Fix Nearest interpolation strategy

jturner314 · jturner314 · commit 444b60958557 · 2018-09-04T00:41:15.000-04:00
diff --git a/src/percentile.rs b/src/percentile.rs
@@ -92,8 +92,7 @@ pub mod interpolate {
 
     impl<T> Interpolate<T> for Nearest {
         fn needs_lower(q: f64, len: usize) -> bool {
-            let lower = <Self as Interpolate<T>>::lower_index(q, len);
-            ((lower as f64) - <Self as Interpolate<T>>::float_percentile_index(q, len)) <= 0.
+            <Self as Interpolate<T>>::float_percentile_index_fraction(q, len) < 0.5
         }
         fn needs_upper(q: f64, len: usize) -> bool {
             !<Self as Interpolate<T>>::needs_lower(q, len)

Original file line number	Diff line number	Diff line change
`@@ -92,8 +92,7 @@ pub mod interpolate {`
`92`	`92`
`93`	`93`	`impl<T> Interpolate<T> for Nearest {`
`94`	`94`	`fn needs_lower(q: f64, len: usize) -> bool {`
`95`		`- let lower = <Self as Interpolate<T>>::lower_index(q, len);`
`96`		`- ((lower as f64) - <Self as Interpolate<T>>::float_percentile_index(q, len)) <= 0.`
	`95`	`+ <Self as Interpolate<T>>::float_percentile_index_fraction(q, len) < 0.5`
`97`	`96`	`}`
`98`	`97`	`fn needs_upper(q: f64, len: usize) -> bool {`
`99`	`98`	`!<Self as Interpolate<T>>::needs_lower(q, len)`