At 02:13 PM 9/22/2003 -0500, Douglas Bates wrote:
Rado Bonk <[EMAIL PROTECTED]> writes:
> How can I found the number of a distinct values in a data frame > (occurrence of distinct values)? The dataframe consists of several > thousands integer numbers.
It is not clear if you are asking about the number of unique values in a column in a data frame or the number of unique rows in a data frame. If there is more than one column these answers could be different.
The first is question is the easier one. Just use
length(unique(mydataframe$columnOfInterest))
Since the data frame consists entirely of numeric values, finding the number of unique values in the data frame as a whole isn't much harder:
length(unique(as.vector(as.matrix(mydataframe))))
Regards, John
____________________________ John Fox Department of Sociology McMaster University email: [EMAIL PROTECTED] web: http://www.socsci.mcmaster.ca/jfox
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
