copy code at your own peril

November 13, 2016
By

(This article was first published on R – Xi'an's Og, and kindly contributed to R-bloggers)

I have come several times upon cases of scientists [I mean, real, recognised, publishing, senior scientists!] from other fields blindly copying MCMC code from a paper or website, and expecting the program to operate on their own problem… One illustration is from last week, when I read a X Validated question [from 2013] about an attempt of that kind, on a rather standard Normal posterior, but using an R code where the posterior function was not even defined. (I foolishly replied, despite having no expectation of a reply from the person asking the question.)

Filed under: Books, Kids, R, Statistics, University life Tagged: Bayesian inference, cross validated, exported code, normal model, R, xkcd

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