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1122 lines (1017 loc) · 45.4 KB
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using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Numpy;
using Numpy.Models;
using Python.Runtime;
using Assert = NUnit.Framework.Assert;
namespace Numpy.UnitTest
{
[TestClass]
public class NumpyTest
{
[AssemblyCleanup()]
public static void AssemblyCleanup()
{
PythonEngine.BeginAllowThreads();
}
[TestMethod]
public void empty()
{
// initialize an array with random integers
var a = np.empty(new Shape(2, 3), np.int32);
Console.WriteLine(a.repr);
Assert.IsNotNull(a.ToString());
// this should print out the exact integers of the array
foreach (var x in a.GetData<int>())
Console.WriteLine(x);
}
[TestMethod]
public unsafe void create_from_pointer_without_copying()
{
IntPtr pointer = IntPtr.Zero;
try {
var dtype = np.int32;
const int length = 1024;
pointer = Marshal.AllocHGlobal(length);
var ptr = (int*)pointer;
// fill the buffer with index numbers
for (int i = 0; i < length / sizeof(int); i++)
ptr[i] = i;
var a = new NDarray(pointer, length, dtype);
Console.WriteLine(a.ToString());
var b = np.arange(length / sizeof(int));
Console.WriteLine(b);
var truth1 = b.Equals(a);
var truth2 = a.Equals(b);
Assert.AreEqual(b, a);
}
finally {
if (pointer != IntPtr.Zero)
Marshal.FreeHGlobal(pointer);
}
}
[TestMethod]
public void efficient_array_copy()
{
var a = np.empty(new Shape(2, 3), np.int32);
Console.WriteLine(a.repr);
Assert.IsNotNull(a.ToString());
long ptr = a.PyObject.ctypes.data;
Console.WriteLine("ptr: " + ptr);
var array = new int[] { 1, 2, 3, 4, 5, 6 };
Marshal.Copy(array, 0, new IntPtr(ptr), array.Length);
Console.WriteLine(a.ToString());
}
[TestMethod]
public void array()
{
var array = new int[] { 1, 2, 3, 4, 5, 6 };
var a = np.array(array);
Console.WriteLine(a.repr);
Assert.AreEqual(array, a.GetData());
}
[TestMethod]
public void ndarray_shape()
{
var array = new int[] { 1, 2, 3, 4, 5, 6 };
var a = np.array(array);
Assert.AreEqual(new Shape(6), a.shape);
Assert.AreEqual(new Shape(100), np.arange(100).shape);
}
[TestMethod]
public void ndarray_strides()
{
Assert.AreEqual(new int[] { 4 }, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).strides);
Assert.AreEqual(new int[] { 8 }, np.arange(10, dtype: np.longlong).strides);
}
[TestMethod]
public void ndarray_ndim()
{
Assert.AreEqual(1, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).ndim);
Assert.AreEqual(1, np.arange(10, dtype: np.longlong).ndim);
}
[TestMethod]
public void ndarray_size()
{
Assert.AreEqual(6, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).size);
Assert.AreEqual(10, np.arange(10, dtype: np.longlong).size);
}
[TestMethod]
public void ndarray_len()
{
Assert.AreEqual(6, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).len);
Assert.AreEqual(10, np.arange(10, dtype: np.longlong).len);
}
[TestMethod]
public void ndarray_itemsize()
{
Assert.AreEqual(4, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).itemsize);
Assert.AreEqual(8, np.arange(10, dtype: np.longlong).itemsize);
}
[TestMethod]
public void ndarray_nbytes()
{
Assert.AreEqual(24, np.array(new int[] { 1, 2, 3, 4, 5, 6 }).nbytes);
Assert.AreEqual(80, np.arange(10, dtype: np.longlong).nbytes);
}
[TestMethod]
public void ndarray_base()
{
var a = np.array(new int[] { 1, 2, 3, 4, 5, 6 });
var b = a.reshape(new Shape(2, 3));
Assert.AreEqual(null, a.@base);
Assert.AreEqual(a, b.@base);
}
[TestMethod]
public void ndarray_dtype()
{
Assert.AreEqual(np.int32, np.array(new int[] { 1, 2, 3, 4, 5, 6 }, dtype: np.int32).dtype);
Assert.AreEqual(np.longlong, np.arange(10, dtype: np.longlong).dtype);
Assert.AreEqual(np.float32, np.arange(10, dtype: np.float32).dtype);
Assert.AreEqual(np.@double, np.arange(10, dtype: np.float64).dtype);
}
[TestMethod]
public void ndarray_multidim_source_array()
{
var a = np.array(new float[,] { { 1f, 2f }, { 3f, 4f }, { 3f, 4f } });
Console.WriteLine(a.repr);
Assert.AreEqual(new Shape(3, 2), a.shape);
Assert.AreEqual(np.float32, a.dtype);
}
[TestMethod]
public void ndarray_T()
{
var x = np.array(new float[,] { { 1f, 2f }, { 3f, 4f } });
Assert.AreEqual("[[1. 2.]\n [3. 4.]]", x.ToString());
var t = x.T;
Console.WriteLine(t.repr);
Assert.AreEqual("[[1. 3.]\n [2. 4.]]", t.ToString());
// getting data of transposed array returns transposed array!
