# In sage plot: fill the area under a curve between two x-values.

How do I fill the area under a curve between two $x$-values using sage plot?

For example, maybe I am using the following code:

plot(x(x-1)(x-2)+1,0,2,fill=True)

but I only want the area under the curve from x = 0.5 to x = 1.5 to be shaded in.

edit retag close merge delete

Sort by ยป oldest newest most voted

oh, okay, that makes sense, thank you!

more

If I'm understanding you correctly, then one way to do this is to take advantage of the fact you can add plots:

sage: f = x*(x-1)*(x-2)+1
sage: p = plot(f, 0.5, 1.5, fill=True) + plot(f, 0, 2)
sage: show(p)


more

Good answer. At the same time, maybe we can support this option somehow without adding plots...

( 2011-11-28 04:23:57 -0600 )edit

@kcrisman: Sure, we'd simply need to have fillxmin and fillxmax and use those instead. Right now it looks like fill is using xmin and xmax for both purposes. (You could probably achieve the same effect by playing games with the function specifications but that seemed like more work than the above..) That would be a good beginner-level ticket for someone who already knows Python.

( 2011-11-28 04:31:42 -0600 )edit

Great, file it and maybe we can get it at Sage Days 35.5!

( 2011-11-28 06:45:27 -0600 )edit
1

Did the feature get implemented? If not, how could I give it a try?

( 2013-05-16 01:25:13 -0600 )edit

Not that I know of. Since @DSM never got around to opening this (that I can tell), it's now [Trac 14599](http://trac.sagemath.org/sage_trac/ticket/14599).

( 2013-05-16 08:35:59 -0600 )edit