Ram: You do not say how many cases (rows in your dataset) you have, but I suspect it may be small (a few hundred, say).
In any case, what you describe is probably just a complicated way to generate random numbers -- it is **highly** unlikely that any meaningful, replicable scientific results would result from your proposed approach. Not surprising -- this appears to be a very difficult data analysis issue. It is obvious that you have only a minimal statistical background, so I would strongly recommend that you find a competent local statistician to help you with your work. Remote help from this list is wholly inadequate. Bert Gunter Genentech Nonclinical Statistics -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of ram basnet Sent: Wednesday, January 27, 2010 2:52 AM To: R help Subject: [R] selecting significant predictors from ANOVA result Dear all, I did ANOVA for many response variables (Var1, Var2, ....Var75000), and i got the result of p-value like below. Now, I want to select those predictors, which have pvalue less than or equal to 0.05 for each response variable. For example, X1, X2, X3, X4, X5 and X6 in case of Var1, and similarly, X1, X2.......X5 in case of Var2, only X1 in case of Var3 and none of the predictors in case of Var4. predictors Var1 Var2 Var3 Var4 X1 0.00005 0.001 0.05 0.36 X2 0.0001 0.001 0.09 0.37 X3 0.0002 0.005 0.13 0.38 X4 0.0003 0.01 0.17 0.39 X5 0.01 0.05 0.21 0.4 X6 0.05 0.0455 0.25 0.41 X7 0.038063 0.0562 0.29 0.42 X8 0.04605 0.0669 0.33 0.43 X9 0.054038 0.0776 0.37 0.44 X10 0.062025 0.0883 0.41 0.45 I have very large data sets (# of response variables = ~75,000). So, i need some kind of automated procedure. But i have no ideas. If i got help from some body, it will be great for me. Thanks in advance. Sincerely, Ram Kumar Basnet, Ph. D student Wageningen University, The Netherlands. [[alternative HTML version deleted]] ______________________________________________ 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.