plot: plot spectra

Description Usage Arguments Details Value See Also Examples

Description

plot the spectra in a colorSpec object as lines

Usage

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## S3 method for class 'colorSpec'
plot( x, color=NULL, subset=NULL, main=TRUE, legend=TRUE, CCT=FALSE, add=FALSE, ... )

Arguments

x

a colorSpec object

color

If color=NULL then colors are computed from the spectra themselves. If type(x) is 'material' the color is computed using illuminant D65.1nm and responder BT.709.RGB with no further normalization. Otherwise the spectrum color is faked by changing its quantity to 'energy' and taking the product with BT.709.RGB. The resulting RGBs are normalized to have a maximum of 1. This RGB normalization is done before processing the subset argument.
If color='auto' then a suitable set of colors is generated using colorRampPalette().
Otherwise color is passed along to lines() as the col argument, e.g. col='black'.

subset

specifies a subset of x to plot; see subset() for acceptable arguments.

main

If main=TRUE then a main title is generated from the file 'path' in the metadata list, or from deparse(substitute(x)). If main=FALSE then no main title is displayed. And if main is a string then that string is used as the main title.

legend

If legend=TRUE then a pretty legend using specnames(x) is placed in the 'topright' corner of the plot. If legend is a string it is interpreted as naming a corner of the plot and passed as such to the function legend. If legend=FALSE then no legend is drawn.

CCT

If CCT=TRUE and the type of x is 'light' then the CCT of each spectrum is added to the legend; see computeCCT().

add

If add=TRUE then the lines are added to an existing plot, and these arguments are ignored: main, ylab, xlim, ylim, and log; see Details.

...

other graphical parameters, see Details

Details

Commonly used graphical parameters are:

lty, lwd

passed on to lines(), with no checks

pch

If pch is an integer, it is passed on to points() which adds points on top of the lines

ylab

If ylab is a string then it is passed on to plot.default(), otherwise suitable default string is generated.

xlim, ylim

If xlim and ylim are 2-vectors, they are passed to plot.default. If one of the components is NA then a suitable default is supplied.

log

passed on to plot.default(). Care must be taken for y because many spectra are 0 at some wavelengths, and even negative. Use ylim in such cases.

Value

TRUE or FALSE

See Also

print, summary, colorRampPalette in base.

Examples

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plot( 100 * BT.709.RGB )
plot( xyz1931.1nm, add=TRUE, lty=2, legend=FALSE )

colorSpec documentation built on April 2, 2018, 5:05 p.m.