Assert.AreEqual(new[] { 1f, 3f, 2f, 4f }, t.GetData<float>());
}
[TestMethod]
public void ndarray_flatten()
{
var x = np.array(new float[,] { { 1f, 2f }, { 3f, 4f } });
Assert.AreEqual("[1. 2. 3. 4.]", x.flatten().ToString());
var t = x.T;
Assert.AreEqual("[1. 3. 2. 4.]", t.flatten().ToString());
Assert.AreEqual(new[] { 1f, 3f, 2f, 4f }, t.flatten().GetData<float>());
}
[TestMethod]
public void ndarray_reshape()
{
var a = np.array(new int[] { 1, 2, 3, 4, 5, 6 });
var b = a.reshape(new Shape(2, 3));
Assert.AreEqual("[[1 2 3]\n [4 5 6]]", b.str);
Assert.AreEqual(new Shape(2, 3), b.shape);
Assert.AreEqual(null, a.@base);
Assert.AreEqual(a, b.@base);
}
[TestMethod]
public void ndarray_indexing()
{
// using string indices
var x = np.arange(10);
Assert.AreEqual("2", x["2"].str);
Assert.AreEqual("8", x["-2"].str);
Assert.AreEqual("[2 3 4 5 6 7]", x["2:-2"].str);
var y = x.reshape(new Shape(2, 5));
Assert.AreEqual("8", y["1,3"].str);
Assert.AreEqual("9", y["1,-1"].str);
Assert.AreEqual("array([0, 1, 2, 3, 4])", y["0"].repr);
Assert.AreEqual("2", y["0"]["2"].str);
}
[TestMethod]
public void ndarray_indexing1()
{
// using int indices
var x = np.arange(10);
Assert.AreEqual("2", x[2].str);
Assert.AreEqual("8", x[-2].str);
var y = x.reshape(new Shape(2, 5));
Assert.AreEqual("8", y[1, 3].str);
Assert.AreEqual("9", y[1, -1].str);
Assert.AreEqual("array([0, 1, 2, 3, 4])", y[0].repr);
Assert.AreEqual("2", y[0][2].str);
}
[TestMethod]
public void ndarray_indexing2()
{
var x = np.arange(10, 1, -1);
Assert.AreEqual("array([10, 9, 8, 7, 6, 5, 4, 3, 2])", x.repr);
Assert.AreEqual("array([7, 7, 9, 2])", x[np.array(new[] { 3, 3, 1, 8 })].repr);
Assert.AreEqual("array([7, 7, 4, 2])", x[np.array(new[] { 3, 3, -3, 8 })].repr);
Assert.AreEqual("array([[9, 9],\n [8, 7]])", x[np.array(new int[,] { { 1, 1 }, { 2, 3 } })].repr);
}
[TestMethod]
public void ndarray_indexing3()
{
var y = np.arange(35).reshape(5, 7);
Assert.AreEqual("array([ 0, 15, 30])", y[np.array(0, 2, 4), np.array(0, 1, 2)].repr);
Assert.AreEqual("array([ 1, 15, 29])", y[np.array(0, 2, 4), 1].repr);
Assert.AreEqual(
"array([[ 0, 1, 2, 3, 4, 5, 6],\n [14, 15, 16, 17, 18, 19, 20],\n [28, 29, 30, 31, 32, 33, 34]])",
y[np.array(0, 2, 4)].repr);
}
[TestMethod]
public void ndarray_indexing_setter1()
{
// using int indices
var x = np.arange(10);
Assert.AreEqual("2", x[2].str);
x[2] = (NDarray)22;
Assert.AreEqual("22", x[2].str);
Assert.AreEqual("8", x[-2].str);
x[-2] = (NDarray)88;
Assert.AreEqual("88", x[-2].str);
var y = x.reshape(new Shape(2, 5));
Assert.AreEqual("88", y[1, 3].str);
y[1, 3] = (NDarray)888;
Assert.AreEqual("888", y[1, 3].str);
Assert.AreEqual("array([ 0, 1, 22, 3, 4])", y[0].repr);
Assert.AreEqual("22", y[0][2].str);
y[0][2] = (NDarray)222;
Assert.AreEqual("222", y[0][2].str);
}
[TestMethod]
public void ndarray_indexing_setter2()
{
// using string indices
var x = np.arange(10);
Assert.AreEqual("2", x[2].str);
x["2"] = (NDarray)22;
Assert.AreEqual("22", x[2].str);
