hyperSpec (version 0.98-20140523)

seq.hyperSpec: Sequence generation along spectra or wavelengths This function generates sequences along the spectra (rows) or wavelengths of hyperSpec objects.

Description

Note that wl2i generates sequences of indices along the wavelength axis.

Usage

## S3 method for class 'hyperSpec':
seq(x, from = 1, to = nrow(x), ...,
    index = FALSE, short = "seq", user = NULL, date = NULL)

Arguments

x

the hyperSpec object

from,to

arguments handed to seq.int

...

arguments for seq, namely by, length.out

index

should a vector with indices be returned rather than a hyperSpec object?

short,user,date

handed to logentry.

Value

• a numeric or hyperSpec object, depending on index.

code

length

Details

seq had to be implemented as S3 method as the generic has only ...

See Also

wl2i to construct sequences of wavelength indices.

seq

Examples

seq (flu, index = TRUE)
seq_along (flu)
seq (flu, length.out = 3, index = TRUE) # return value is numeric, not integer!
seq (flu, by = 2, index = TRUE) 		    # return value is numeric, not integer!

plot (flu, col = "darkgray")
plot (seq (flu, by = 2), add = TRUE, col= "red")
plot (seq (flu, length.out = 2), add = TRUE, col= "blue")