search for: chrysanthi

...classification algorithm and check the accuracy of the prediction according to different training and testing schemes. For example, extracting 70% of the samples for training and the rest for testing, or using 10-fold cross validation scheme. How can I do that? Is there a function? Thanks a lot, Chrysanthi. [[alternative HTML version deleted]]

...selected for each node during the construction of each tree? I mean, that I would like to know the m<<M variables that are selected at each node out of the M input attributes.. Are they selected randomly? Is there a possibility to select the same variable in subsequent nodes? Thanks a lot, Chrysanthi. [[alternative HTML version deleted]]

...e (actual value - mean of the group) / standard deviation. But, mean of which group? Mean of the gene vector? And actual value of that gene on a sample? I would be grateful if you could give me some more details about it or even if there is a book/manual that I could address to.. Thanks a lot, Chrysanthi. * * [[alternative HTML version deleted]]

...randomForest package and I am interested in examining the "Gini importance" measures that are used as a general indicator of feature relevance. Is there a possibility of getting the Gini measure that is being estimated in each tree by the output of the getTree() function? Thanks a lot, Chrysanthi [[alternative HTML version deleted]]

...e: matching each row (Marc Schwartz)   79. Re: OK - I got the data - now what? :-) (Mark Knecht)   80. \dQuote in packages (Rebecca Sela)   81. Re: truncated regression out-of-sample predictions       (Wouterse, Fleur (IFPRI-Senegal))   82. heatmap.2: question regarding the "raw z-score" (Chrysanthi A.)   83.  print() to file? (Steve Jaffe)   84. Re: print() to file? (Greg Snow)   85. Re: Reading from Google Docs (Gabor Grothendieck)   86. Re: matching each row (tathta)   87. bootstrapping error message "Error in t.star[r, ] <-       statistic(data, i[r, ], ...) : number of items to re...