Assert.AreEqual("8", x[-2].str);
x["-2"] = (NDarray)88;
Assert.AreEqual("88", x[-2].str);
var y = x.reshape(new Shape(2, 5));
Assert.AreEqual("88", y[1, 3].str);
y["1, 3"] = (NDarray)888;
Assert.AreEqual("888", y[1, 3].str);
Assert.AreEqual("array([ 0, 1, 22, 3, 4])", y[0].repr);
Assert.AreEqual("22", y[0][2].str);
y["0"]["2"] = (NDarray)222;
Assert.AreEqual("222", y[0][2].str);
}
[TestMethod]
public void ndarray_indexing_setter3()
{
var a = np.array(new int[] { 1, 2, 3, 4, 5, 6 }).reshape(new Shape(2, 3));
Assert.AreEqual("[[1 2 3]\n [4 5 6]]", a.str);
a[":", 1] = a[":", 1] * 2;
Assert.AreEqual("[[ 1 4 3]\n [ 4 10 6]]", a.str);
}
[TestMethod]
public void ndarray_indexing_setter4()
{
var x = np.arange(10, 1, -1);
Assert.AreEqual("array([10, 9, 8, 7, 6, 5, 4, 3, 2])", x.repr);
Assert.AreEqual("array([7, 7, 9, 2])", x[np.array(new[] { 3, 3, 1, 8 })].repr);
x[np.array(new[] { 3, 3, 1, 8 })] = np.arange(4);
Assert.AreEqual("array([10, 2, 8, 1, 6, 5, 4, 3, 3])", x.repr);
}
[TestMethod]
public void ndarray_slice()
{
var x = np.arange(10);
Assert.AreEqual("array([2, 3, 4])", x["2:5"].repr);
Assert.AreEqual("array([0, 1, 2])", x[":-7"].repr);
Assert.AreEqual("array([1, 3, 5])", x["1:7:2"].repr);
var y = np.arange(35).reshape(new Shape(5, 7));
Assert.AreEqual("array([[ 7, 10, 13],\n [21, 24, 27]])", y["1:5:2,::3"].repr);
}
[TestMethod]
public void ndarray_slice1()
{
var y = np.arange(35).reshape(5, 7);
var b = y > 20;
Assert.AreEqual(
"array([[ 1, 2],\n" +
" [15, 16],\n" +
" [29, 30]])",
y[np.array(0, 2, 4), "1:3"].repr);
Assert.AreEqual("array([[22, 23],\n [29, 30]])", y[b[":", 5], "1:3"].repr);
}
[TestMethod]
public void ndarray_masking()
{
var y = np.arange(35).reshape(5, 7);
var b = y > 20;
Assert.AreEqual("array([21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34])", y[b].repr);
// use a 1-D boolean whose first dim agrees with the first dim of y
Assert.AreEqual("array([False, False, False, True, True])", b[":", 5].repr);
Assert.AreEqual("array([[21, 22, 23, 24, 25, 26, 27],\n [28, 29, 30, 31, 32, 33, 34]])", y[b[":", 5]].repr);
}
[TestMethod]
public void ndarray_masking1()
{
var x = np.arange(30).reshape(2, 3, 5);
Assert.AreEqual(
"array([[[ 0, 1, 2, 3, 4],\n" +
" [ 5, 6, 7, 8, 9],\n" +
" [10, 11, 12, 13, 14]],\n\n" +
" [[15, 16, 17, 18, 19],\n" +
" [20, 21, 22, 23, 24],\n" +
" [25, 26, 27, 28, 29]]])",
x.repr);
var b = np.array(new[,] { { true, true, false }, { false, true, true } });
Assert.AreEqual(
"array([[ 0, 1, 2, 3, 4],\n" +
" [ 5, 6, 7, 8, 9],\n" +
" [20, 21, 22, 23, 24],\n" +
" [25, 26, 27, 28, 29]])",
x[b].repr);
}
[TestMethod]
public void ndarray_comparison_operators()
{
var a = np.array(1, 2, 3);
// comparison with a scalar
Assert.AreEqual(new[] { true, false, false }, (a < 2).GetData());
Assert.AreEqual(new[] { true, true, false }, (a <= 2).GetData());
Assert.AreEqual(new[] { false, false, true }, (a > 2).GetData());
Assert.AreEqual(new[] { false, true, true }, (a >= 2).GetData());
