Are you sure this is trivial? I have the impression the combination of an ill-posed problem and digital representation of numbers might just create the illusion that is so.
B. > On Apr 10, 2017, at 12:34 AM, Bert Gunter <bgunter.4...@gmail.com> wrote: > > Then it's trivial. Check values at the discontinuities and find the > first where it's <0 at the left discontinuity and >0 at the right, if > such exists. Then just use zero finding on that interval (or fit a > line if everything's linear). If none exists, then just find the first > discontinuity where it's > 0. > > Cheers, > 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 5:38 PM, li li <hannah....@gmail.com> wrote: >> Hi Burt, >> Yes, the function is monotone increasing and points of discontinuity are >> all known. >> They are all numbers between 0 and 1. Thanks very much! >> Hanna >> >> >> 2017-04-09 16:55 GMT-04:00 Bert Gunter <bgunter.4...@gmail.com>: >>> >>> 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....@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 >>>> >>>> ______________________________________________ >>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>>> https://stat.ethz.ch/mailman/listinfo/r-help >>>> PLEASE do read the posting guide >>>> http://www.R-project.org/posting-guide.html >>>> and provide commented, minimal, self-contained, reproducible code. >> >> > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.