2.1)
    ryules(20, 2.1)

    round(1000 * dyules(1:8, 2))
    table(ryules(1000, 2))

    ## Not run:  x <- 0:6
    plot(x, dyules(x, shape = 2.2), type = "h", las = 1, col = "blue")
    ## End(Not run)

[Package VGAM version 1.0-3 Index]