- some bugfixes

src/metric.rs

@@ -11,6 +11,7 @@ use num::cast::AsPrimitive;
 use rand::RngExt;
 use rayon::iter::IntoParallelIterator;
 use rayon::iter::ParallelIterator;
+use serde::{Deserialize, Serialize};
 use std::cell::RefCell;
 use std::ops::Deref;
 
@@ -71,6 +72,10 @@ impl FixedMu {
             .filter_map(|(i, j)| if i.is_none() { Some(*j) } else { None })
             .collect()
     }
+
+    pub fn len_variable(&self) -> usize {
+        self.len_variable
+    }
 }
 
 /// first_bin, last_bin: center of bin
@@ -178,7 +183,7 @@ impl Sampling {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub enum SamplingArg {
     Fixed(usize),
     FixedAt(Vec<Vec<f64>>),
@@ -452,7 +457,7 @@ where
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub enum Sigma {
     None,
     Absolute(Vec<f64>),