R help - Apr 2017 - Looking for

Dear all,
  For a piecewise function F similar to the attached graph, I would like to
find
                                        inf{x| F(x) >=0}.


 I tried to uniroot. It does not seem to work. Any suggestions?
 Thank you very much!!
    Hanna
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Details matter!

1. Are the points of discontinuity known? This is critical.

2. Can we assume monotonic increasing, as is shown?


-- Bert




Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Sun, Apr 9, 2017 at 1:28 PM, li li <hannah.hlx at gmail.com>
wrote:
> Dear all,
>   For a piecewise function F similar to the attached graph, I would like to
> find
>                                         inf{x| F(x) >=0}.
>
>
>  I tried to uniroot. It does not seem to work. Any suggestions?
>  Thank you very much!!
>     Hanna
>
> ______________________________________________
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