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In the Stanford online course in probabilistic graphical models, they use their own linear congruential random number generator. The results from that generator differ between R2012a and earlier versions of MATLAB, and I boiled it down to a difference in the calculation of mod() for a very large number:
Since the first argument is 17 digits, and therefore not accurately stored as an integer, it is no surprise to me that mod() might struggle; but I am wondering if anyone can give me some more specific insight as to why the behavior may have changed from version R2011b to R2012a.
@Walter Roberson is correct, in R2012a MATLAB automatically casts the number into a uint64. For this piece of code
In R2011b I get this:
In R2012a I get this: