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 <[EMAIL PROTECTED]> 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, [EMAIL PROTECTED]
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
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