"Can anybody help me with this?" Probably not. Your explanation is as clear as mud -- to me anyway. Showing us the actual data or code of a simple example, what you want to do and what you have tried, and what you would like to get would likely help (assuming it's not just me being dense, always a distinct possibility!).
And please *post in **plain text** not html* to avoid opaque text formatting in this plain text list. Cheers, 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 Thu, Jun 20, 2019 at 4:50 PM Vangelis Litos <redondo5_...@hotmail.com> wrote: > I am using R and I created based on a vector x, a grid (named: plain) - > where zero is included. This gives me a 9x2 ``matrix''. > > > x_t = cbind(c(1),c(2)); > > x = t(x_t); > > > plain = expand.grid (sort (unique (c (0, x))), sort (unique (c (0, x)))); > > My aim is to focus on column 1 and take i.e the first entry (then the > second, the third entry etc through a loop) of the unique (c (0, x)) vector > (==0) [rows 1, 4 and 7] and find the maximum value (entry) in the second > column of the matrix that satisfies a condition. > > Let say that the condition is satisfied when at column 2 the value is 2. > That is I want row 7 to be selected > > Then I want to create a column vector b (9x1) that has zero everywhere > apart from row 7. > > Can anybody help me with this? > > Thank you in advance. > > [[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. > [[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.
