I would like to plot directly from other program stdout. I have found - should be applied to signal data is piped; but how to do that?
./DVM -l 1 -O 1 | gnuplot -p
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2 Answers
I have no idea what ./DVM will produce, but if it is emitting gnuplot commands that should work as shown. If it is emitting only data values then you still need a source of gnuplot commands from somewhere, maybe as part of the gnuplot command, maybe from a separate file. That may be the mechanism referred to by your previous advice "- should be applied". For example to execute a simple gnuplot command that plots input [x,y] values:
yourcommand | gnuplot -p -e "plot '-' with lines"
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If I understand correctly you have script that is generating some output that you want to use in your plot like:
$ ls
script.sh
$ cat script.sh
#! /bin/bash
echo "1 1"
echo "2 3"
echo "5 5"
You can pass its output as a data to gnuplot with command:
./script.sh | gnuplot -p -e "plot '<cat' w l"
Edit: After taking a look in Ethan's answer I realised that you can use '-' insteal of '<cat'.
The output will look like:
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