Undergrad major in physics, (switched to biophysics), medical school, family medicine, Masters in Public Health, and last 15 years in life insurance. Learned R on my own and have used it daily for last 6+years.
28 How to interpret coefficients in a Poisson regression? may 21 '11
9 Splitting a numeric column for a dataframe feb 2 '11
8 Time dependent coefficients in R - how to do it? dec 11 '11
7 Mean of means by a factor versus global mean sep 5 '11
6 Filling NAs in a dataset with column medians in R may 16 '12
6 How to calculate goodness of fit in glm (R) dec 21 '12