Standard Deviation, Root Mean Square and the Central Moments (Statistics in...
[digg-reddit-me]These are standard statistical tools for measuring differences, drift and error within sets, as well as Kth moments about the mean. Central moments are also the building blocks of...
View ArticleRanks Of, Ordered Ranks Of and Tied Ranks Of (Statistics in Erlang part 4)
[digg-reddit-me]The upcoming Statistics in Erlang post, on correlations, requires some groundwork tools. At this time, I don’t actually know the proper statistical names for these functions, and in...
View ArticleStatistical Correlations (Statistics in Erlang part 5)
[digg-reddit-me]Since most of my readers are programmers, I’m going to explain this in programmer-speak. Also, it’s damned hard to find a non-math explanation of this stuff. The general idea with...
View ArticleThe Pearson Correlation Coefficient (Statistics in Erlang part 6)
[digg-reddit-me]I went over much of the concept of correlations in Part 5; if you don’t know what statistical correlations are, you should read part 5 first. The Pearson Correlation Coefficient is one...
View ArticleSpearman’s Rank Correlation Coefficient (Statistics in Erlang part 7)
[digg-reddit-me]Spearman’s Rank Correlation Coefficient – usually just called The Spearman Correlation, sometimes Spearman’s Rank or Spearman’s Rho – is a method of determining the similarity between...
View ArticleMoments, Skewness and Kurtosis (Statistics in Erlang part 8)
[digg-reddit-me]So, it was pointed out to me that I had the central moments, but not the moments – ie, the ones not normalized against the input’s average. Also, it was pointed out that most people...
View ArticleYay for Varun! Open Source Inbound
My boss’ boss, Varun, is letting me open source some of the work I’m doing at Kayako. I’m not supposed to talk about the interesting three until they’re ready for release, but I can tell you that a...
View ArticlePrototype: EEP18 Considered Harmful: The problems with Erlang to JSON term...
THIS IS ONLY HALF WRITTEN. I have been sitting on this post, waiting for the mood to finish it, for months; because EEP18 is now being treated as a likely implement, I am immediately publishing the...
View ArticleMaking significant strides towards documenting ScUtil
[digg-reddit-me]My erlang library ScUtil has been public at the ScUtil page for some time now. Recently, I’ve been working on documenting it. It’s about half documented in its current state. Here’s...
View ArticleA Better Erlang TCP listening pattern: addressing the fast packet loss problem
[digg-reddit-me]I’ve had mixed reactions to this when I’ve discussed it with people on IRC. This may be well known to oldbear Erlang programmers. I suppose it’s also possible that I’m wrong, though...
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