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hyperSpec (version 0.95)

spc.bin: Wavelength Binning

Description

In order to reduce the spectral resolution and thus gain signal to noise ratio or to reduce the dimensionality of the spectral data set, the spectral resolution can be reduced.

Usage

spc.bin(spc, by = stop ("reduction factor needed"), na.rm = TRUE, ...)

Arguments

spc
the hyperSpec object
by
reduction factor
na.rm
decides about the treatment of NAs: if FALSE or 0, the binning is done using na.rm = FALSE if TRUE or 1, the binning is done using na.rm = TRUE
...
handed to logentry.

Value

  • A hyperSpec object with ceiling (nwl (spc) / by) data points per spectrum.

Details

The mean of every by data points in the spectra is calculated. Using na.rm = TRUE always takes about twice as long as na.rm = FALSE. If the spectra matrix does not contain too many NAs, na.rm = 2 is faster than na.rm = TRUE.

Examples

Run this code
spc <- spc.bin (flu, 5)

 plot (flu[1,,425:475])
 plot (spc[1,,425:475], add = TRUE, col = "blue")

 nwl (flu)
 nwl (spc)

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