Gnuplot: How to plot bash array without dumping it to a file

KamilCuk 2019-11-30 06:47

bash array

myarray=$(seq 1 5)

The myarray is not a bash array, it is a normal variable.

The easiest is to put the data to stdin and plot <cat.

seq 5 | gnuplot -p -e 'plot "<cat" w l'

Or with your variable and with using a here-string:

<<<"$myarray" gnuplot -p -e 'plot "<cat" w l'

Or with your variable with redirection with echo or printf:

printf "%s\n" "$myarray" | gnuplot -p -e 'plot "<cat" w l'

And if you want to plot an actual array, just print it on separate lines and then pipe to gnuplot

array=($(seq 5))
printf "%s\n" "${array[@]}" | gnuplot -p -e 'plot "<cat" w l'

Navaro 2019-11-30 07:07:52

or echo $myarray | tr " " "\n" | gnuplot -p -e 'plot "<cat" w l'

techno 2020-02-02 21:59:05

Avoid useless use of cat! Use STDIN instead, see my answer

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