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up vote 2 down vote favorite

I want to do something like:

echo "p 'myfile.txt' u 1:(exp($2))" | gnuplot -p

but need the shell to pass the $2 as a literal into gnuplot.

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1 Answer

up vote 1 down vote

Change your quoting around so that instead of double quotes (") use single quotes (') to wrap the entire argument to echo and use double quotes around the filename, like so:

$ echo 'p "myfile.txt" u 1:(exp($2))' | gnuplot -p

Example

Make some fake data:

$ for i in `seq 1 10`;do echo -e "$i\t$i";done > myfile.txt

Results in this:

1   1
2   2
3   3
4   4
5   5
6   6
7   7
8   8
9   9
10  10

Running the command, produces this graph:

$ echo 'p "myfile.txt" u 1:(exp($2))' | gnuplot -p

   ss of gnuplot graph

References

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