Re: [Matplotlib-users] Vertical lines

[Stephen W. <ste...@cs...>]

Nils Wagner wrote:

> How can I add vertical/horizontal  lines (x=constant, y=constant 
> respectively) to an existing plot with matplotlib ? 

I've always done something like:

plot(x,y)
a=axis()
plot(a[0:2],[50,50],'k')

for example, to get a line at y=50.  If there's something shorter I'm 
open to suggestions.