I am trying to perform the following calculation for a very large time series data set:
x<-unit(length*data.frame.a*data.frame.b,"cm") data.frame.a and data.frame.b are of the same dimension, and I wish to perform the calculation in one step so that "x" is returned as a matrix/data.frame of equal dimension. I have tried a couple of methods for this, (subsetting data.frame.a and data.frame.b and performing the calculation on a column by column basis for instance, and trying to loop a function over column data), but each time I am returned with a list for x rather than a data frame. Sorry if this is a stupid question, I have looked through some R literature but don't seem able to find the answer. Thank you for any help. Laura ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
