Mercurial > repos > non-riemannian-opt / file comparison
comparison: src/scaled.rs
src/scaled.rs
- changeset 55
- 15f01efc034b
- parent 46
- 90cc221eb52b
- child 56
- 34f8ec636368
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| 54:cfd8d2304e9e | 55:15f01efc034b |
|---|---|
| 1 /*! | 1 /*! |
| 2 Implementation of scaling of functions on a manifold by a scalar. | 2 Implementation of scaling of functions on a manifold by a scalar. |
| 3 */ | 3 */ |
| 4 | 4 |
| 5 use alg_tools::mapping::Apply; | 5 use alg_tools::mapping::{Mapping, Instance}; |
| 6 use crate::manifold::ManifoldPoint; | 6 use crate::manifold::ManifoldPoint; |
| 7 use crate::fb::{Grad, Desc, Prox}; | 7 use crate::fb::{Grad, Desc, Prox}; |
| 8 | 8 |
| 9 /// Structure for a function of type `G`, scaled by a scalar. | 9 /// Structure for a function of type `G`, scaled by a scalar. |
| 10 pub struct Scaled<G> { | 10 pub struct Scaled<G> { |
| 20 pub fn new(α : f64, g : G) -> Self { | 20 pub fn new(α : f64, g : G) -> Self { |
| 21 Scaled{ α, g } | 21 Scaled{ α, g } |
| 22 } | 22 } |
| 23 } | 23 } |
| 24 | 24 |
| 25 impl<M, G : Apply<M, Output=f64>> Apply<M> for Scaled< G> { | 25 impl<M, G : Mapping<M, Codomain=f64>> Mapping<M> for Scaled< G> { |
| 26 type Output = f64; | 26 type Codomain = f64; |
| 27 | 27 |
| 28 fn apply(&self, x : M) -> Self::Output { | 28 fn apply<I : Instance<M>>(&self, x : I) -> Self::Codomain { |
| 29 self.g.apply(x) * self.α | 29 self.g.apply(x) * self.α |
| 30 } | 30 } |
| 31 } | 31 } |
| 32 | 32 |
| 33 impl<M : ManifoldPoint, G : Desc<M>> Desc<M> for Scaled<G> { | 33 impl<M : ManifoldPoint, G : Desc<M>> Desc<M> for Scaled<G> { |
