[R-sig-teaching] graphing inequalities (intervals) in one varible

[Gabor Grothendieck]

On Wed, May 8, 2013 at 7:10 AM, Yahoo! <aboueiss at yahoo.com> wrote:
> Dear All:
>
> It seems a very silly question. But I never tried it before. I am teaching a college algebra class this summer.
>
> I need some help with graphing intervals on the real line. For examples:
>
> {x | -7<= x < 5 and x > 7}
>
> {x | x > 3}
>
> etc...
>
>

Check out the intervals packages:

library(intervals)
example(plot.Intervals)

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