erwWeibul: Weibull-function

In SvenjaFischer/Disagg: Disaggregation of daily mean discharges to hourly discharges including the peak

Description

The Weibull-function given by {{Q}_{i}}(t)={{β }_{{{1}_{i}}}}+{{β }_{{{2}_{i}}}}{{β }_{{{3}_{i}}}}{{β }_{{{4}_{i}}}}{{((t-{{β }_{{{5}_{i}}}})β_{3_i})}^{{{β }_{{{4}_{i}}}}-1}}\exp (-{{β }_{{{3}_{i}}}}{{(t+{{β }_{{{5}_{i}}}})}^{{{β }_{{{4}_{i}}}}}}) with parameters β_{j_i}

Usage

erwWeibul(t, par = c(0, 1, -1, 5, -0.2))

Arguments

t	function argument, here: time step
par	parameters β_{j_i}, with starting values

Value

returns Q_i(t)

Author(s)

Svenja Fischer

Examples

## The function is currently defined as
function (t, par = c(0, 1, -1, 5, -0.2))
{
    par[1] + par[2] * par[3] * par[4] * ((t - par[5]) * par[3])^(par[4] -
        1) * exp(-par[3] * (t - par[5])^par[4])
  }

SvenjaFischer/Disagg documentation built on May 14, 2019, 10:37 a.m.