search for: statisitc

Dear all, I am trying to look for a built in function that performs the cochran Q test. that is, cochranq.test(X) where X is a contingency table (maybe a matrix or data.frame). The output will naturally be the test statisitcs, p-value, etc. A quick search on Google gives me the cochran.test in the 'outlier' package, but I had a look at the description of the test and it doesn't look anything close to the cochran Q test. MY questions is: 1. Is that cochran.test the cochran Q test I am looking for? 2. If no...

Dear R-list, I apologize for my many emails but I think I know how to desctribe my problem differently and more clearly. My question is how to compare linear models with intercept and those without intercept using maximizing adjusted R^2 strategy. Now I do it like the following: > library(leaps) > n=20 > x=matrix(rnorm(n*3),ncol=3) > b=c(1,2,0) > intercept=1 >

Hello, I am using the ur.df function from the {arca} package to run the augmented Dickey-Fuller unit root test on several time series. However; I do not understand the econometric interpretation of the the "phi1" and "phi2" test-statisitc which are output if you choose a "trend" or "drift" model. I looked at the source code for the function but I do not quite understand the code (which I have included below). Any help would be much appreciate. Thanks, Max if (type == "drift") { result &lt...

...n the area of Information retrieval. We extracted association rules and attribite-value pairs from the webpages using unsupervised approach. I have also worked on another project with yahoo, which involved emotion detection of youtube videos, based on the comments of the users. We used various ML, Statisitcs andf IR techniques to achieve our goal. I last year succesfully completed GSOC 2011, with OSGEO and have good experience in Open Source Development. Kindly let me know how shall I proceed with my application. Thanks Sudeep -------------- next part -------------- An HTML attachment was scrubbed....

I''m just getting started with GD2 and have successfully made a few dynamic PNGs. I need to make some fairly detailed line graphs on the fly and I know that GD2 is capable of what I want but I strongly suspect I''m reinventing the wheel badly. Are there gems or other projects that help creating complex charts? I''ve used GDChart in the distant past but I