ChemoSpec: plotLoadings – R documentation

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plotLoadings

Plot PCA Loadings for a Spectra Object

Creates a multi-panel plot of loadings along with a reference spectrum.

plotLoadings(spectra, pca, loads = c(1), ref = 1, ...)

`spectra`	An object of S3 class `Spectra`.
`pca`	An object of class `prcomp`, modified to include a list element called `$method`, a character string describing the pre-processing carried out and the type of PCA performed (it appears on the plot). This is automatically provided if `ChemoSpec` functions `c_pcaSpectra` or `r_pcaSpectra` were used to create `pca`.
`loads`	An integer vector giving the loadings to plot. More than 3 loadings creates a useless plot using the default graphics window.
`ref`	An integer specifying the reference spectrum to plot, which appears at the bottom of the plot.
`...`	Additional parameters to be passed to plotting functions.

None. Side effect is a plot.

Bryan A. Hanson, DePauw University.