Just a guess (please correct if I'm way off on this), but maybe you could look at the difference in r betwen 1 & 2 and see if the confidence interval (http://davidmlane.com/hyperstat/B8544.html) for this value given your sample size includes 0.
On 30-May-07, at 11:24 AM, David Riano wrote: > Hi! > I am calculating correlation between two variables: > 1. X versus Y > 2. X versus Y(with a 3 steps lag) > > I would like to test if the correlation > increase/decrease from 1 to 2 is significant or not. > > Is there any function in R to do this? any hints? > > Thanks for help :) > > David Riaño > Center for Spatial Technologies and Remote Sensing (CSTARS) > University of California > 250-N, The Barn > One Shields Avenue > Davis, CA 95616-8527 > USA > 1-(517) 629-5499 > http://www.cstars.ucdavis.edu/~driano/index.html > http://www.cstars.ucdavis.edu > > ______________________________________________ > [email protected] 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. -- Mike Lawrence Graduate Student, Department of Psychology, Dalhousie University Website: http://myweb.dal.ca/mc973993 Public calendar: http://icalx.com/public/informavore/Public "The road to wisdom? Well, it's plain and simple to express: Err and err and err again, but less and less and less." - Piet Hein ______________________________________________ [email protected] 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.
