plot.speclib: Plot speclib

In hsdar: Manage, Analyse and Simulate Hyperspectral Data

Plot speclib

Description

Plot Speclib in a new plot or adding it to an existing plot.

Usage

## S4 method for signature 'Speclib'
plot(x, FUN = NULL, new = TRUE, ...)

Arguments

x	Object of class Speclib.
FUN	Name of a function (character) or index or ID of single spectrum to plot (integer).
new	If FALSE the plot is added to active existing plot.
...	Further arguments passed to internal plot functions.

Details

The function may work in a couple of modes. The default way is to plot mean values (solid line) of all spectra and the standard deviations within bands. If data is assumed to be continuous the standard deviations are plotted as dashed lines otherwise error bars will indicate standard deviations.

The user has various options to change the way things are looking: With argument FUN the name of a function, the ID or the index of a certain spectrum may be specified. Note that if FUN is a function, this function will be applied to all spectra. If function should be applied to a subset of spectra, use function subset to define rules excluding certain spectra.

By passing a subset, the user may specify a spectral range to plot. Limits for x- and y-axis will be found automatically or may be passed separately.

Author(s)

Lukas Lehnert

See Also

Speclib

Examples

data(spectral_data)

## Set mask for channel crossing and water absorption bands
mask(spectral_data) <- c(1040, 1060, 1350, 1450)

## Simple example
plot(spectral_data, legend = list(x = "topleft"))

## Example with function
par(mfrow = c(2,3))
plot(spectral_data, FUN = "min", main = "Minimum of speclib")
plot(spectral_data, FUN = "max", main = "Maximum of speclib")
plot(spectral_data, FUN = "median", main = "Median of speclib")
plot(spectral_data, FUN = "mean", main = "Mean of speclib")
plot(spectral_data, FUN = "var", main = "Variance of speclib")

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