machine-learning-projects-for-dot-net-developers issues

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Bug in definition of stdDevs

It seems there is a bug in stdDevs in this file https://github.com/mathias-brandewinder/machine-learning-projects-for-dot-net-developers/blob/master/chapter-5/Unsupervised/Unsupervised/PCA.fs actual let stdDevs_error = Array.init dim (fun i -> let avg = averages.[i] observations |> Seq.averageBy (fun x...

Philippe-Laval

Chapter 2: sort by descending in `top` function

Seems to me `top` function should have `Seq.sortByDescending` instead of `Seq.sortBy` [here](https://github.com/mathias-brandewinder/machine-learning-projects-for-dot-net-developers/blob/master/chapter-2/SpamOrHam/SpamOrHam/NaiveBayes.fsx#L119) Actually, better is `Seq.sortBy >> Seq.rev` as `sortByDescending` had much worse perf when tested

theimowski

Left and right are used in place of each other

If I am headed North and turn Left, I should be headed West: https://github.com/mathias-brandewinder/machine-learning-projects-for-dot-net-developers/blob/master/chapter-7/Game/Game/Game.fs#L50-L59

mathias-brandewinder