#[derive(Debug, thiserror::Error, PartialEq)]
pub enum EvaluatorError {
#[error("time-series' length {actual} is smaller than the minimum required length {minimum}")]
ShortTimeSeries { actual: usize, minimum: usize },
#[error("feature value is undefined for a flat time series")]
FlatTimeSeries,
#[error("zero division: {0}")]
ZeroDivision(&'static str),
}
#[derive(Debug, thiserror::Error, PartialEq)]
pub enum SortedVecError {
#[error("SortedVec::new accepts only sorted vectors")]
Unsorted,
}