[R] test to compare significant correlation increase

Mike Lawrence Mike.Lawrence at DAL.CA
Wed May 30 18:32:17 CEST 2007

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
> 1-(517) 629-5499
> http://www.cstars.ucdavis.edu/~driano/index.html
> http://www.cstars.ucdavis.edu
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Mike Lawrence
Graduate Student, Department of Psychology, Dalhousie University

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