• Someone Will Win and It Probably Won’t Be You
  • course-nan0-1 Of Course NaN^0 = 1 (7/25/2016) - David Smith and I are now talking to each other in blog posts and it is only a little weird. Also, I’ve been traveling and am a bit behind. In a comment on this post, he notes this: I suspect the reason why R Core adopted the 0^0=1 definition is because of the binomial justification, ... Read more...
  • sextant-triangles So I Am Not Teaching Calculus After All (7/20/2016) - Well, no sooner had I posted my note about teaching calculus again this fall when UMUC changed my schedule. This is not unusual for me (though I may be unusual in this regard at UMUC, it’s a bit unclear). I occasionally end up getting put in other classes than planned at the last minute. Part ... Read more...
  • divid-by-zero NaN versus NA in R (7/18/2016) - R has two different ways of representing missing data and understanding each is important for the user. NaN means “not a number” and it means there is a result, but it cannot be represented in the computer. The second, NA, explains that the data is just missing for unknown reasons. These appear at different times ... Read more...

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Socioeconomic Effects of the National Flood Insurance Program