setnullsignal {secr} | R Documentation

## Null signal strength

### Description

Set the signal value to be used for non-detections.

### Usage

    setnullsignal (value)

### Arguments

`value` | numeric value

### Details

A single numeric value is used internally to represent signal strength below the threshold of detection. The value should be less than any valid signal measurement.

The default value is 0 (zero). This is adequate for most terrestrial acoustic applications, in which signal strength is typically in the range 40 to 120 dB.

### Value

The old null value is returned. A side effect is to change the 'nullval' variable in the namespace of the package.

### Author(s)

Murray Efford murray.efford@otago.ac.nz

### Examples

    setnullsignal(-1e20)

[Package secr version 1.3.0 Index]