> > > Anyway, I would like to Fourier-transform one column. So I say: > >> fft(test1$vP) > > Error in levels(x)[x] : invalid subscript type 'complex'
> >> test1$vP[1:10] > > [1] 110 108 116 118 114 120 117 111 95 118 > > 166 Levels: - 0 1 10 100 101 102 103 104 105 106 107 108 109 11 110 111 > ... 99 > > > Obviously there is some "-" sign in your data file. You might want to > fix that prior to importing the data. You cannot convert easily to > numeric with artifacts like the string "-" in your data. > > Uwe Ligges Thanks a lot! This works now! Philip Silva -- ______________________________________________ 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.
