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Machine Learning in Elixir: model accuracy

justincjohnson

justincjohnson

Machine Learning in Elixir: model accuracy

@seanmor5

In chapter 1, the accuracy of the model is 0.9666666. On my laptop I only get an accuracy of 0.5333333. Is that a problem? If not, maybe it’s worth calling out in the text so people like me don’t wonder if they did something wrong.

Of course maybe I did something wrong. :slight_smile:

3 comments
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Marked As Solved

seanmor5

seanmor5

Author of Genetic Algorithms in Elixir

There is an issue with how I transcribed one-hot encoding in the book. The correct version:

train_df
|> DF.pull(label_column)
|> Explorer.Series.to_list()
|> Enum.map(fn
"Iris-setosa" -> 0
"Iris-versicolor" -> 1
"Iris-virginica" -> 2
end)
|> Nx.tensor(type: :u8)
|> Nx.new_axis(-1)
|> Nx.equal(Nx.iota({1, 3}, axis: -1))
1
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