Assert.AreEqual(new[] { false, true, false }, (a.equals(2)).GetData());
Assert.AreEqual(new[] { true, false, true }, (a.not_equals(2)).GetData());
// comparison with an array
var b = (np.ones(new Shape(3), np.int32) * 2);
Assert.AreEqual(new[] { true, false, false }, (a < b).GetData());
Assert.AreEqual(new[] { true, true, false }, (a <= b).GetData());
Assert.AreEqual(new[] { false, false, true }, (a > b).GetData());
Assert.AreEqual(new[] { false, true, true }, (a >= b).GetData());
Assert.AreEqual(new[] { false, true, false }, (a.equals(b)).GetData());
Assert.AreEqual(new[] { true, false, true }, (a.not_equals(b)).GetData());
}
[TestMethod]
public void ndarray_unary_operators()
{
// unary operations
var a = np.array(1, 2, 3);
Assert.AreEqual(new[] { -1, -2, -3 }, (-a).GetData<int>());
Assert.AreEqual(new[] { 1, 2, 3 }, (+a).GetData<int>());
// todo: test operator ~
}
[TestMethod]
public void ndarray_arithmetic_operators()
{
// arithmetic operators
var a = np.array(1, 2, 3);
var b = (np.ones(new Shape(3), np.int32) * 2);
Assert.AreEqual(new[] { 11, 12, 13 }, (a + 10).GetData<int>());
Assert.AreEqual(new[] { 3, 4, 5 }, (a + b).GetData<int>());
Assert.AreEqual(new[] { -9, -8, -7 }, (a - 10).GetData<int>());
Assert.AreEqual(new[] { -1, 0, 1 }, (a - b).GetData<int>());
Assert.AreEqual(new[] { 10, 20, 30 }, (a * 10).GetData<int>());
Assert.AreEqual(new[] { 2, 4, 6 }, (a * b).GetData<int>());
a = np.array(2, 4, 16);
Assert.AreEqual(new[] { 1, 2, 8 }, (a / 2).GetData<double>());
Assert.AreEqual(new[] { 1, 2, 8 }, (a / b).GetData<double>());
Assert.AreEqual(new[] { 4, 2, .5 }, (8 / a).GetData<double>());
Assert.AreEqual(new[] { 4, 2, -10 }, (6 - a).GetData<int>());
}
[TestMethod]
public void ndarray_arithmetic_inplace_operators()
{
var a = np.array(1, 2, 3);
var b = (np.ones(new Shape(3), np.int32) * 2);
a.iadd(10);
Assert.AreEqual(new[] { 11, 12, 13 }, a.GetData<int>());
a.isub(10);
Assert.AreEqual(new[] { 1, 2, 3 }, a.GetData<int>());
a.iadd(b);
Assert.AreEqual(new[] { 3, 4, 5 }, a.GetData<int>());
a.isub(b);
Assert.AreEqual(new[] { 1, 2, 3 }, a.GetData<int>());
}
[TestMethod]
public void ndarray_value_div_ndarray()
{
// division operator
var a = np.array(1.0, 2.0, 3.0);
Assert.AreEqual(new[] { 0.5, 1.0, 1.5 }, (a / 2.0).GetData<double>());
Assert.AreEqual(new[] { 6.0, 3.0, 2.0 }, (6.0 / a).GetData<double>());
// minus operator
Assert.AreEqual(new[] { -1.0, 0.0, 1.0 }, (a - 2.0).GetData<double>());
Assert.AreEqual(new[] { 1.0, 0.0, -1.0 }, (2.0 - a).GetData<double>());
}
[TestMethod]
public void np_where()
{
//>>> import numpy as np
//>>> a = [1, 2, 3, 4, 0, 0, 1, 2]
//>>> a = np.array(a)
//>>> b = np.where(a == 0)
//>>> b[0]
//array([4, 5], dtype = int64)
var a = np.array(new[] { 1, 2, 3, 4, 0, 0, 1, 2 });
var b = np.where(a.equals(0));
Assert.AreEqual("array([4, 5], dtype=int64)", b[0].repr);
}
[TestMethod]
public void GetData_noncontiguous()
{
int[,] X = new int[3, 3];
X[0, 0] = -1;
NDarray npX = np.array(X, dtype: np.int32); // control
