ndarray not getting value as expected.

[softmarshmallow]

im trying to create a list with some specific rules.
ex ) x :2, y:5
0, 0
0, 1
0, 2
0, 3
0, 4
1, 0
1, 1
1, 2
1, 3
1, 4

it should have 2 sets, y should be repeated for x times.
so the table shape should be [2, x * y].
1D data should look like [0, 1, 0, 2, 0, 3, 0, 4, 1, 0, 1, 1, 1, 2, 1, 3, 1, 4]

it works fine until here but when i try to get myNdarray.get(0, 5), i expected 1 but gives 2 instead.

    let x = 2;
    let y = 4;

    let datArr = []
    for (let xx = 0; xx < x; xx++){
        for (let yy = 0; yy < y; yy++){
            datArr.push(xx)
            datArr.push(yy)
            // narr.
        }
    }
    let narr = ndarray(new Float32Array(datArr), [2, x*y]);
    console.log(narr)
    console.log(narr.get(0, 5))
    console.log(narr.get(1, 5))

here is my test code, and

this is the log

NdArrayTest.js:35 View2dfloat32 {data: Float32Array(20), shape: Array(2), stride: Array(2), offset: 0}data: Float32Array(20) [0, 0, 0, 1, 0, 2, 0, 3, 0, 4, 1, 0, 1, 1, 1, 2, 1, 3, 1, 4]offset: 0shape: (2) [2, 10]stride: (2) [10, 1]order: (...)size: (...)proto: Object
NdArrayTest.js:36 2
NdArrayTest.js:37 2

what is happening?
am i using the wrong code?

[rreusser]

The first thing that jumps out is the possibility of mistakes when making assumptions about the 1D data buffer. Can you use .set() instead and examine narr.data to see what it looks like instead of passing the data buffer directly? It's very slightly slower, but for the majority cases is equivalent and at least much less error-prone.

[wangzhuwei212003]

First，if you want x = 2, y = 5, the value of y in you code should be 5 not 4.
If

[
  [0, 0, 0, 1, 0, 2, 0, 3, 0, 4],
  [1, 0, 1, 1, 1, 2, 1, 3, 1, 4]
]

is the normal array you want, then it is.

narr.get(0, 5) is 2, I dont know why you expect 1 ? narr.get(1, 5) is also 2.