new. The
hyperSpec object is then initialized using the given parameters.If option gc is TRUE, the initialization will have frequent
calls to gc () which can help to avoid swapping or running out of
memory.
# S4 method for hyperSpec
initialize(.Object, spc = NULL, data = NULL,
wavelength = NULL, labels = NULL)the new hyperSpec object.
the spectra matrix.
spc does not need to be a matrix, it is converted explicitly by
I (as.matrix (spc)).
data.frame, possibly with the spectra in
data$spc, and further variates in more columns. A matrix can be
entered as one column of a data frame by: data.frame (spc =
I (as.matrix (spc))).
However, it will usually be more convenient if the spectra are given in
spc
The wavelengths corresponding to the columns of
data. If no wavelengths are given, an appropriate vector is
derived from the column names of data$spc. If this is not
possible, 1 : ncol (data$spc) is used instead.
A list containing the labels for the columns of the
data slot of the hyperSpec object and for the wavelength
(in label$.wavelength). The labels should be given in a form ready
for the text-drawing functions (see plotmath).
If label is not given, a list containing NULL for each of the
columns ofdata and wavelength is used.
new for more information on creating and
initializing S4 objects.
plotmath on expressions for math annotations as
for slot label.
# NOT RUN {
new ("hyperSpec")
spc <- matrix (rnorm (12), ncol = 4)
new ("hyperSpec", spc = spc)
new ("hyperSpec", data = data.frame (x = letters[1:3]),
spc = spc)
colnames (spc) <- 600:603
new ("hyperSpec", spc = spc) # wavelength taken from colnames (spc)
# given wavelengths precede over colnames of spc
new ("hyperSpec", spc = spc, wavelength = 700:703)
# specifying labels
h <- new ("hyperSpec", spc = spc, data = data.frame (pos = 1 : 3),
label = list (spc = "I / a.u.",
.wavelength = expression (tilde (nu) / cm^-1),
pos = expression ("/" (x, mu*m)))
)
plot (h)
plotc (h, spc ~ pos)
# }
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