| setnullsignal {secr} | R Documentation |
Set the signal value to be used for non-detections.
setnullsignal (value)
value |
numeric value |
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.
The old null value is returned. A side effect is to change the 'nullval' variable in the namespace of the package.
Murray Efford murray.efford@otago.ac.nz
setnullsignal(-1e20)