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hyperSpec (version 0.98-20140523)

spc.bin: Wavelength Binning 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.

Description

The mean of every by data points in the spectra is calculated.

Usage

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

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

if

Value

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

item

  • ...
  • short,user,date

Details

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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