# startbernweibull: Rough parameter estimate for the Bernoulli-Weibull... In qmap: Statistical Transformations for Post-Processing Climate Model Output

## Description

Estimates rough starting values for the Bernoulli-Weibull distribution using the method of moments for the `shape` and the `scale` parameters. The probability of non-zero events is estimated as the fraction of values that are larger than zero.

## Usage

 `1` ```startbernweibull(x) ```

## Arguments

 `x` numeric vector.

## Value

A list containing:

 `prob` probability of non-zero event. `scale` scale parameter of the weibull distribution. `shape` shape parameter of the weibull distribution.

## Note

In this package `startbernweibull` is intended to be used in conjunction with `fitQmapDIST` (and `mledist`) with parameter `distr="bernweibull"`.

## Author(s)

Lukas Gudmundsson

`fitQmapDIST`, `bernweibull`, `fitdist`

## Examples

 ```1 2 3``` ```gg <- rbernweibull(n=300, prob=0.2, scale=1, shape=1) startbernweibull(gg) mledist(gg,"bernweibull",startbernweibull(gg)) ```

### Example output

```Loading required package: fitdistrplus
\$prob
[1] 0.1966667

\$shape
[1] 1.092038

\$scale
[1] 1.008519

\$estimate
prob     shape     scale
0.1966526 1.1012666 0.9982891

\$convergence
[1] 0

\$value
[1] 204.9969

\$hessian
prob         shape     scale
prob   1.899153e+03 -7.105427e-09   0.00000
shape -7.105427e-09  8.957628e+01 -25.66546
scale  0.000000e+00 -2.566546e+01  71.79244

\$optim.function
[1] "optim"

\$optim.method

\$fix.arg
NULL

\$fix.arg.fun
NULL

\$weights
NULL

\$counts