Hi list, I'm looking for a way to easily extract regression p-values and export them to one file for further evaluation. Here is the problem. I use lm() and step() to get my regression parameters/coefficients. after that I can extract them with summary(lm-results)$coefficients[,4] so far so good but it seems that if a value is not significant it is dropped from the table/matrix so the previous command yields no consistent results with respect to the order of appearance. so I can get p-values for one regression being: a b c d .01 .01 .01 .01 and the next a b d .01 .01 .01 so it's not easy to match them up correctly, because these shifts in order or the lack of NA or empty spaces. I would like an output to text file in this form independent parameters: a b c p-values: .01 .02 .01 .01 NA .01 ... etc Any ideas to get a nice (and easy) output file where the dropped values are filled in with NA and keeping the order and labels ok... ? Best regards, Koen