Hi, Thanks, the cor() works.
Regarding the simple linear regression equation (mainly, the slope parameter) and r2. I think I was not writing it well. I need to do it just for the columns. If I have a, b, c, d columns I wish to compute the relation of there data, e.g., between a-b, a-c, a-d, b-a, b-c, b-d, etc. I hope it is clear now and an help will be great. Thanks. -- View this message in context: http://r.789695.n4.nabble.com/Linear-regression-equation-and-coefficient-matrix-tp2329804p2329948.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org 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.