NAME

       prefield -  prepare input file for 'muplot' to plot 2-d fields by arrows

SYNOPSIS

       prefield <file> <scale> x y F_x F_y

DESCRIPTION

       prefield will prepare input file for 'muplot' to plot 2-d fields by arrows

       Example:

       On  running  "prefield test.dat 20 1 2 5 6" the source file 'test.dat' will be read, and a
       field-data file will be produced  with  the  1st  and  2nd  columns  being  the  x  and  y
       space-positions  like  in  the  source file, whereas the fields F_x and F_y are calculated
       from the values in the 5th and 6th columns of the source data  multiplied  by  the  second
       command line option, which means in this example a 20-fold magnification.

       Use '-' as file name to read from <stdin> and write to <stdout>.

COPYRIGHT

       Copyright © 1997, 2001, 2005, 2007, 2009, 2011-2012 Dimitar Ivanov

       License: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
       This  is free software: you are free to change and redistribute it.  There is NO WARRANTY,
       to the extent permitted by law.