Have a look at the R-FAQ issue 7.10. It's a standard problem For more information about your variable try
str(variable). --- Alexandre Santos <[EMAIL PROTECTED]> wrote: > Dear R list, > > I would like to perform an ANOVA in a set of > measurements, but I have > problems formatting the data. > > The data is a two dimensional array containing two > columns: > - "Stim" : the type of stimulation (string) > - "Ratio" : a ratio of two numeric values > > Now, because some values are missing in the data > (defaulting to zero), > part of this array will be populated with NA ratios. > Maybe this is > important later. > > In order to make the ANOVA analysis, I need to turn > my vector into a data.frame. > > I tried vector.table=as.data.frame(vector) > > But I realized that > is.numeric(Ratio) gives FALSE > is.factor(Ratio) gives TRUE > > After reading the documentation, I tried > > vector.table=as.data.frame(vector, stringsAsFactors > = FALSE) > > This time > > is.numeric(Ratio) gives FALSE > is.factor(Ratio) gives FALSE > > So I don't even know what is Ratio, but it's not yet > numeric (is this > due to the NA values?). > > How can I get R to understand that Ratio is numeric? > Checking the > documentation it seems you can do it with I(x), but > the details are > not explained. I also tried as.numeric(Ratio), and > everything was > turned into zeros. > > Any suggestions? > > Cheers, > > Alexandre Santos > > Neuro-MPI, Martinsread, Germany > > ______________________________________________ > 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. > ______________________________________________ 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.