NDarray npY = np.array(X, dtype: np.int32); // test
Console.WriteLine("Control:");
Console.WriteLine(npX);
Console.WriteLine("Test:");
Console.WriteLine(npY);
// flip on the row axis
npY = np.flip(npY, new int[] { 0 });
Console.WriteLine("Test flipped on axis 0:");
Console.WriteLine(npY);
// get their data
int[] cX = npX.GetData<int>();
int[] cY = npY.GetData<int>();
Console.WriteLine("Control extracted back to C#:\n" + string.Join(" ", cX));
Assert.AreEqual("-1 0 0 0 0 0 0 0 0", string.Join(" ", cX));
Console.WriteLine("Test extracted back to C#:\n" + string.Join(" ", cY));
Assert.AreEqual("0 0 0 0 0 0 -1 0 0", string.Join(" ", cY));
}
[TestMethod]
public void CopyDataInAndOutExample()
{
var a = np.array(new[] { 2, 4, 9, 25 });
Console.WriteLine("a: " + a.repr);
// a: array([ 2, 4, 9, 25])
var roots = np.sqrt(a);
Console.WriteLine(roots.repr);
// array([1.41421356, 2. , 3. , 5. ])
Assert.AreEqual("array([1.41421356, 2. , 3. , 5. ])", roots.repr);
Console.WriteLine(string.Join(", ", roots.GetData<int>()));
// 1719614413, 1073127582, 0, 1073741824
Console.WriteLine("roots.dtype: " + roots.dtype);
// roots.dtype: float64
Console.WriteLine(string.Join(", ", roots.GetData<double>()));
// 1.4142135623731, 2, 3, 5
Assert.AreEqual(new double[] { 1.41, 2, 3, 5 }, roots.GetData<double>().Select(x => Math.Round(x, 2)).ToArray());
}
[TestMethod]
public void QuestionByPiyushspss()
{
// np.column_stack(np.where(mat > 0))
//>>> a = np.array([1, 0, 0, 1, 2, 3, 0, 1]).reshape(2, 4)
// >>> a
//array([[1, 0, 0, 1],
// [2, 3, 0, 1]])
//>>> np.column_stack(a)
//array([[1, 2],
// [0, 3],
// [0, 0],
// [1, 1]])
//>>> np.where(a > 0)
//(array([0, 0, 1, 1, 1], dtype = int64), array([0, 3, 0, 1, 3], dtype = int64))
//>>> np.column_stack(np.where(a > 0))
//array([[0, 0],
// [0, 3],
// [1, 0],
// [1, 1],
// [1, 3]], dtype = int64)
//>>>
var a = np.array(new[] { 1, 0, 0, 1, 2, 3, 0, 1 }).reshape(2, 4);
var expected =
"array([[1, 2],\n" +
" [0, 3],\n" +
" [0, 0],\n" +
" [1, 1]])";
Assert.AreEqual(expected, np.column_stack(a).repr);
// note: this was a bug, now you don't get a python tuple back, but an array of NDarrays instead so the following line just doesn't compile any more
//Assert.AreEqual("(array([0, 0, 1, 1, 1], dtype=int64), array([0, 3, 0, 1, 3], dtype=int64))", np.where(a > 0).repr);
expected =
"array([[0, 0],\n" +
" [0, 3],\n" +
" [1, 0],\n" +
" [1, 1],\n" +
" [1, 3]], dtype=int64)";
Assert.AreEqual(expected, np.column_stack(np.where(a > 0)).repr);
}
[TestMethod]
public void QuestionByGurelsoycaner()
{
//>>> import numpy as np
//>>> P1 = np.array([1, 2, 3, 4])
//>>> P2 = np.array([4, 3, 2, 1])
//>>> ex = (P2 - P1) / (np.linalg.norm(P2 - P1))
//>>> ex
//array([0.67082039, 0.2236068, -0.2236068, -0.67082039])
var P1 = np.array(new[] { 1, 2, 3, 4 });
var P2 = np.array(new[] { 4, 3, 2, 1 });
var ex = (P2 - P1) / (np.linalg.norm(P2 - P1));
Assert.AreEqual("array([ 0.67082039, 0.2236068 , -0.2236068 , -0.67082039])", ex.repr);
