chan_mult factor num_columns column [column column...] < infile > outfile
chan_add value num_columns column [column column...] < infile > outfile
Mult_chan will multiply all numbers in the specified columns by the given factor. The infile is an ASCII file, with columns separated by white space. The columns are numbered from 0 to (n-1). Add_chan behaves analogously, but with addition rather than multiplication.
These routines are useful for converting between units in animation tables.
To multiply all but the first column of a four column file by 2.54:
chan_mult 2.54 4 1 2 3
To add ten to the first six columns of an eight-column file:
chan_add 10.0 8 0 1 2 3 4 5
To convert the second of three columns from Fahrenheit to Celsius:
chan_add -32 3 1
chan_mult 0.56 3 1
The files must contain numbers and whitespaces only.
Carl J. Nuzman
This software is Copyright (c) 1994-2013 by the United States Government as represented by U.S. Army Research Laboratory.
Reports of bugs or problems should be submitted via electronic mail to <firstname.lastname@example.org>.