Subset an echosounder Object

This function is somewhat analogous to subset.data.frame(). Subsetting can be by time or depth, but these may not be combined; use a sequence of calls to subset by both.

# S4 method for echosounder
subset(x, subset, ...)

Arguments

x

an echosounder object.

subset

a condition to be applied to the data portion of x. See “Details”.

...

ignored.

Value

An echosounder object.

See also

Other things related to echosounder data: [[,echosounder-method, [[<-,echosounder-method, as.echosounder(), echosounder-class, echosounder, findBottom(), plot,echosounder-method, read.echosounder(), summary,echosounder-method

Other functions that subset oce objects: subset,adp-method, subset,adv-method, subset,amsr-method, subset,argo-method, subset,cm-method, subset,coastline-method, subset,ctd-method, subset,lobo-method, subset,met-method, subset,oce-method, subset,odf-method, subset,rsk-method, subset,sealevel-method, subset,section-method, subset,topo-method, subset,xbt-method

Author

Dan Kelley

Examples

library(oce)
data(echosounder)
plot(echosounder)

plot(subset(echosounder, depth < 10))

plot(subset(echosounder, time < mean(range(echosounder[['time']]))))