pwelch | R Documentation |
pwelch
is for single signal trace only; mv_pwelch
is for multiple traces. Currently mv_pwelch
is experimental and
should not be called directly.
pwelch(
x,
fs,
window = 64,
noverlap = window/2,
nfft = "auto",
window_family = hamming,
col = "black",
xlim = NULL,
ylim = NULL,
main = "Welch periodogram",
plot = 0,
log = c("xy", "", "x", "y"),
...
)
## S3 method for class ''ravetools-pwelch''
print(x, ...)
## S3 method for class ''ravetools-pwelch''
plot(
x,
log = c("xy", "x", "y", ""),
se = FALSE,
xticks,
type = "l",
add = FALSE,
col = graphics::par("fg"),
col.se = "orange",
alpha.se = 0.5,
lty = 1,
lwd = 1,
cex = 1,
las = 1,
main = "Welch periodogram",
xlab,
ylab,
xlim = NULL,
ylim = NULL,
xaxs = "i",
yaxs = "i",
xline = 1.2 * cex,
yline = 2 * cex,
mar = c(2.6, 3.8, 2.1, 0.6) * (0.5 + cex/2),
mgp = cex * c(2, 0.5, 0),
tck = -0.02 * cex,
grid = TRUE,
...
)
mv_pwelch(
x,
margin,
fs,
window = 64,
noverlap = window/2,
nfft = "auto",
window_family = hamming
)
x |
numerical vector or a row-major vector, signals.
If |
fs |
sample rate, average number of time points per second |
window |
window length in time points, default size is |
noverlap |
overlap between two adjacent windows, measured in time
points; default is half of the |
nfft |
number of points in window function; default is automatically determined from input data and window, scaled up to the nearest power of 2 |
window_family |
function generator for generating filter windows,
default is |
col , xlim , ylim , main , type , cex , las , xlab , ylab , lty , lwd , xaxs , yaxs , mar , mgp , tck |
parameters passed to |
plot |
integer, whether to plot the result or not; choices are |
log |
indicates which axis should be |
... |
will be passed to |
se |
logical or a positive number indicating whether to plot standard error of mean; default is false. If provided with a number, then a multiple of standard error will be drawn. This option is only available when power is in log-scale (decibel unit) |
xticks |
ticks to show on frequency axis |
add |
logical, whether the plot should be added to existing canvas |
col.se , alpha.se |
controls the color and opacity of the standard error |
xline , yline |
controls how close the axis labels to the corresponding axes |
grid |
whether to draw rectangular grid lines to the plot; only
respected when |
margin |
the margin in which |
A list with class 'ravetools-pwelch'
that contains the
following items:
freq
frequencies used to calculate the 'periodogram'
spec
resulting spectral power for each frequency
window
window function (in numerical vector) used
noverlap
number of overlapping time-points between two adjacent windows
nfft
number of basis functions
fs
sample rate
x_len
input signal length
method
a character string 'Welch'
x <- rnorm(1000)
pwel <- pwelch(x, 100)
pwel
plot(pwel, log = "xy")
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