68 lines
1.7 KiB
Rust
68 lines
1.7 KiB
Rust
//! Datasets
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//!
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//! In this module you will find small datasets that are used in SmartCore for demonstration purpose mostly.
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/// The Boston Housing Dataset
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pub mod boston;
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/// Iris flower data set
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pub mod iris;
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/// Dataset
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pub struct Dataset<X, Y> {
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/// data in one-dimensional array.
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pub data: Vec<X>,
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/// target values or class labels.
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pub target: Vec<Y>,
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/// number of samples (number of rows in matrix form).
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pub num_samples: usize,
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/// number of features (number of columns in matrix form).
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pub num_features: usize,
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/// names of dependent variables.
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pub feature_names: Vec<String>,
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/// names of target variables.
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pub target_names: Vec<String>,
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/// dataset description
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pub description: String,
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}
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impl<X, Y> Dataset<X, Y> {
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/// Reshape data into a two-dimensional matrix
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pub fn as_matrix(&self) -> Vec<Vec<&X>> {
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let mut result: Vec<Vec<&X>> = Vec::with_capacity(self.num_samples);
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for r in 0..self.num_samples {
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let mut row = Vec::with_capacity(self.num_features);
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for c in 0..self.num_features {
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row.push(&self.data[r * self.num_features + c]);
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}
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result.push(row);
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}
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result
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn as_matrix() {
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let dataset = Dataset {
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data: vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
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target: vec![1, 2, 3],
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num_samples: 2,
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num_features: 5,
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feature_names: vec![],
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target_names: vec![],
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description: "".to_string(),
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};
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let m = dataset.as_matrix();
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assert_eq!(m.len(), 2);
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assert_eq!(m[0].len(), 5);
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assert_eq!(*m[1][3], 9);
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}
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}
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