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2011 Aug 25
2
how to read a group of files into one dataset?
for example : I have files with the name "ma01.dat","ma02.dat","ma03.dat","ma04.dat",I want to read the data in these files into one data.frame flnm<-paste("obs",101:114,"_err.dat",sep="") newdata<-read.table(flnm,skip=2) data<-(flnm,skip=2) but the data only contains data from the flnm[1] I also tried as below : for (i in 1:9) { d...
2008 Aug 05
0
P values in non linear regression and singular gradients using nls
...> ------------------------------ Message: 4 Date: Sun, 03 Aug 2008 09:53:59 -0400 From: Thomas P C Chu <tchu11 at netscape.net> Subject: Re: [R] drop1() seems to give unexpected results compare to anova() To: r-help at r-project.org Message-ID: <8CAC38783A1F557-DCC-1DB6 at WEBMAIL-MA04.sysops.aol.com> Content-Type: text/plain; charset="us-ascii"; format=flowed Thanks to Mr Dalgaard for his advice and everyone else who has contributed. Inclusion of an error term at the end of sim.set$y = ... line did cure my problems with drop1() and step(). I suppose it is my own...