ndarray 0.7.0-alpha.0

An N-dimensional array for general elements and for numerics. Lightweight array views and slicing; views support chunking and splitting.
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

#![cfg(any(feature = "rustc-serialize", feature = "serde"))]
#[cfg(feature = "rustc-serialize")]
extern crate rustc_serialize as serialize;

#[macro_use] extern crate ndarray;

#[cfg(feature = "serde")]
extern crate serde;

#[cfg(feature = "serde")]
extern crate serde_json;

#[cfg(feature = "rustc-serialize")]
use serialize::json;

use ndarray::{arr0, arr1, arr2, RcArray, RcArray1, RcArray2};

#[cfg(feature = "rustc-serialize")]
#[test]
fn serial_many_dim()
{
    {
        let a = arr0::<f32>(2.72);
        let serial = json::encode(&a).unwrap();
        println!("Encode {:?} => {:?}", a, serial);
        let res = json::decode::<RcArray<f32, _>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }

    {
        let a = arr1::<f32>(&[2.72, 1., 2.]);
        let serial = json::encode(&a).unwrap();
        println!("Encode {:?} => {:?}", a, serial);
        let res = json::decode::<RcArray1<f32>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }

    {
        let a = arr2(&[[3., 1., 2.2], [3.1, 4., 7.]]);
        let serial = json::encode(&a).unwrap();
        println!("Encode {:?} => {:?}", a, serial);
        let res = json::decode::<RcArray2<f32>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
        let text = r##"{"v":1,"dim":[2,3],"data":[3,1,2.2,3.1,4,7]}"##;
        let b = json::decode::<RcArray2<f32>>(text);
        assert_eq!(a, b.unwrap());
    }


    {
        // Test a sliced array.
        let mut a = RcArray::linspace(0., 31., 32).reshape((2, 2, 2, 4));
        a.islice(s![..;-1, .., .., ..2]);
        let serial = json::encode(&a).unwrap();
        println!("Encode {:?} => {:?}", a, serial);
        let res = json::decode::<RcArray<f32, _>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }
}

#[cfg(feature = "rustc-serialize")]
#[test]
fn serial_wrong_count()
{
    // one element too few
    let text = r##"{"v":1,"dim":[2,3],"data":[3,1,2.2,3.1,4]}"##;
    let arr = json::decode::<RcArray2<f32>>(text);
    println!("{:?}", arr);
    assert!(arr.is_err());

    // future version
    let text = r##"{"v":200,"dim":[2,3],"data":[3,1,2.2,3.1,4,7]}"##;
    let arr = json::decode::<RcArray2<f32>>(text);
    println!("{:?}", arr);
    assert!(arr.is_err());
}

#[cfg(feature = "serde")]
#[test]
fn serial_many_dim_serde()
{
    {
        let a = arr0::<f32>(2.72);
        let serial = serde_json::to_string(&a).unwrap();
        println!("Serde encode {:?} => {:?}", a, serial);
        let res = serde_json::from_str::<RcArray<f32, _>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }

    {
        let a = arr1::<f32>(&[2.72, 1., 2.]);
        let serial = serde_json::to_string(&a).unwrap();
        println!("Serde encode {:?} => {:?}", a, serial);
        let res = serde_json::from_str::<RcArray1<f32>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }

    {
        let a = arr2(&[[3., 1., 2.2], [3.1, 4., 7.]]);
        let serial = serde_json::to_string(&a).unwrap();
        println!("Serde encode {:?} => {:?}", a, serial);
        let res = serde_json::from_str::<RcArray2<f32>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
        let text = r##"{"v":1,"dim":[2,3],"data":[3,1,2.2,3.1,4,7]}"##;
        let b = serde_json::from_str::<RcArray2<f32>>(text);
        assert_eq!(a, b.unwrap());
    }

    {
        // Test a sliced array.
        let mut a = RcArray::linspace(0., 31., 32).reshape((2, 2, 2, 4));
        a.islice(s![..;-1, .., .., ..2]);
        let serial = serde_json::to_string(&a).unwrap();
        println!("Encode {:?} => {:?}", a, serial);
        let res = serde_json::from_str::<RcArray<f32, _>>(&serial);
        println!("{:?}", res);
        assert_eq!(a, res.unwrap());
    }
}

#[cfg(feature = "serde")]
#[test]
fn serial_wrong_count_serde()
{
    // one element too few
    let text = r##"{"v":1,"dim":[2,3],"data":[3,1,2.2,3.1,4]}"##;
    let arr = serde_json::from_str::<RcArray2<f32>>(text);
    println!("{:?}", arr);
    assert!(arr.is_err());

    // future version
    let text = r##"{"v":200,"dim":[2,3],"data":[3,1,2.2,3.1,4,7]}"##;
    let arr = serde_json::from_str::<RcArray2<f32>>(text);
    println!("{:?}", arr);
    assert!(arr.is_err());
}