sjaffe <sjaffe <at> riskspan.com> writes: > > I have data with many factors, each taking many values. However, only > relatively few combinations appear in the data, ie have nonzero counts, in > other words the resulting table is sparse. Say we have 10 factors each with > 10 levels. The result of table() would exceed the memory space (on a 32bit > machine). Is there any way to produce a table with empty cells omitted? > (without first producing the whole table and then removing rows.)
It would be easier if you had a reproducible base example, but I suggest to create ONE new factor of the pasted levels using unique(), and creating a table of these. Dieter ______________________________________________ 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.
