Remove Display impl, better to use Debug

README.md

@@ -4,4 +4,5 @@ Rust port of [TrueSkillThroughTime.py](https://github.com/glandfried/TrueSkillTh
 
 ## Todo
 
-- [ ] Change `time` to always be a u64 (or usize)?
+- [ ] Add examples (use same TrueSkillThroughTime.py)
+- [ ] Change `time` to always be a u64 (or usize?)

src/gaussian.rs

@@ -1,4 +1,3 @@
-use std::fmt;
 use std::ops;
 
 use crate::{utils, MU, SIGMA};
@@ -38,26 +37,12 @@ impl Gaussian {
         ((self.mu() - m.mu()).abs(), (self.sigma() - m.sigma()).abs())
     }
 
-    pub fn exclude(&self, m: Gaussian) -> Gaussian {
-        Gaussian::new(
+    pub fn exclude(&self, m: Gaussian) -> Self {
+        Self::new(
             self.mu() - m.mu(),
             (self.sigma().powi(2) - m.sigma().powi(2)).sqrt(),
         )
     }
-
-    /*
-    def forget(self,gamma,t):
-        return Gaussian(self.mu, math.sqrt(self.sigma**2 + t*gamma**2))
-
-    def delta(self, M):
-        return abs(self.mu - M.mu) , abs(self.sigma - M.sigma)
-
-    def exclude(self, M):
-        return Gaussian(self.mu - M.mu, math.sqrt(self.sigma**2 - M.sigma**2) )
-
-    def isapprox(self, M, tol=1e-4):
-        return (abs(self.mu - M.mu) < tol) and (abs(self.sigma - M.sigma) < tol)
-    */
 }
 
 impl Default for Gaussian {
@@ -69,12 +54,6 @@ impl Default for Gaussian {
     }
 }
 
-impl fmt::Display for Gaussian {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "N(mu={:.3}, sigma={:.3})", self.mu, self.sigma)
-    }
-}
-
 impl ops::Add<Gaussian> for Gaussian {
     type Output = Gaussian;
 

src/player.rs

@@ -1,5 +1,3 @@
-use std::fmt;
-
 use crate::{Gaussian, BETA, GAMMA, N_INF};
 
 #[derive(Clone, Copy, Debug)]
@@ -35,13 +33,3 @@ impl Default for Player {
         Player::new(Gaussian::default(), BETA, GAMMA, N_INF)
     }
 }
-
-impl fmt::Display for Player {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "Player({}, beta={:.3}, gamma={:.3})",
-            self.prior, self.beta, self.gamma
-        )
-    }
-}