A bit quicker: t(pmin(t(somematrix), UB))
> On 27 May 2020, at 20:56, Bert Gunter <bgunter.4...@gmail.com> wrote: > > Jeff: Check it! > >> somematrix <- matrix(c(1,4,3,6,3,9,12,8,5,7,11,11),nrow=3,ncol=4) >> UB=c(2.5, 5.5, 8.5, 10.5) >> apply( somematrix, 2, function( x ) pmin( x, UB ) ) > [,1] [,2] [,3] [,4] > [1,] 1 2.5 2.5 2.5 > [2,] 4 3.0 5.5 5.5 > [3,] 3 8.5 5.0 8.5 > [4,] 1 6.0 10.5 7.0 > > Not what was wanted. > Am I missing something? > > 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 Wed, May 27, 2020 at 12:38 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us > <mailto:jdnew...@dcn.davis.ca.us>> > wrote: > >> Sigh. Transpose? >> >> apply( somematrix, 2, function( x ) pmin( x, UB ) ) >> >> On May 27, 2020 11:22:06 AM PDT, Bert Gunter <bgunter.4...@gmail.com> >> wrote: >>> Better, I think (no indexing): >>> >>> t(apply(somematrix,1,function(x)pmin(x,UB))) >>> >>> >>> 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 Wed, May 27, 2020 at 10:56 AM Rui Barradas <ruipbarra...@sapo.pt> >>> wrote: >>> >>>> Hello, >>>> >>>> Try pmin. And loop by column/UB index with sapply/seq_along. >>>> >>>> >>>> sapply(seq_along(UB), function(i) pmin(UB[i], somematrix[,i])) >>>> # [,1] [,2] [,3] [,4] >>>> #[1,] 1.0 5.5 8.5 7.0 >>>> #[2,] 2.5 3.0 8.0 10.5 >>>> #[3,] 2.5 5.5 5.0 10.5 >>>> >>>> >>>> Hope this helps, >>>> >>>> Rui Barradas >>>> >>>> >>>> Às 18:46 de 27/05/20, Michael Ashton escreveu: >>>>> Hi - >>>>> >>>>> I have a matrix of n rows and 4 columns. >>>>> >>>>> I want to cap the value in each column by a different upper bound. >>> So, >>>> suppose my matrix is >>>>> >>>>> somematrix <- matrix(c(1,4,3,6,3,9,12,8,5,7,11,11),nrow=3,ncol=4) >>>>>> somematrix >>>>> [,1] [,2] [,3] [,4] >>>>> [1,] 1 6 12 7 >>>>> [2,] 4 3 8 11 >>>>> [3,] 3 9 5 11 >>>>> >>>>> Now I want to have the maximum value in each column described by >>>>> UB=c(2.5, 5.5, 8.5, 10.5) >>>>> >>>>> So that the right answer will look like: >>>>> [,1] [,2] [,3] [,4] >>>>> [1,] 1 5.5 8.5 7 >>>>> [2,] 2.5 3 8 10.5 >>>>> [3,] 2.5 5.5 5 10.5 >>>>> >>>>> I've tried a few things, like: >>>>> newmatrix <- apply(somematrix,c(1,2),function(x) min(UB,x)) >>>>> >>>>> but I can't figure out to apply the relevant element of the UB list >>> to >>>> the right element of the matrix. When I run the above, for example, >>> it >>>> takes min(UB,x) over all UB, so I get: >>>>> >>>>> newmatrix >>>>> [,1] [,2] [,3] [,4] >>>>> [1,] 1.0 2.5 2.5 2.5 >>>>> [2,] 2.5 2.5 2.5 2.5 >>>>> [3,] 2.5 2.5 2.5 2.5 >>>>> >>>>> I'm sure there's a simple and elegant solution but I don't know >>> what it >>>> is! >>>>> >>>>> Thanks in advance, >>>>> >>>>> Mike >>>>> >>>>> Michael Ashton, CFA >>>>> Managing Principal >>>>> >>>>> Enduring Investments LLC >>>>> W: 973.457.4602 >>>>> C: 551.655.8006 >>>>> Schedule a Call: https://calendly.com/m-ashton >>>>> >>>>> >>>>> [[alternative HTML version deleted]] >>>>> >>>>> ______________________________________________ >>>>> 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. >>>> >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> 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. >> >> -- >> Sent from my phone. Please excuse my brevity. >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org <mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > <https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > <http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] ______________________________________________ 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.
