GnuPlot plot2d plots only last pushed value to the dataset object array.!!?

goutham has asked for the wisdom of the Perl Monks concerning the following question:

 my @y=(1..11);
for ($ia=0;$ia<$text;$ia++)
{
@tempa=splice(@rfevma2437,0,11);
$datasets[$ia]=Chart::Gnuplot::DataSet->new(
 xdata=>\@y,
 ydata=>\@tempa,
  style=>"lines",
  title => $sln[$ia],
 );
 print "$datasets[$ia]\n";
push @temp1,$datasets[$ia];
}
$rfevmchart->plot2d(@temp1);
[download]

Even though I am passing values to dataset objects of a GNUPlot through the for loop, I am able to plot only the last pushed value using plot2d. What can be the reason? Please do help. I am new to perl.

Comment on GnuPlot plot2d plots only last pushed value to the dataset object array.!!? Download Code

Replies are listed 'Best First'.
Re: GnuPlot plot2d plots only last pushed value to the dataset object array.!!? by hippo (Archbishop) on Jun 16, 2015 at 15:13 UTC
Just a guess, but does it improve matters if you declare `@tempa` as `my` inside the loop? eg. `my @tempa=splice(@rfevma2437,0,11);` If `@tempa` is not local to the loop it doesn't go out of scope and so your references to it may be being overwritten each time through the loop. (Added note: Even if this doesn't fix the problem, it's still good practice to limit the scope of such variables. I'd also suggest calling it something slightly more meaningful like `@yvals` perhaps.)	[reply] [d/l] [select]
Re^2: GnuPlot plot2d plots only last pushed value to the dataset object array.!!? by goutham (Initiate) on Jun 16, 2015 at 15:26 UTC
Thanks a Ton Man.. I wasted a whole day with this error. It worked. Thanks a lot. and sure, i will make sure i ll limit the scope of such variables.	[reply]