Read an .Rda file as saved during data acquisition and plot it, possibly first trimming the range of wavelengths and/or smoothing the spectral data.
plot_spct_file(file, range = NULL, method = NULL, strength = 0, na.rm = FALSE)a (readable binary-mode) connection or a character string giving the name of the file to load (when tilde expansion is done).
a numeric vector of length two, or any other object for which function range() will return two.
a character string "custom", "lowess", "supsmu".
numeric value to adjust the degree of smoothing.
a logical value indicating whether NA values should be stripped before the computation proceeds.
If the argument passed to method is of length 2, the first
member will apply to source_spct objects and the second one to
filter_spct and reflector_spct objects. A numeric vector
of length 2 passed to strength is treated in the same way. This
is only relevant when we are collecting spectra belonging to different
classes and need to treat them differently with respect to smoohting. It
also allows different defaults, as transmittance spectra tend to lack
the fine structure of some emission spectra.
Function trim_wl is used to trim the
range of the data to plot, and function
smooth_spct is used for smoothing, and
prameters range, and strength and method are passed to
them, respectively.
Other functions for importing spectral data from files:
collect_spct_files(),
map_oofile_header_rows(),
oofile_data_rows(),
read_files2mspct(),
read_oo_data(),
read_oo_ovdata(),
read_oo_pidata(),
read_oo_ssdata(),
set_oo_ssdata_descriptor(),
set_oo_ssdata_settings()