Hi Mr. Cleland it worked excellently well, and i believe the same logic or function by() can be used even for running regressions on subsets of huge datasets. correct me if iam wrong
thank you for the help rgds snvk On 8/24/05, Krishna <[EMAIL PROTECTED]> wrote: > Hi Mr. Cleland > > Could you please detail the function. > > Thanks and best regards > > snvk > > On 8/24/05, Chuck Cleland <[EMAIL PROTECTED]> wrote: > > by(mydata, mydata$GROUPING, function(x) cor(x$x, x$y, use="pair")) > > > > ?by > > > > Krishna wrote: > > > Hi all > > > > > > Having searched the available documentation on R, I request for help > > > in sorting out the underlying problem. > > > > > > I have a huge dataset containing 2 variables x and y, which is a daily > > > price series. > > > > > > I would like to observe the quarterly correlations among these two > > > variables. Is there anyway where i can calculate cor.coeff by using a > > > grouping variable in R. > > > > > > thanks in advance for the help > > > > > > rgds > > > > > > snvk > > > > > > ______________________________________________ > > > R-help@stat.math.ethz.ch mailing list > > > https://stat.ethz.ch/mailman/listinfo/r-help > > > PLEASE do read the posting guide! > > > http://www.R-project.org/posting-guide.html > > > > > > > -- > > Chuck Cleland, Ph.D. > > NDRI, Inc. > > 71 West 23rd Street, 8th floor > > New York, NY 10010 > > tel: (212) 845-4495 (Tu, Th) > > tel: (732) 452-1424 (M, W, F) > > fax: (917) 438-0894 > > > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
