subset_nri: Subsetting 'Nri'-objects

In hsdar: Manage, Analyse and Simulate Hyperspectral Data

Subsetting Nri-objects

Description

Return subsets of Nri-objects which meet conditions.

Usage

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

Arguments

x	Object of class 'Nri'.
subset	Logical expression indicating spectra to keep: missing values are taken as false. See details section.
...	Further arguments passed to agrep.

Details

Matchable objects are SI data. Use column names to identify the respectrive SI. See SI to access SI of a Nri. IDs of samples may be accessed using "id.nri" as variable name.

Value

Object of class Nri.

Author(s)

Lukas Lehnert

See Also

Nri, SI

Examples

data(spectral_data)

## Calculate all possible combinations for WorldView-2-8
spec_WV <- spectralResampling(spectral_data, "WorldView2-8",
                              response_function = FALSE)
nri_WV <- nri(spec_WV, recursive = TRUE)

## Return names of SI data
names(SI(nri_WV))

## Divide into both seasons
sp_summer <- subset(nri_WV, season == "summer")
sp_spring <- subset(nri_WV, season == "spring")

## Print both Nri-objects
sp_summer
sp_spring

## Divide into both seasons and years
sp_summer_14 <- subset(nri_WV, season == "summer" & year == 2014)
sp_spring_14 <- subset(nri_WV, season == "spring" & year == 2014)

## Print both Nri-objects
sp_summer_14
sp_spring_14

hsdar documentation built on March 18, 2022, 6:35 p.m.