R: Subset an amsr Object

subset,amsr-method {oce} | R Documentation

## Subset an amsr Object

### Description

Return a subset of a amsr object.

### Usage

    ## S4 method for signature 'amsr'
    subset(x, subset, ...)

### Arguments

`x` | an amsr object.
`subset` | an expression indicating how to subset `x`.
`...` | ignored.

### Details

This function is used to subset data within an amsr object by `longitude` or by `latitude`. These two methods cannot be combined in a single call, so two calls are required, as shown in the Example.

### Value

An amsr object.

### Author(s)

Dan Kelley

### See Also

Other things related to amsr data: `[[,amsr-method`, `[[<-,amsr-method`, `amsr-class`, `amsr`, `composite,amsr-method`, `download.amsr()`, `plot,amsr-method`, `read.amsr()`, `summary,amsr-method`

Other functions that subset oce objects: `subset,adp-method`, `subset,adv-method`, `subset,argo-method`, `subset,cm-method`, `subset,coastline-method`, `subset,ctd-method`, `subset,echosounder-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`

### Examples

    library(oce)
    data(amsr) # see ?amsr for how to read and composite such objects
    sub <- subset(amsr, -75 < longitude & longitude < -45)
    sub <- subset(sub,   40 < latitude  &  latitude <  50)
    plot(sub)
    data(coastlineWorld)
    lines(coastlineWorld[['longitude']], coastlineWorld[['latitude']])

[Package oce version 1.7-2 Index]