ha-ndarray 0.5.0

A hardware-accelerated n-dimensional array
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use ha_ndarray::*;

#[test]
fn test_broadcast_small() -> Result<(), Error> {
    let data = vec![5, 1];
    let strides = ArrayBuf::new(data.to_vec(), shape![2])?.broadcast(shape![1, 2])?;
    assert_eq!(&*strides.buffer()?.to_slice()?, &data);
    Ok(())
}

#[test]
fn test_broadcast_large() -> Result<(), Error> {
    let input = ArrayBuf::new(vec![1u32; 600], shape![300, 1, 2])?;
    let output = input.broadcast(shape![300, 250, 2])?;
    assert_eq!(output.shape(), &[300, 250, 2]);
    assert_eq!(output.sum_all()?, 150000);
    Ok(())
}

#[test]
fn test_flip() -> Result<(), Error> {
    let shape = shape![2, 3];
    let source = ArrayBuf::new(vec![0, 1, 2, 3, 4, 5], shape.clone())?;

    let flip0_expected = ArrayBuf::new(vec![3, 4, 5, 0, 1, 2], shape.clone())?;
    let flip0_actual = source.clone().flip(0)?;
    assert!(flip0_expected.eq(flip0_actual)?.all()?);

    let flip1_expected = ArrayBuf::new(vec![2, 1, 0, 5, 4, 3], shape)?;
    let flip1_actual = source.flip(1)?;
    assert!(flip1_expected.eq(flip1_actual)?.all()?);

    Ok(())
}

#[test]
fn test_slice_1d() -> Result<(), Error> {
    let input = ArrayOp::range(0, 4, shape![4])?;

    let expected = ArrayOp::range(1, 3, shape![2])?;

    let actual = input.slice(range![(1..3).into()])?;

    assert_eq!(expected.shape(), actual.shape());
    assert!(expected.eq(actual)?.all()?);

    Ok(())
}

#[test]
fn test_slice_2d() -> Result<(), Error> {
    let input = ArrayOp::range(0, 12, shape![4, 3])?;
    let expected = ArrayOp::range(3, 9, shape![2, 3])?;

    let actual = input.slice(range![(1..3).into()])?;

    assert_eq!(expected.shape(), actual.shape());
    assert!(
        expected.as_ref().eq(actual.as_ref())?.all()?,
        "expected {:?} but found {:?}",
        expected.buffer()?.to_slice()?,
        actual.buffer()?.to_slice()?
    );

    Ok(())
}

#[test]
fn test_slice_and_write() -> Result<(), Error> {
    let mut input = ArrayBuf::constant(0, shape![512])?;
    let mut slice = input.as_mut().slice(range![(128..256).into()])?;
    slice.write_value(1)?;

    let expected = std::iter::repeat_n(0, 128)
        .chain(std::iter::repeat_n(1, 128))
        .chain(std::iter::repeat_n(0, 256))
        .collect::<Vec<_>>();

    let actual = input.buffer()?.to_slice()?;

    assert_eq!(expected, &*actual);

    Ok(())
}

#[test]
fn test_slice_3d() -> Result<(), Error> {
    let input = ArrayOp::range(0, 24, shape![4, 3, 2])?;

    let expected = ArrayBuf::new(vec![8, 9, 10, 11], shape![2, 2])?;

    let actual = input.slice(range![1.into(), (1..3).into()])?;

    assert_eq!(expected.shape(), actual.shape());
    assert!(expected.eq(actual)?.all()?);

    Ok(())
}

#[test]
fn test_transpose_2d() -> Result<(), Error> {
    let input = ArrayOp::range(0, 6, shape![2, 3])?;

    let expected = ArrayBuf::new(
        vec![
            0, 3, //
            1, 4, //
            2, 5, //
        ],
        shape![3, 2],
    )?;

    let actual = input.transpose(None)?;
    assert_eq!(expected.shape(), actual.shape());
    assert!(expected.eq(actual)?.all()?);

    Ok(())
}

#[test]
fn test_transpose_3d() -> Result<(), Error> {
    let input = ArrayOp::range(0, 24, shape![2, 3, 4])?;

    let expected = ArrayBuf::new(
        vec![
            0, 4, 8, //
            12, 16, 20, //
            1, 5, 9, //
            13, 17, 21, //
            //
            2, 6, 10, //
            14, 18, 22, //
            3, 7, 11, //
            15, 19, 23, //
        ],
        shape![4, 2, 3],
    )?;

    let actual = input.transpose(Some(axes![2, 0, 1]))?;
    assert!(expected.eq(actual)?.all()?);

    Ok(())
}

#[test]
fn test_offsets_to_coords() -> Result<(), Error> {
    let coords = ArrayBuf::new(stackvec![0, 1], shape![1, 2])?;
    let strides = ArrayBuf::new(vec![5, 1], shape![2])?.broadcast(coords.shape().into())?;
    let offsets = coords.mul(strides).map(ArrayAccess::from)?;
    let offsets = offsets.sum(axes![1], false)?;
    assert_eq!(offsets.buffer()?.to_slice()?.into_vec(), vec![1]);
    Ok(())
}