rds 0.0.3

Rust Data Science
Documentation 
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use array::{NDArray, NDData, NDDataMut, NDSliceable, NDSliceableMut};

#[test]
fn indexing() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                assert!(array[&[i,j,k]] == (i * 3 + j * 5 + k * 7) as f64);
            }
        }
    }
}

#[test]
#[should_panic]
fn indexing_wrongdim() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    array[&[1,2]] = 1.0;
}

#[test]
#[should_panic]
fn indexing_outofbound() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    array[&[1,4,1]] = 1.0;
}

#[test]
fn slicing() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    for i in 0..3 {
        let slice2d = array.slice(&[i]);
        for j in 0..3 {
            let slice1d = slice2d.slice(&[j]);
            for k in 0..3 {
                assert!(slice1d[&[k]] == (i * 3 + j * 5 + k * 7) as f64);
            }
        }
    }
}

#[test]
fn slicing_mut() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            let mut slice1d = array.slice_mut(&[i, j]);
            for k in 0..3 {
                slice1d[&[k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                assert!(array[&[i,j,k]] == (i * 3 + j * 5 + k * 7) as f64);
            }
        }
    }
}
#[test]
fn copy() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * j * k) as f64;
            }
        }
    }
    let array2 = NDArray::copy(&array.slice(&[2]));
    for i in 0..3 {
        for j in 0..3 {
            assert!(array2[&[i,j]] == (i * j * 2) as f64);
        }
    }
}

#[test]
fn from_slice() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * j * k) as f64;
            }
        }
    }
    let array2 = NDArray::from_slice(&[3, 3, 3], array.get_data());
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                assert!(array2[&[i,j,k]] == (i * j * k) as f64);
            }
        }
    }
}

#[test]
fn reshape() {
    let mut array = NDArray::<f64>::new(&[3], 0.0);
    for i in 0..3 {
        array[&[i]] = i as f64;
    }
    array.reshape(&[1,3]);
    for i in 0..3 {
        assert!(array[&[0,i]] == i as f64);
    }
}

#[test]
#[should_panic]
fn reshape_invalid() {
    let mut array = NDArray::<f64>::new(&[3], 0.0);
    for i in 0..3 {
        array[&[i]] = i as f64;
    }
    array.reshape(&[3,3]);
    for i in 0..3 {
        assert!(array[&[i,i]] == i as f64);
    }
}

#[test]
fn generic_transpose_2d() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    array.slice_mut(&[1]).transpose();
    for i in 0..3 {
        for j in 0..3 {
            assert!(array[&[1,j,i]] == (3 + i * 5 + j * 7) as f64);
        }
    }
}

#[test]
fn generic_transpose_3d() {
    let mut array = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                array[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    array.transpose();
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                assert!(array[&[k,j,i]] == (i * 3 + j * 5 + k * 7) as f64);
            }
        }
    }
}

#[test]
#[should_panic]
fn generic_transpose_wrong_shape() {
    let mut array = NDArray::<f64>::new(&[3, 3, 4], 0.0);
    array.slice_mut(&[]).transpose();
}

#[test]
fn transpose_2d() {
    let mut array = NDArray::<f64>::new(&[3, 4], 0.0);
    for i in 0..3 {
        for j in 0..4 {
            array[&[i, j]] = (i * 3 + j * 5) as f64;
        }
    }
    array.transpose();
    for i in 0..3 {
        for j in 0..4 {
            assert!(array[&[j,i]] == (i * 3 + j * 5) as f64);
        }
    }
}

#[test]
fn transpose_3d() {
    let mut array = NDArray::<f64>::new(&[3, 4, 5], 0.0);
    for i in 0..3 {
        for j in 0..4 {
            for k in 0..5 {
                array[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }
    array.transpose();
    for i in 0..3 {
        for j in 0..4 {
            for k in 0..5 {
                assert!(array[&[k,j,i]] == (i * 3 + j * 5 + k * 7) as f64);
            }
        }
    }
}

#[test]
fn equality() {
    assert!(NDArray::<u8>::new(&[3, 3, 3], 0) == NDArray::<u8>::new(&[3, 3, 3], 0));
    assert!(NDArray::<u8>::new(&[3, 3, 3], 0) != NDArray::<u8>::new(&[3, 3], 0));
    assert!(NDArray::<u8>::new(&[3, 4], 0) != NDArray::<u8>::new(&[3, 3], 0));
    assert!(NDArray::<u8>::new(&[3], 0) != NDArray::<u8>::new(&[3], 1));
    assert!(NDArray::<u8>::new(&[4, 3], 0).slice(&[1]) == NDArray::<u8>::new(&[2, 3], 0).slice(&[1]));
}

#[test]
fn assignement() {
    let mut array3d = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    let mut array2d = NDArray::<f64>::new(&[3, 3], 0.0);
    for i in 0..3 {
        for j in 0..3 {
            array2d[&[i, j]] = (i * 3 + j * 5) as f64;
        }
    }
    for i in 0..3 {
        array3d.slice_mut(&[i]).assign(&array2d);
    }
    for i in 0..3 {
        for j in 0..3 {
            for k in 0..3 {
                assert!(array3d[&[i,j,k]] == (j * 3 + k * 5) as f64);
            }
        }
    }
}

