Can't execute shell commands from gnuplot

Question

I'm trying to execute some commands from inside gnuplot, but I'm getting error. As far as I understand I should use "!" before command. Here is my script:

echo "
set terminal dumb 
!OUT=$(adb shell dumpsys meminfo $PID | grep TOTAL )
!OUT=$(echo $OUT | sed -r 's/ +/ /g' | cut -d ' ' -f 2-)
!echo $OUT >> adbmon.log
plot  'adbmon.log' using 1:6 title 'Free'
" > sample.gp && gnuplot sample.gp

What am I doing wrong? Thank you for your time!

It would help if you show the error. I have no clue what you are actually trying here, seems so much more complicated than needed. — Bernhard
– Bernhard, Commented Dec 19, 2013 at 16:11

Christoph · Accepted Answer · 2013-12-22 11:51:26Z

1

For every ! a new shell is spawned, so that the variable $OUT is not available in the second call. You can also plot everything on-the-fly as follows:

gnuplot -persist -e "set terminal dumb; plot '< adb shell dumpsys meminfo $PID | grep TOTAL | sed -r ''s/ +/ /g'' | cut -d '' '' -f 2-' using 1:6"

answered Dec 22, 2013 at 11:51

Christoph

48.7k8 gold badges94 silver badges198 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

somerandomusername Over a year ago

In this case I didn't escape $ so command was completely useless.

Christoph Over a year ago

And if you escape the $ it works? Would surprise me.

somerandomusername Over a year ago

I completely remade structure of this code, writing data to adbmon.log in different process. But thank you for your help I will keep in mind next time I use gnuplot

Collectives™ on Stack Overflow

Can't execute shell commands from gnuplot

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related