jaxopt.projection.projection_l1_ball
- jaxopt.projection.projection_l1_ball(x, max_value=1.0)[source]
Projection onto the l1 ball:
\[\underset{y}{\text{argmin}} ~ ||x - y||_2^2 \quad \textrm{subject to} \quad ||y||_1 \le \text{max_value}\]- Parameters
x (
Array) – array to project.max_value (
float) – radius of the ball.
- Return type
Array- Returns
output array, with the same structure as
x.