search for: sonego

Dear R users, I have a big text file formatted like this: x x_string y y_string id1 id1_string id2 id2_string z z_string w w_string stuff stuff stuff stuff stuff stuff stuff stuff stuff // x x_string1 y y_string1 z z_string1 w w_string1 stuff stuff stuff stuff stuff stuff stuff stuff stuff // x x_string2 y y_string2 id1

...and I'd like to reproduce the weighted random forest analysis proposed in the Chen, Liaw & Breiman paper "Using Random Forest to Learn Imbalanced Data"; can I use the R package randomForest to perform such analysis? What is the easiest way to accomplish this task? Thanks, Paolo Sonego

Hello, I have binary labels from a nearest shrunken centroids prediction (package pamr). I need to obtain a ROC curve for this test. What is the easiest way to obtain one? Paolo Sonego

Dear all, I'm a big fan and happy user of the Sweave package for routine reporting. From inside a .Rnw script, I'd like to produce the references in bibtex format for each package loaded in the environment, write them in a .bib file and load them back from the \bibliography{bibliography} statement. Is this feasible? Any help would be greatly appreciated! Thanks in advance, Paolo

Hi list, The function is.integer tests if an object is of type integer: see e.g.: is.integer(12) # FALSE is.real(12) # TRUE mode(12) # "numeric" But how can I test if a number is actually an integer? R seek is difficult to search in this case because it mainly yields entries about the integer()-function family. Thanks for any hint! Christoph Heibl

Hi people, I have a text file like this one posted: snp_id gene chromosome distance_from_gene_center position pop1 pop2 pop3 pop4 pop5 pop6 pop7 rs2129081 RAPT2 3 -129993 "upstream" 0.439009 1.169210 NA 0.233020 0.093042 NA -0.902596 rs1202698 RAPT2 3 -128695 "upstream" NA