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docs/framework/operators/machine-learning/xgboost-regressor/README.md
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# Tree Regressor | ||
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`XGBoostRegressorTrait` provides a trait definition for xgboost regression. This trait offers functionalities to predict target values based on input features. | ||
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```rust | ||
use orion::operators::ml::XGBoostRegressorTrait; | ||
``` | ||
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### Data types | ||
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Orion supports currently only fixed point data types for `XGBoostRegressorTrait`. | ||
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| Data type | dtype | | ||
| -------------------- | ------------------------------------------------------------- | | ||
| Fixed point (signed) | `TreeRegressorTrait<FP8x23 \| FP16x16 \| FP64x64 \| FP32x32>` | | ||
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*** | ||
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| function | description | | ||
| --- | --- | | ||
| [`xgboost.predict`](xgboost.predict.md) | Predicts the target value for a set of features using the provided ensemble of decision trees. | | ||
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docs/framework/operators/machine-learning/xgboost-regressor/xgboost.predict.md
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# XGBoostRegressorTrait::predict | ||
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```rust | ||
fn predict(ref self: Span<TreeNode<T>>, ref features: Span<T>, ref weights: Span<T>) -> T; | ||
``` | ||
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Predicts the target value for a set of features using the provided ensemble of decision trees | ||
and combining their results using given weights. | ||
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## Args | ||
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* `self`: A reference to a span representing a ensemble of decision trees. | ||
* `features`: A reference to a span representing the features for which the prediction is to be made. | ||
* `weights`: A reference to a span representing the weights applied to the predictions from each tree. | ||
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## Returns | ||
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The predicted target value. | ||
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## Type Constraints | ||
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Constrain input and output types to fixed point. | ||
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## Examples | ||
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```rust | ||
use orion::operators::ml::{FP16x16XGBoostRegressor, TreeRegressorTrait, TreeRegressor}; | ||
use orion::numbers::{FP16x16, FixedTrait}; | ||
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fn xgboost_regressor_example(trees: Span<TreeRegressor<FP16x16>>) { | ||
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let mut features = array![ | ||
FixedTrait::new_unscaled(1, false), | ||
FixedTrait::new_unscaled(2, false), | ||
].span(); | ||
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let mut weights = array![ | ||
FixedTrait::new_unscaled(0.5, false), | ||
FixedTrait::new_unscaled(0.5, false) | ||
].span(); | ||
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FP16x16XGBoostRegressor::predict(ref trees, ref features, ref weights); | ||
} | ||
``` |