Fix doc-tests for variance.
@@ -76,6 +76,9 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
}
/// The sum of all the rows of this matrix.
+ ///
+ /// Use `.row_variance_tr` if you need the result in a column vector instead.
+ ///
/// # Example
///
/// ```
@@ -138,11 +141,12 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
/// # Example
///
/// ```
+ /// # #[macro_use] extern crate approx;
/// # use nalgebra::Matrix2x3;
///
/// let m = Matrix2x3::new(1.0, 2.0, 3.0,
/// 4.0, 5.0, 6.0);
- /// assert_eq!(m.variance(), 3.5);
+ /// assert_relative_eq!(m.variance(), 35.0 / 12.0, epsilon = 1.0e-8);
/// ```
#[inline]
pub fn variance(&self) -> N {
@@ -156,6 +160,8 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
}
/// The variance of all the rows of this matrix.
+ ///
+ /// Use `.row_variance_tr` if you need the result in a column vector instead.
/// # Example
///
/// ```
@@ -163,7 +169,7 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
///
/// let m = Matrix2x3::new(1.0, 2.0, 3.0,
/// 4.0, 5.0, 6.0);
- /// assert_eq!(m.row_variance(), RowVector3::new(4.5, 4.5, 4.5));
+ /// assert_eq!(m.row_variance(), RowVector3::new(2.25, 2.25, 2.25));
/// ```
#[inline]
pub fn row_variance(&self) -> RowVectorN<N, C>
@@ -180,7 +186,7 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
///
/// let m = Matrix2x3::new(1.0, 2.0, 3.0,
/// 4.0, 5.0, 6.0);
- /// assert_eq!(m.row_variance_tr(), Vector3::new(4.5, 4.5, 4.5));
+ /// assert_eq!(m.row_variance_tr(), Vector3::new(2.25, 2.25, 2.25));
/// ```
#[inline]
pub fn row_variance_tr(&self) -> VectorN<N, C>
@@ -246,6 +252,8 @@ impl<N: Real, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
/// The mean of all the rows of this matrix.
///
+ /// Use `.row_mean_tr` if you need the result in a column vector instead.
+ ///
/// # Example
///
/// ```
