sinusoid: Create Sinusoids
In phonTools: Tools for Phonetic and Acoustic Analyses

Description Usage Arguments Details Value Author(s) Examples

Create and display one or more sinusoids.

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sinusoid (freqs, amps = rep(1, length(freqs)), dur = 50, 
phases = rep(0, length(freqs)), fs = 10000, sum = FALSE, 
show = FALSE, colors = NULL)

`freqs`	A vector of frequencies, one for each desired sinusoid.
`amps`	A vector of peak amplitudes, one for each desired sinusoid.
`dur`	The desired duration of the sinusoids, in milliseconds.
`phases`	A vector of initial phases, one for each desired sinusoid, expressed in radians.
`fs`	The desired sampling frequency of the sinusoids.
`sum`	If TRUE, the sum the generated sinusoids is also found.
`show`	If TRUE, the generated sinusoids are plotted. If sum is TRUE, a second plot is created to display the sum of the sinusoids.
`colors`	An optional vector of colors used to plot the individual sinusoids. If the number of colors given is less than the number of frequencies specified, the colors are repeated.

A number of sinusoids are generated, and optionally plotted and/or returned. The number of frequencies specified must equal the number of amplitudes and initial phases.

A dataframe with the following columns:

`time`	The time, in milliseconds, at which is sample is taken.
`waveN`	A series of columns, each indicating the amplitude of wave N at a given time.
`sum`	A column indicating the sum of all of the sinusoids.

Santiago Barreda <sbarreda@ucdavis.edu>

## several waves, and the sum
sum = sinusoid (freqs = c(100,200,300), amps = c(1,3,2), 
sum = TRUE, show = TRUE)

## no sum, different phase shifts
nosum = sinusoid (freqs = c(100,200,300), amps = c(1,3,2), 
phases = c(pi/2, 0, pi/4), sum = FALSE)