oce (version 0.2-1)

subset.oce: Subset an oce object

Description

Subset an oce object

Usage

## S3 method for class 'oce':
subset(x, subset, indices=NULL, debug=getOption("oceDebug"), ...)

Arguments

x

an oce object.

subset

a condition to be applied to the data portion of x (ignored for station objects).

indices

list of station indices (used only for section objects).

debug

a flag that turns on debugging. Set to 1 to get a moderate amount of debugging information, or to 2 to get more.

...

ignored.

Value

• A new oce object.

Details

This is analogous to subset.data.frame. Note that it only works for objects in which the data portion is a data frame, e.g. ctd objects.

For objects of class adp, the subset may be in terms of time or distance; to combine these, use two steps (see Examples).

See Also

window.oce provides a simpler, but less powerful, way to subset data.

Examples

library(oce)
# CTD data
data(ctd)
plot(ctd)
plot(subset(ctd, pressure>10))

# ADP example, subsetted by time and distance
data(adp)
adp.near <- subset(adp, distance < 10)
# Note that the data may be accessed directly, as below
adp.near.early <- subset(adp.near, time < mean(adp.near$data$ts$time))
plot(adp.near.early)