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Reading Data from Pipe and File

For the later described combination of the tools it is often very useful to read some data from pipe and add other sets from file. Therfore an additional flag -pipe is needed in the command line to force the tool to read in from pipe as well. Similar to the -pipe option is the +pipe option, but while-pipe reads the data from standard out before the data from file, +pipe reads the data after evaluating the files.


        gr_spline -f test.dat -n 80 | gr_copy -pipe -f test.dat

The output will contain both, a splined version of test.dat and the original data.

Jens Trapp
Wed Jun 12 20:34:13 MET DST 1996