Function project_box 

pub fn project_box(
    x: &Vector<f32>,
    lower: &Vector<f32>,
    upper: &Vector<f32>,
) -> Vector<f32>

Projects onto box constraints: lower ≤ x ≤ upper.

Arguments

• x - Input vector
• lower - Lower bounds
• upper - Upper bounds

Returns

Vector with components clipped to [lower, upper]

Example

use aprender::optim::prox::project_box;
use aprender::primitives::Vector;

let x = Vector::from_slice(&[-1.0, 0.5, 2.0]);
let lower = Vector::from_slice(&[0.0, 0.0, 0.0]);
let upper = Vector::from_slice(&[1.0, 1.0, 1.0]);

let result = project_box(&x, &lower, &upper);

assert_eq!(result[0], 0.0);  // Clipped to lower
assert_eq!(result[1], 0.5);  // Within bounds
assert_eq!(result[2], 1.0);  // Clipped to upper