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Prefix

millwright::onnx

Enum Prefix 

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pub enum Prefix {
    Affine {
        shift: Vec<f64>,
        scale: Vec<f64>,
    },
    Impute {
        fill: Vec<f64>,
    },
    OneHot {
        columns: Vec<Vec<i64>>,
    },
}
Expand description

A preprocessing step expressible as ONNX graph nodes, prepended in front of an estimator so a whole pipeline becomes one graph. Each maps a same-width feature tensor to another.

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Affine

y = (x - shift) / scale, elementwise per column (scalers).

Fields

§shift: Vec<f64>
§scale: Vec<f64>
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Impute

Replace missing (NaN) values with a per-column constant (imputers).

Fields

§fill: Vec<f64>
§

OneHot

One-hot encode: columns[c] is the categories input column c expands to (an empty list passes the column through). Changes the feature width.

Fields

§columns: Vec<Vec<i64>>

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