Adding vertical and horizontal lines in 2D plots

[Michael Wesoly]

Hello together!

First of all, amazing good library! Just started to use it three days ago and it does all what i need. almost all ;) that's why i have a question:
How can i draw vertical and horizontal lines in an 2d plot the easiest way? I need these to show some limits, and want them to draw through the whole 2D plot (from one axis to the other one) Is there a curve plotting fuction, where i can just say y=100 or x=200 to get these lines?

I looked quite a bit but didn't find some special function for that.

Thank you already so much for the help!

[Helmut Michels]

Hi,

the easiest way to draw single lines in an axis system is to use the routine rline.

For example:

                    rline (x, y1, x, y2)   plots a vertical line

                    rline (x1, y, x2, y)   plots a horizontal line

There are no special routines for just plotting vertical or horizontal lines, but the line

algorithm switches internally to  a faster algorithm if a vertical or horizontal line is

detected.

With best regards,

Helmut

[Michael Wesoly]

Hello Helmut,

thank you for the answer! That is helping me very much and i get the needed results easily.
I will try more stuff with this library in the near future and most probably come back with more questions.

until then, with best regards

Michael