#[test]
fn insert() {
    let mut array1d = NDArray::<f64>::new(&[3], 0.0);
    let mut array2d = NDArray::<f64>::new(&[3, 3], 0.0);
    let mut array3d = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    
    array1d.insert(0, 1, &NDArray::<f64>::new(&[1], 1.0));
    assert_eq!(array1d[&[1]], 1.0);

    array2d.insert(0, 1, &NDArray::<f64>::new(&[1, 3], 1.0));
    for i in 0..3 {
        assert_eq!(array2d[&[1, i]], 1.0);
    }
    array2d.insert(1, 1, &NDArray::<f64>::new(&[4, 1], 1.0));
    for i in 0..4 {
        assert_eq!(array2d[&[i, 1]], 1.0);
    }

    array3d.insert(0, 1, &NDArray::<f64>::new(&[1, 3, 3], 1.0));
    for i in 0..3 {
        for j in 0..3 {
            assert_eq!(array3d[&[1, i, j]], 1.0);
        }
    }
    array3d.insert(1, 1, &NDArray::<f64>::new(&[4, 1, 3], 1.0));
    for i in 0..4 {
        for j in 0..3 {
            assert_eq!(array3d[&[i, 1, j]], 1.0);
        }
    }
    array3d.insert(2, 1, &NDArray::<f64>::new(&[4, 4, 1], 1.0));
    for i in 0..4 {
        for j in 0..4 {
            assert_eq!(array3d[&[i, j, 1]], 1.0);
        }
    }
}

#[test]
fn extract() {
    let mut array1d = NDArray::<f64>::new(&[4], 0.0);
    let mut array2d = NDArray::<f64>::new(&[4, 4], 0.0);
    let mut array3d = NDArray::<f64>::new(&[4, 4, 4], 0.0);

    for i in 0..4 {
        array1d[&[i]] = (i * 3) as f64;
        for j in 0..4 {
            array2d[&[i, j]] = (i * 3 + j * 5) as f64;
            for k in 0..4 {
                array3d[&[i, j, k]] = (i * 3 + j * 5 + k * 7) as f64;
            }
        }
    }

    let extracted1d = array1d.extract(&[1], &[3]);
    let extracted2d = array2d.extract(&[1,1], &[3,3]);
    let extracted3d = array3d.extract(&[1,1,1], &[3,3,3]);

    for i in 0..2 {
        assert_eq!(extracted1d[&[i]], ((i+1) * 3) as f64);
        for j in 0..2 {
            assert_eq!(extracted2d[&[i, j]], ((i+1) * 3 + (j+1) * 5) as f64);
            for k in 0..2 {
                assert_eq!(extracted3d[&[i, j, k]], ((i+1) * 3 + (j+1) * 5 + (k+1) * 7) as f64);
            }
        }
    }
}

#[test]
fn remove() {
    let mut array1d = NDArray::<f64>::new(&[3], 0.0);
    let mut array2d = NDArray::<f64>::new(&[3, 3], 0.0);
    let mut array3d = NDArray::<f64>::new(&[3, 3, 3], 0.0);
    
    array1d.insert(0, 1, &NDArray::<f64>::new(&[1], 1.0));
    array1d.remove(0, 1, 2);
    assert!(array1d == NDArray::<f64>::new(&[3], 0.0)); 

    array2d.insert(0, 1, &NDArray::<f64>::new(&[1, 3], 1.0));
    array2d.insert(1, 1, &NDArray::<f64>::new(&[4, 1], 1.0));
    array2d.remove(1, 1, 2);
    array2d.remove(0, 1, 2);
    assert!(array2d == NDArray::<f64>::new(&[3, 3], 0.0)); 

    array3d.insert(0, 1, &NDArray::<f64>::new(&[1, 3, 3], 1.0));
    array3d.insert(1, 1, &NDArray::<f64>::new(&[4, 1, 3], 1.0));
    array3d.insert(2, 1, &NDArray::<f64>::new(&[4, 4, 1], 1.0));
    array3d.remove(2, 1, 2);
    array3d.remove(1, 1, 2);
    array3d.remove(0, 1, 2);
    assert!(array3d == NDArray::<f64>::new(&[3, 3, 3], 0.0)); 
}

#[test]
fn insert_split() {
    let mut array1d = NDArray::<f64>::new(&[3], 0.0);
    let mut array2d = NDArray::<f64>::new(&[3, 3], 0.0);
    let mut array3d = NDArray::<f64>::new(&[3, 3, 3], 0.0);
 
    array1d.insert(0, 3, &NDArray::<f64>::new(&[2], 1.0));
    assert!(array1d.split(0, 3) == NDArray::<f64>::new(&[2], 1.0));
    assert!(array1d == NDArray::<f64>::new(&[3], 0.0));
    array2d.insert(1, 3, &NDArray::<f64>::new(&[3, 2], 1.0));
    assert!(array2d.split(1, 3) == NDArray::<f64>::new(&[3, 2], 1.0));
    assert!(array2d == NDArray::<f64>::new(&[3, 3], 0.0));
    array3d.insert(2, 3, &NDArray::<f64>::new(&[3, 3, 2], 1.0));
    assert!(array3d.split(2, 3) == NDArray::<f64>::new(&[3, 3, 2], 1.0));
    assert!(array3d == NDArray::<f64>::new(&[3, 3, 3], 0.0));
}