Re: Re: pushing into arrays of arrays

Thanks for that, it helped a lot; but I'm in a bit of a confused pickle.

I'm using GD::Graph to draw some graphs. GD::Graph expects the data in the form;

@graphdata=([@array_of_xlabels],[@dataset],[@dataset],other datasets..
+...)
[download]

Now, I am trying to do this;


@labels=(array,of,labels)

loop
    loop
        build @dataset
    end loop
    push(@sets,[@dataset])
end loop

foreach $se (@sets)
    @set=$#{$se}
    ((some processing))
    push(@fixed,[@set])
end foreach

push(@graphdata,[@labels])

foreach $fi (@fixed)
    @fixd=$#{$fi}
    push(@graphdata,[@fixd])
end foreach
[download]

with the aim of ending up with @graphdata looking exactly the same as if I had done;

@graphdata=([@labels],[@dataset],[@dataset2])
[download]

so, pointers and references and whatnots all over the shop, and I'm getting confused.....

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Re: Re: Re: pushing into arrays of arrays by Tomte (Priest) on Mar 05, 2004 at 15:50 UTC
If I'm not mistaken (I didn't run any code), you are pushing lists with one element (namely the bigest index of the list you IMO intend to push) onto `@fixed`. After that you push a lot of arrays containing only `1` (that is: `(1,)`) onto `@graphdata`. please `use strict`! try something like this, take the time to notice the differences between your example and this one: `use strict; my @labels = qw(my one word labels); my @graphdata = (\@labels); my @sets = (); # looping and data building, fillings @sets foreach my $set (@sets) { my $se = []; # process $set into $se push @graphdata, $se; } my $graph; # GD::Graph stuff my $gd = $graph->plot(\@graphdata);` [download] Try to understand what you are doing, read a lot, debug your code (e.g. use Data::Dumper), read perldata and perlref thoroughly ;-) regards, tomte Hlade's Law: If you have a difficult task, give it to a lazy person -- they will find an easier way to do it.	[reply] [d/l]

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Re: Re: Re: pushing into arrays of arrays
by Tomte (Priest) on Mar 05, 2004 at 15:50 UTC

If I'm not mistaken (I didn't run any code), you are pushing lists with one element (namely the bigest index of the list you IMO intend to push) onto @fixed.

After that you push a lot of arrays containing only 1 (that is: (1,)) onto @graphdata.

please use strict!

try something like this, take the time to notice the differences between your example and this one:

use strict;

my @labels = qw(my one word labels);

my @graphdata = (\@labels);

my @sets = ();

# looping and data building, fillings @sets

foreach my $set (@sets) {
     my $se = [];
     # process $set into $se
     push @graphdata, $se;
}

my $graph; 
# GD::Graph stuff
my $gd = $graph->plot(\@graphdata);
[download]

Try to understand what you are doing, read a lot, debug your code (e.g. use Data::Dumper), read perldata and perlref thoroughly ;-)

regards,
tomte

Hlade's Law:

If you have a difficult task, give it to a lazy person --
they will find an easier way to do it.

[reply]
[d/l]