qwtplot curve orientation problem

**tangtao_xp** · 27th April 2013, 04:03

I am a newbie to Qwt, for some reasons, I had to use it to draw some tech-plot. However, as far as I know, qwtplot can only plot curve from the left to the right or, the right to the left. In my situation, I need a curve in the direction from the top to the bottom which is shown below. Could anyone give me some tips? Thank you in advance.

17_126685_0e5452cae4127d4.jpg

**Uwe** · 27th April 2013, 10:26

Originally Posted by tangtao_xp

However, as far as I know, qwtplot can only plot curve from the left to the right or, the right to the left.

No a curve displays points as they are - for a series with monotonic increasing/decreasing y coordinates it will look like in your screenshot.

Uwe

**tangtao_xp** · 27th April 2013, 15:27

Hi, Uwe

Thank you for your helpful suggestion.

I found my mistake: qwt examples only providing left-to-right plot and gives me a strong impression of that.
I should not judge things only by imagination.

Thank you again, Uwe. And I appreciate it.

Tang Tao