Merry Christmas for all readers. Please enjoy my tree. codepart <- list(x0=0,y0=0,x1=0,y1=1, branch1=NULL,branch2=NULL,extend=NULL, lwd=1,depth=0,col='springgreen')par(mfrow=c(1,1),mar=c(5, 4, 4, 2) + 0.1)segplot <-...

Fukushima is still a topic which gets headlines, and somewhere in a comment was a link to actual and historical radiation data: Fukushima prefecture radioactivity measurement map. It takes a bit of time to load but then you have a map of the Fukushima region with current radiation levels at measurement stations. Somewhere on that website there is...

Last week I looked at two-way cross-over studies and followed the example of Schütz (http://bebac.at/) in the analysis. Since the EU has its on opinions (Questions & Answers: Positions on specific questions addressed to the pharmacokinetics working party) and two example data sets, I was wondering how the various computations compared.Data There...

I ran into this presentation on Statistical aspects of two-way cross-over studies by Ing. Helmut Schütz (http://bebac.at). He presented some code and referred to the bear package. The bear package is menu driven, which is not my thing. I had to try and do that in R via other packages. The aim is to estimate if the...

Based on some comments I am looking at using symmetry to obtain Williams style designs. Symmetry allows reduction of the number of combinations examined hence faster calculation times. Two avenues are examined. Both work for a low number of treatments....

Those are Williams designs you might say, but it has become clear to me that Williams designs are just a subset of all carry-over balanced designs. Not through hard work of mine, comments by Apn on my previous post Creating Williams designs with e...