Finds the depth in a Biosonics echosounder file, by finding the strongest reflector and smoothing its trace.
findBottom(x, ignore = 5, clean = despike)number of metres of data to ignore, near the surface.
a function to clean the inferred depth of spikes.
A list with elements: the time of a ping, the depth of
the inferred depth in metres, and the index of the inferred bottom
location, referenced to the object's depth vector.
The documentation for '>echosounder explains the
structure of echosounder objects, and also outlines the other
functions dealing with them.
Other things related to echosounder data:
[[,echosounder-method,
[[<-,echosounder-method,
as.echosounder(),
echosounder-class,
echosounder,
plot,echosounder-method,
read.echosounder(),
subset,echosounder-method,
summary,echosounder-method