sinusoid {season}

Plot a Sinusoid

Description

Plots a sinusoid over 0 to 2\pi.

Usage

sinusoid(amplitude, frequency, phase, ...)

Arguments

amplitude

the amplitude of the sinsuoid (its maximum value).

frequency

the frequency of the sinusoid in 0 to 2\pi (number of cycles).

phase

the phase of the sinusoid (location of the peak).

...

additional arguments passed to the plot.

Details

Sinusoidal curves are useful for modelling seasonal data. A sinusoid is plotted using the equation: A\cos(ft-P), t=0,\ldots,2 \pi, where A is the amplitude, f is the frequency, t is time and P is the phase.

Author(s)

Adrian Barnett [e-mail]

References

Barnett, A.G., Dobson, A.J. (2010) Analysing Seasonal Health Data. Springer.

Examples

sinusoid(amplitude=1, frequency=1, phase=1)