search for: dynvec

A small number of columns in the data I need to work with are strings, the rest numbers. I'm using read_excel() from the readxl package to get the data ; right after it, the string columns are of type chr and the rest num. I'm tasked with finding out which columns are integers. From an advice, I tried saving the spreadsheet content into a CSV then loading that, which works like a charm ;

I'm tasked to read a table from an excel file and it doesn't mention which method to use. I went back some lessons ago and the 5 years old lesson mentioned to pick a package using the highest score the way of the attached (screenshot). Since there's no requirement of a method to read Excel files, I'd rather use the least error-prone one; what would that be? eg will try multiple

Is there a way to get a copy of a matrix only for TRUE entries of a matching size boolean matrix? For *example*: > mat_letters <- matrix(data=c('A', 'B', 'C', 'D'), ncol=2, byrow=TRUE) > mat_letters [,1] [,2] [1,] "A" "B" [2,] "C" "D" > mat_bools <- matrix(data=c(FALSE, TRUE, TRUE, FALSE), ncol=2,

It's exactly what I was looking for, thanks. I'm replying to the whole list so others can skip this question, to not waste time on it. Bonne fin de journ?e de Montr?al (nous sommes le matin ici) On Fri, May 3, 2024 at 10:30?AM Marc Girondot <marc_grt at yahoo.fr> wrote: > Is it what you want ? > mat_letters <- matrix(data=c('A', 'B', 'C',