2005/6/9, Sarah Goslee <[EMAIL PROTECTED]>: > Under R, for reasons I've never quite understood, > "\\." evaluates to .
Thanks to the answers of B. Ripley and Gabor I think, I understand now: 1) the patter-string "\\.csv$" gives the regular expression "\.csv$" 2) now the backslash lets the dot to be interpreted literally (instad of a metacharacter). As said by Gabor, an alternative is, to put the dot between brackets >If you mean you want to change the "\" to either "\\" or "/" I'm >really not sure. Yes that's what I intended. Because in windwos I copy the path from the address bar of the explorer and paste it in the R console window. Now I *have* something like myfile <- "D:\UebungenNDK\DataMining\DataMiningSeries.r" that needs to be adjusted manually ;-( I interpret the answers >> myfile <- "D:\UebungenNDK\DataMining\DataMiningSeries.r" >I am sure that's not what you intended. It has to be written as > [snip] [1] "D:/UebungenNDK/DataMining/DataMiningSeries.r" and >> myfile <- "D:\UebungenNDK\DataMining\DataMiningSeries.r" >Variable myfile, as you have written it above, has no backslashes in it >so there is no way way to know where they are supposed to be. that it's not possible at all to have a character string with backslashes in it (because they *will* act as escape characters). - Maybe I could get along by writing an *external* function that would give me back a proper formatted path, eg. fold <- as.path( "D:\UebungenNDK\DataMining\DataMiningSeries.r" ) [1] "D:/UebungenNDK/DataMining/DataMiningSeries.r" - But then the behaviour would be different from all the other strings in R which doesn't seem to be a good idea either > I've always just processed the strings in vim or similar, rather than fight with R. I do it in DOS-Batch files. Quite ugly but it works... Regards, Hans-Peter ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html