Dear Martin, THanks for your exhortation....! THanking you, Yours sincerely, AKSHAY M KULKARNI ________________________________ From: Martin Maechler <maech...@stat.math.ethz.ch> Sent: Monday, June 19, 2023 1:15 PM To: akshay kulkarni <akshay...@hotmail.com> Cc: Bert Gunter <bgunter.4...@gmail.com>; R help Mailing list <r-help@r-project.org> Subject: Re: [R] warnng to an error....
>>>>> akshay kulkarni >>>>> on Sat, 17 Jun 2023 18:35:53 +0000 writes: > Dear Bert, Duncan's theory is working....probably the same > as yours... "theory" .. well *truth*. Note that I wrote a blog post I had hope would be read more ( --> and be cited more .. when helping peopling with such problems ;-)) Simple search ("google") for "class think R blog" or directly https://blog.r-project.org/2019/11/09/when-you-think-class.-think-again/ To say it again: Using something like if(... class(x) == "<cls>" ..) is almost always (*) bad code. Everyone should learn about inherits() and why sane R code should use that instead. --- *) It may be ok, e.g., when `x` was very expliclitly constructed in the same part of code a bit earlier Martin > THanking you, Yours sincerely, AKSHAY M KULKARNI > ________________________________ From: Bert Gunter > <bgunter.4...@gmail.com> Sent: Saturday, June 17, 2023 > 11:28 PM To: akshay kulkarni <akshay...@hotmail.com> Cc: R > help Mailing list <r-help@r-project.org> Subject: Re: [R] > warnng to an error.... > What is class(x) ?? > I think you need to (re?) learn about S3 classes, which > can in general be vectors. See ?class (the S3 portion) or > any tutorial on S3 classes in R. I have no idea what you > are trying to do, but I *suspect* it may be accomplished > through S3 inheritance rather than changing the class > vector. That is just a guess, however. > -- Bert > On Sat, Jun 17, 2023 at 10:27 AM akshay kulkarni > <akshay...@hotmail.com<mailto:akshay...@hotmail.com>> > wrote: Dear members, AN update: I have changed the if > clause to: > if(class(x)[1] == "xts") || class(x)[2] == "zoo") {code} > but am bootless..... > PLease help... > THanking you, Yours sincerely, AKSHAY M KULKARNI > ________________________________ From: R-help > <r-help-boun...@r-project.org<mailto:r-help-boun...@r-project.org>> > on behalf of akshay kulkarni > <akshay...@hotmail.com<mailto:akshay...@hotmail.com>> > Sent: Saturday, June 17, 2023 10:46 PM To: R help Mailing > list <r-help@r-project.org<mailto:r-help@r-project.org>> > Subject: [R] warnng to an error.... > Dear members, > I have the following code: >> FUN(OHLCDataEP[[63]]) > Error in (class(x) == "xts") || (class(x) == "zoo") : > 'length = 2' in coercion to 'logical(1)' >> traceback() > 2: ygix(x, "c") at <tmp>#9 1: FUN(OHLCDataEP[[63]]) >> class(OHLCDataEP[[63]]) > [1] "xts" "zoo" > The following is in ygix() : > if((class(x) == "xts") || (class(x) == "zoo") > I think this would have been a warning > (https://stackoverflow.com/questions/72848442/r-warning-lengthx-2-1-in-coercion-to-logical1) > but I am on a ubuntu22.04 machine with R 4.3.0. > What should I do? Change it to: if((class(x)[1] == "xts") > || (class(x)[2] == "zoo")) {code}... > or is there any workaround? > THanking you, Yours sincerely, AKSHAY M KULKARNI > [https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-i...@2.png?v=73d79a89bded]<https://stackoverflow.com/questions/72848442/r-warning-lengthx-2-1-in-coercion-to-logical1> > R Warning 'length(x) = 2 > 1' in coercion to > 'logical(1)'<https://stackoverflow.com/questions/72848442/r-warning-lengthx-2-1-in-coercion-to-logical1> > Using R 4.1.3 I observe: var <- 0 > > if(is.data.frame(var) || is.vector(var)) var <- > as.matrix(var) > is.null(var) || (!is.matrix(var) > && var == 0) || (dim(var)==c(1,1) &&... > stackoverflow.com<http://stackoverflow.com> > [[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 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<mailto: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. [[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.