const_decay {RNAdecay} | R Documentation

## exponential decay functions

### Description

Constant decay rate function (const_decay(), case when betas=0) e^-a*t; decaying decay rate function (decaying_decay()) e^(-(a/b)*(1-e^(-b*t))). Functions are normalized so at t=0 the function is 1.

### Usage

    const_decay(t, a)

    decaying_decay(t, par)

### Arguments

`t` | time (in minutes)
`a` | alpha (in per time, thus in per minute when time is in minutes)
`par` | vector of length 2 containing alpha (par[1]) and beta (par[2]) values; alpha=initial decay rate, beta=decay of decay rate (both in per time, thus in per minute when time is in minutes)

### Value

returns abundance after time `t` at alpha initial decay rate and beta decay of decay rate relative to an initial abundance of 1

### Examples

    const_decay(10,log(2)/10) ## returns 0.5
    decaying_decay(10,c(log(2)/10,0.01)) ##returns 0.5170495

[Package RNAdecay version 1.2.1 Index]