Hi
I have dataframe which contain 5 columns and 1000 records. I want standard
each cell.
I want range each column between 0 and 1 . I think i must use loop?
could you help me?
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Try having a look at the scale and sweep functions. David On 13/07/07, Amir_17 <amirhendi at yahoo.com> wrote:> Hi > I have dataframe which contain 5 columns and 1000 records. I want standard each cell. > I want range each column between 0 and 1 . I think i must use loop? > could you help me? > > > --------------------------------- > Moody friends. Drama queens. Your life? Nope! - their life, your story. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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 > and provide commented, minimal, self-contained, reproducible code. >-- ================================David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP
On Fri, 13 Jul 2007, David Barron wrote:> Try having a look at the scale and sweep functions.sweep applies to arrays, not data frames, and scale converts to a matrix. For a data frame df2 <- df1 df2[] <- lapply(df1, function(x) {r <- range(x, na.rm=TRUE); (x-r[1])/diff(r)}) seems simple enough.> On 13/07/07, Amir_17 <amirhendi at yahoo.com> wrote: >> Hi >> I have dataframe which contain 5 columns and 1000 records. I want standard each cell. >> I want range each column between 0 and 1 . I think i must use loop? >> could you help me?-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595