On 5/8/08, Ola Caster <[EMAIL PROTECTED]> wrote: > Dear help list, > > Is it possible to draw lattice histograms (i.e. use the histogram() function > and not the hist() function) with objects of class "Date"?
Sort of. The default calculation of 'breaks' doesn't work, so histogram(~date, data=my.data) will currently fail (I will fix this in the next update). However, histogram(~date, data=my.data, breaks = 10) histogram(~date, data=my.data, breaks = "fd") etc., should work. The help page for histogram is somewhat ambiguous; it says: breaks: [...] Other valid values of 'breaks' are those of the 'breaks' argument in 'hist'. This allows specification of 'breaks' as an integer giving the number of bins (similar to 'nint'), as a character string denoting a method, and as a function. What is meant here is that valid values of breaks in 'hist.default' will work, not those for any other methods. In particular, breaks = "months" will not work. -Deepayan > I've tried solutions like > > histogram(~date, data=my.data, breaks="months") > > but it doesn't seem to work. > > Any suggestions are welcome. > > Many thanks > Ola Caster ______________________________________________ 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.