Hey, I also need the exactly same thing. so I tried your sample. I think, the sample also doesn't start from 0 (Y axis), just it looks like it due to 100 data. The interval between ticks is a very small, it look like none but actually there is. You can reduce the data by changing from: my @x = map {$_ * 3 * PI/100} (0 .. 100); To: my @x = map {$_ * 3 * PI/100} (0 .. 10); You will see it also has the space before drawing the line. Thanks,