phonTools (version 0.1-6)

windowfunc: Window Function

Description

Generates a window function of a given type and of a given length.

Usage

windowfunc (npoints = 100, type = '', parameter = -1)

Arguments

npoints

The desired window length, in points.

type

A string indicating the type of window desired. For the sake of simplicity, all window names are in lowercase. Supported types are: rectangular, hann, hamming, cosine, bartlett, gausian, and kaiser.

parameter

The parameter necessary to generate the window, if appropriate. At the moment, the only windows that require parameters are the Kaiser and Gaussian windows. By default, these are set to 4 for kaiser and -.4 for gaussian windows.

Details

A window function is generated, of the type and length specified by the user. This is returned as a numeric vector.

References

http://en.wikipedia.org/wiki/Window_function

Examples

par (mfrow = c(1,4))
plot (windowfunc ('hann'))
plot (windowfunc ('bartlett'))
plot (windowfunc ('kaiser', parameter = 2))
plot (windowfunc ('kaiser', parameter = 6))