tomwalters@0: .TH COSINE 1 "1 September 1993"
tomwalters@0: 
tomwalters@0: .SH NAME
tomwalters@0: cosine \- generate a cosine window.
tomwalters@0: 
tomwalters@0: .SH SYNTAX 
tomwalters@0: cosine [options]
tomwalters@0: 
tomwalters@0: .SH DESCRIPTION
tomwalters@0: Generate a cosine window on the stdout in binary shorts or floats for
tomwalters@0: a given size.
tomwalters@0: 
tomwalters@0: .SH OPTIONS
tomwalters@0: 
tomwalters@0: 1. size
tomwalters@0: 
tomwalters@0: The size of the window can be given with time units (ms or s) or samples (no
tomwalters@0: units).  Time units are converted to samples using the given
tomwalters@0: `samplerate' option.
tomwalters@0: 
tomwalters@0: 2. Hamming
tomwalters@0: 
tomwalters@0: The default ("Hamming=off") is a Hann or raised cosine window:
tomwalters@0: 
tomwalters@0: .nf
tomwalters@0: 	w[n] = 0.5 [ 1 - cos( TWOPI . n/(N-1) ) ]
tomwalters@0: .fi
tomwalters@0: 
tomwalters@0: The "Hamming=on" window is:
tomwalters@0: 
tomwalters@0: .nf
tomwalters@0: 	w[n] = 0.54 - 0.46 cos( TWOPI . n/(N-1) )
tomwalters@0: .fi
tomwalters@0: 
tomwalters@0: Both windows are defined for 0 <= n <= N-1 and are assumed to be zero otherwise.
tomwalters@0: 
tomwalters@0: 3. scale
tomwalters@0: 
tomwalters@0: A scale factor for the output.
tomwalters@0: 
tomwalters@0: 4. type
tomwalters@0: 
tomwalters@0: Output datatype ("type=short" or "type=float").
tomwalters@0: 
tomwalters@0: .SH "SEE ALSO"
tomwalters@0: options gauss
tomwalters@0: 
tomwalters@0: .SH COPYRIGHT
tomwalters@0: .LP
tomwalters@0: Copyright (c) Applied Psychology Unit, Medical Research Council, 1995
tomwalters@0: .LP
tomwalters@0: Permission to use, copy, modify, and distribute this software without fee 
tomwalters@0: is hereby granted for research purposes, provided that this copyright 
tomwalters@0: notice appears in all copies and in all supporting documentation, and that 
tomwalters@0: the software is not redistributed for any fee (except for a nominal 
tomwalters@0: shipping charge). Anyone wanting to incorporate all or part of this 
tomwalters@0: software in a commercial product must obtain a license from the Medical 
tomwalters@0: Research Council.
tomwalters@0: .LP
tomwalters@0: The MRC makes no representations about the suitability of this 
tomwalters@0: software for any purpose.  It is provided "as is" without express or 
tomwalters@0: implied warranty.
tomwalters@0: .LP
tomwalters@0: THE MRC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
tomwalters@0: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 
tomwalters@0: THE A.P.U. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES 
tomwalters@0: OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
tomwalters@0: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 
tomwalters@0: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 
tomwalters@0: SOFTWARE.
tomwalters@0: