Thank's for your answer but the pause 30 reread replot line's should make gnuplot update automatically.If I put the data in a separate file, say run.gp.And change the child section to code

exec("gnuplot /home/philip/Desktop/PERLBITCOIN/run.gp");
exit;

[download]

It will run gnuplot and it updates.Gnuplot will not reread and replot if I use the data section instead of the separate file.This is just for interests sake, is there some sort of block on the gnuplot process by using open rather than by exec.

In reply to Re^2: fork spawn write background problem by grasshopper!!!
in thread fork spawn write background problem by grasshopper!!!

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