Re: [Rd] Improved LP/MIP solver

2021-12-12 Thread Avraham Adler
On Sun, Dec 12, 2021 at 4:24 PM Avraham Adler wrote: > > On Sun, Dec 12, 2021 at 3:44 PM Julian Hall wrote: > > > > Dear All, > > > > I am leading the development of HiGHS, which is now the top performing open > > source linear optimization software on the industry standard benchmarks. In > > p

Re: [Rd] Improved LP/MIP solver

2021-12-12 Thread Avraham Adler
On Sun, Dec 12, 2021 at 3:44 PM Julian Hall wrote: > > Dear All, > > I am leading the development of HiGHS, which is now the top performing open > source linear optimization software on the industry standard benchmarks. In > particular, our MIP solver out-performs SCIP, and is way ahead of the C

[Rd] Improved LP/MIP solver

2021-12-12 Thread Julian Hall
Dear All, I am leading the development of HiGHS, which is now the top performing open source linear optimization software on the industry standard benchmarks. In particular, our MIP solver out-performs SCIP, and is way ahead of the COIN-OR solver Cbc. HiGHS solves LPs via simplex or interior p

Re: [Rd] string concatenation operator (revisited)

2021-12-12 Thread Bob Rudis
FWIW {stringi} has %+% for this functionality (and I occasionally use it), tho I do enough processing of quite ughly string content that I pretty much always have {stringi} loaded. That may not be true for many other folks. On Fri, Dec 10, 2021 at 2:07 PM Grant McDermott wrote: > > Sorry I haven'