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Hi, is there an excellent source of documentation for installation, configuration of R packages (Rmpi,snow,rsprng etc.) for parallel computing on linus system? Thanks

Hi, Is there a R test available that tests whether 2 hazard ratios obtained from Cox regressions on the same patient sample by 2 different classifiers are significantly different? Thanks Steve

Hi, I am running some Cox modeling on large number of variables (thousands) using apply. For some reasons, some of the variables have problems in Cox regression, so the the run was stopped automatically. Is there a way to keep...

Hi, I am using Partek for LDA analysis. For a binary response variable, it generates 2 discriminant functions, one for each of the 2 levels of the response variable. And I can simply calculate 2 discriminant scores (say d1 and...

Hi, I have difficulty in installing package "snow" from CRAN. Somehow, this package is not shown up in the available package list when I tried to use the GUI interface. So I have to go to CRAN to download the...

Hi, I am performing Cox proportional hazards regression on a microarray dataset with 15000 genes. The p values generated from the Cox regression (based on normal distribution of large sample theory) showed only 2 genes have a p value less...

If the treatment contrast is used, the p value for x1 is testing whether the slope at the reference level of x2 is equal to 0 (think about the model y~x1*x2 as fitting 2 straight lines, one for...