sticks and baseline

[JimmyS]

Hi.

I'm trying to plot a curve using sticks and setting the baseline.

If I add 3 data points (1,5), (2,-5), (3,15) with baseline 0.0 I get 3 sticks drawn but they are between 0->5, 5->-5 and -5->15.

If I change the baseline to 3.0 I get the 3 sticks 3->5, 5->-5 and -5->15. So the baseline only changes the first stick.

Am I misunderstanding how it should work? I was expecting the 3 sticks to show (0->5), (0->-5) and (0,15). (Which is the behaviour I see in the example.)

Thanks.

[Uwe]

If I change the baseline to 3.0 I get the 3 sticks 3->5, 5->-5 and -5->15. So the baseline only changes the first stick.

The result has to be: 3->5, 3->-5, 3->15.

Uwe

[JimmyS]

Hi Uwe,

that's what I was expecting, but not what I'm seeing.

I'll see if I can find anything odd in my code compared to the example. Not sure if I have the qwt source on my kubuntu machine, but I'll grab it if I have to.

Regards,

Jimmy

[JimmyS]

Hi, Uwe.

I found my problem - I managed to duplicate x co-ords in my data, so at each x value I had two sticks being drawn, one with the correct y value and one with the previous y value.

Works perfectly now.

Jimmy