Just taking a stab in the dark, I'm thinking that this:

push @{$plotx{$ii}}, $fnfeld[$xfeld[$i]]->{'fn'};

possibly should be this instead:

push @{$plotx{$ii}}, @{$fnfeld[$xfeld[$i]]->{'fn'}};

But the whole thing seems needlessly complicated. Agree with thanos that it would help if we could see more of your program, particularly the call to Gnuplot.

In reply to Re: question to a complex structure of hash/array by Anonymous Monk
in thread question to a complex structure of hash/array by buchi2

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