it's my fault. I should describe it more clearly.

I know where is the problem.

I parse a text and want to get identical words and its times. So I have a hash: key is "identical words" and value is "times".

I hope I could draw a lines picture (x-axis is identical word and y-axis is times). In other words, "times" is data argument and "identical words" is chxl argument in URI::GoogleChart.

    my ($x, @y);
    $x="0:";
    foreach (sort { $word2_hash{$b} <=> $word2_hash{$a} or $a cmp $b} 
+keys %word2_hash) {
        
        
        $x .= "|$_"; #add identical words
        push @y, $word2_hash{$_}; #add times 
        
    }


    my $chart = URI::GoogleChart->new("lines", 400, 150,
                data => \@y,#it is OK to parse array_ref
                range_show => "left",
                range_round => 1,
                color => ["red"],
                chxl => "$x", #
                chxt => "x",
                );
    #getstore($chart, "chart.png");
    #print "get pic\n";
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<Sorry for my wrong post. It could work if use array_ref/p>

I find where is my problem. The chxl seems have limit. If I decrease the identical words. I can get the picture. If I use a lot of identical words, I couldn't get the picture.

Thanks for all your reply.