DOUBLE

Section: User Commands (1)
Updated: 22 February 1989
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NAME

double - filter for converting and editing double precision data  

SYNOPSIS

double [-option [value]] ...  

DESCRIPTION

double copies double precision data from the standard input to the standard output. The user can specify optional scaling, editing and merging of additional data from specified files.

If you specify more than one operation on the command line, they will be applied in the following order. See `OPTIONS' for a more complete description of these. The specified offset number of values are skipped. While there is still data on the standard input one value is read. One value from the add file is read and added to the value if present. One value from the mult file is read and the value is multiplied by it if present. The value is multiplied by the scale value if present. The baseline value, if present, is added to the value. The value is writen to the standard output. One value is read from the join file if present and written to the standard output. Last, count values in the standard input are skipped.

The user can achieve an arbitrary order by implementing each operation as a single invocation of double in a multiple stage pipline.  

OPTIONS

bi
the input contains binary (unformatted double precision) data.
bo
the output will contain binary (unformatted double precision) data.
add FILE
add the next input value from FILE to each output value.
baseline DOUBLE
add DOUBLE to each output value (default 0.0).
copy INTEGER
copy INTEGER values to the output each time around (default 1).
join FILE

 merge one value from FILE into output with each other output value.
mult FILE
file - multiply each output value with the next value from FILE.
offset INTEGER
skip INTEGER values from the beginning of the the input file before beginning to copy (default 0).
scale DOUBLE
scale every output value by DOUBLE (default 1.0).
skip INTEGER
skip INTEGER values after copying each cycle(default 0).
 

EXAMPLES

      vector scalar product bvec[i] = 5.0 * avec[i]:
      double -scale 5.0 <avec >bvec

      vector addition cvec[i] = avec[i] + bvec[i]:
      double -add avec <bvec >cvec

      vector multiplication cvec[i] = avec[i] * bvec[i]:
      double -mult avec <bvec >cvec
      
      vector editing:
      bvec[i] = avec[2i]
      double -skip 1 <avec >bvec

      bvec[i] = avec[i+5]
      double -offset 5 <avec >bvec

      bvec[i] = avec[2i]
      bvec[i+1] = avec[2i+1]
      double -copy 2 -skip 2 <avec >bvec
 

SEE ALSO

csh(1), sh(1)  

BUGS

This is virtually untested and still undergoing developmental changes. Please mail any bugs reports or comments to rich@rice.edu, and I'll provide support if I can.

 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
SEE ALSO
BUGS
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