search for: rkinzer

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2012 Feb 06
3
Duplicate rows when I combine two data.frames with merge!
Hello all, First I have done extensive searches on this forum and others and nothing seems to work. So I decided to post thinking someone could point me to the write post or give me some help. I have drawn a 100 samples from a fictitious population (N=1000), and then randomly selected 25% of the 100 samples. I would like to now merge the data.frame from the 100 samples with the data.frame for
2010 Feb 26
2
R Experts
...markd recapd 8/28/1991 12/24/1994 Timeoutd<-recapd-markd Timeoutd = 1945 But the number of days between should be around 1214. Why is this happening and how do you fix it. Thank you for all the help. RKinzer [[alternative HTML version deleted]]
2011 Apr 14
2
Conveting SAS Proc mixed to R code
Hello all, I am trying to teach myself R and replicate some previous SAS analysis. Could someone please help me translate the following SAS code into R. Proc mixed method=ml Class Group Treatment Stream Time Year; Model Logrpk=Treatment Time Treatment*Time; Random Group Stream (Group Treatment) Year(Time); Thank you to anyone that may help! -- View this message in context:
2011 Apr 14
0
Help converting SAS Proc mixed to R code
To anyone that may be able to help, First I applogize if this message ends up in your inbox twice. The first one seemed to get stuck in a pending status so I deleted and started over. I am relatively new to R, however I know the basics through some classes I have taken. Unfortunately the classes left off the more complicated analysis that I need to learn and use. I am attempting to replicate