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            style => $args{dataset_styles}[$i] // 'linespoints',
        );
        push @datasets, $dataset;
    }
    $chart->plot2d(@datasets);

    if (defined $args{output_file}) {
        return [200];
    } else {
        require Desktop::Open;
        my $res = Desktop::Open::open_desktop("file:$outputfilename");
        if (defined $res && $res == 0) {
            return [200];
        } else {
            return [500, "Can't open $outputfilename"];
        }
    }
}

1;
# ABSTRACT: Utilities related to plotting data using gnuplot