Hi see in line
> -----Original Message----- > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of ????????? > ??????? > Sent: Sunday, August 27, 2017 7:53 PM > To: r-help <r-help@r-project.org> > Subject: [R] In Ops.factor(...) not meaningful for factors > > Good evening! > I don't know R, but I have to do this work for my diploma. So I'm sorry for > the > strange message below. Help me anybody decides this issues, please. > > a part of the code is: > > for (i in 1:133) { > r_squared <- vector() as r_squared is inside for cycle it is recreated each time what you probably do not intend. > sample_bank <- mydata[((i-1)*311+1):(i*311),] > > #return for bank > return_bank <- diff(sample_bank[,4])/sample_bank[,4][- > length(sample_bank[,4])] > I've got these errors: > model <- lm(sample_est[,6] ~ sample_est[,7], na.action=na.omit) > Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : 0 > (non-NA) > cases Without some data it hard to say why this error occurs. Normaly lm is called like lm(y~x, some.data) where x and y are names of columns in some.data object (usually data.frame). But I presume that sample_est[,...] are not numeric or there are only NA values in them. > > In addition: Warning message : > In Ops.factor(diff(sample_bank[, 4]), sample_bank[, 4][-length(sample_bank[, : > ‘/’ not meaningful for factors ( how to change type of columns that it works > well?) This is easy. Your columns are of class factor. If you think it should be numeric, you has to find out why it was changed to factor by reading to R. > > colnames(ab_ret) <- as.character(col_nam) > Error in `colnames<-`(`*tmp*`, value = character(0)) : attempt to set colnames > on an object with less than two dimensions If there are not enough This error message is also self explaining ab_ret has only one dimension. > information.. > To load the files available at this URL: > https://drive.google.com/open?id=0BxDK2ohAcqDMN0Vpb1g0U2pCczQ > > I tried to find answers on stackoverflow, but it didn't help me. > I'm sorry, I can't explain well because don't know R and English well. > I'll be glad any helpful information. Final comments. You should learn at least some basic facts about R objects and manipulation with them. There is "R intro" document in your installation. You can inspect your objects by three simple functions str(object) dim(object) head(object) and you can provide data by e.g. dput(yourdata[1:20, ]) And you should configure your mail client to send plain text. In this case your message was readable but it is not guaranteed if you use HTML formating. Cheers Petr BTW this construction [((i-1)*311+1):(i*311) can be replaced by ind<-rep(1:n, each=311) which will create vector of numbers from 1 to n each repeted 311 times and you can use this for selection. > Thank you. > [[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. ________________________________ Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům. Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze svého systému. 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