query: query webdata for various fields

In USGS-R/geoknife: Web-Processing of Large Gridded Datasets

query webdata for various fields

Description

a method for finding possible values for a given field

Usage

query(.Object, field, ...)

## S4 method for signature 'webdata,character'
query(.Object, field, ...)

## S4 method for signature 'webdata,missing'
query(.Object, field, ...)

## S4 method for signature 'character,missing'
query(.Object, field, ...)

## S4 method for signature 'webprocess,character'
query(.Object, field, ...)

## S4 method for signature 'webgeom,character'
query(.Object, field, ...)

Arguments

.Object	a webdata, webgeom, or webprocess object.
field	a plural parameter name for fields in .Object (e.g., 'variables', 'times')
...	additional arguments passed to methods

Value

a character vector of values corresponding to the query field specified

Author(s)

Jordan S. Read

Examples

## Not run: 
fabric <- webdata('prism')
query(fabric, 'variables')
wg <- webgeom()
query(wg, 'geoms')
geom(wg) <- "sample:CONUS_states"
query(wg, 'attributes')
attribute(wg) <- 'STATE'
query(wg, 'values', rm.duplicates = TRUE)

## End(Not run)

USGS-R/geoknife documentation built on April 17, 2023, 8:26 p.m.