Antje Nöthlich <antno <at> web.de> writes: [...] > Now for the whole dataframe i would like to delete rows that have the same > "Datetime" value as the prior row.
Well, if you do this, then you loose data. is this really, what you want? Throwing away data? I would think it make sense, if all columns are equal, so that unique() could be used - then you only throw away data, which already is registered in your data frame. But when you throw away different values because of the same date-time, then there is the question: WHICH would you throw away? All but the first? Or do you want to select a maximum or minimum? You attempt looks strange to me... Ciao, Oliver ______________________________________________ R-help@r-project.org mailing list 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.
