- wave
an R object.
- f
sampling frequency of wave
(in Hz). Does not need to
be specified if embedded in wave
.
- channel
channel of the R object, by default left channel (1).
- wl
window length for the analysis
(even number of points). (by default = 512)
- zp
zero-padding (even number of points), see Details
.
- ovlp
overlap between two successive windows (in %).
- fftw
if TRUE
calls the function FFT
of the
library fftw
. See Notes of the spectro
.
- dB
a character string specifying the type dB to return: "max0" for a
maximum dB value at 0, "A", "B", "C", "D", and "ITU" for common dB weights.
- dBref
a dB reference value when dB
is TRUE
. NULL
by default
but should be set to 2*10e-5 for a 20 microPa reference.
- wn
window name, see ftwindow
(by default "hanning"
).
- x
a matrix if wave
is not provided.
- hoff
horizontal 'offset' which shifts actual x-values slightly
per row for visibility. Fractional parts will be removed.
- voff
vertical 'offset' which separates traces.
- col
a color or a color palette function to be used to assign colors in
the plot
- xlab
title of the frequency x-axis.
- ylab
title of the amplitude y-axis.
- xaxis
a logical, if TRUE
adds the frequency x-axis
according to f
.
- yaxis
a logical, if TRUE
adds the amplitude y-axis
according.
- density
argument of polygon
:
the density of shading lines, in lines per inch. The default
value of 'NULL' means that no shading lines are drawn. A zero
value of 'density' means no shading nor filling whereas
negative values (and 'NA') suppress shading (and so allow
color filling).
- border
argument of polygon
:
the color to draw the border. The default, 'NULL', means to
use 'par("fg")'. Use 'border = NA' to omit borders.
- lines
a logical, if TRUE
plots lines instead of surfaces
(polygons).
- lwd
line width.
- ...
other graphical arguments to passed to plot