}
[TestMethod]
public void QuestionBySimonBuehler()
{
//import numpy as np
//bboxes = np.empty([999, 4])
//keep_idx = np.array([2, 6, 7, 8, 9, 13])
//bboxes = bboxes[keep_idx]
//>>> bboxes.shape
//(6, 4)
var bboxes = np.empty(new Shape(999, 4));
var keep_idx = np.array(new[] { 2, 6, 7, 8, 9, 13 });
bboxes = bboxes[keep_idx];
Assert.AreEqual("(6, 4)", bboxes.shape.ToString());
//>>> np.where(keep_idx > 4)[0]
//array([1, 2, 3, 4, 5], dtype = int64)
var x = np.where(keep_idx > 4)[0];
Assert.AreEqual("array([1, 2, 3, 4, 5], dtype=int64)", x.repr);
}
[TestMethod]
public void StringArray()
{
//>>> a = numpy.array(['apples', 'foobar', 'cowboy'])
//>>> a[2] = 'bananas'
//>>> a
//array(['apples', 'foobar', 'banana'],
// dtype = '|S6')
var a = np.array(new string[] { "apples", "foobar", "cowboy" });
Assert.AreEqual("array(['apples', 'foobar', 'cowboy'], dtype='<U6')", a.repr);
// todo: a[2]="banana";
a.self.SetItem(new PyInt(2), new PyString("banana"));
Assert.AreEqual("array(['apples', 'foobar', 'banana'], dtype='<U6')", a.repr);
//>>> a = numpy.array(['apples', 'foobar', 'cowboy'], dtype = object)
//>>> a
//array([apples, foobar, cowboy], dtype = object)
//>>> a[2] = 'bananas'
//>>> a
//array([apples, foobar, bananas], dtype = object)
a = np.array(new string[] { "apples", "foobar", "cowboy" }, dtype: np.object_);
Assert.AreEqual("array(['apples', 'foobar', 'cowboy'], dtype=object)", a.repr);
// todo: a[2]="banana";
a.self.SetItem(new PyInt(2), new PyString("banana"));
Assert.AreEqual("array(['apples', 'foobar', 'banana'], dtype=object)", a.repr);
}
[TestMethod]
public void ComplexNumbers()
{
//>>> a = np.array([1+2j, 3+4j, 5+6j])
//>>> a.imag
//array([2., 4., 6.])
var a = np.array(new Complex[] { new Complex(1, 2), new Complex(3, 4), new Complex(5, 6), });
Assert.AreEqual("array([1., 3., 5.])", a.real.repr);
Assert.AreEqual("array([2., 4., 6.])", a.imag.repr);
//>>> np.imag(a)
//array([2., 4., 6.])
//>>> np.real(a)
//array([1., 3., 5.])
Assert.AreEqual("array([1., 3., 5.])", np.real(a).repr);
Assert.AreEqual("array([2., 4., 6.])", np.imag(a).repr);
//>>> a.imag = np.array([8, 10, 12])
//>>> a
//array([1. +8.j, 3.+10.j, 5.+12.j])
a.imag = np.array(new[] { 8, 10, 12 });
Assert.AreEqual("array([1. +8.j, 3.+10.j, 5.+12.j])", a.repr);
//>>> np.imag(1 + 1j)
//1.0
Assert.AreEqual(1.0, np.imag(new Complex(1, 1)).asscalar<double>());
// getting the complex numbers out again
var c = a.GetData<Complex>();
Assert.IsTrue(Enumerable.SequenceEqual(new Complex[] { new Complex(1, 8), new Complex(3, 10), new Complex(5, 12), }, c));
// accessing scalar values
var b = new NDarray<Complex>(a);
Assert.AreEqual(new Complex(1, 8), b[0].asscalar<Complex>());
}
[TestMethod]
public void IssueByXlient()
{
var points = new Point[] { new Point(0, 0), new Point(17, 4), new Point(2, 22), new Point(10, 7), };
int[,] Pts = new int[,] {
{ points[0].X, points[0].Y },
{ points[1].X, points[1].Y },
{ points[2].X, points[2].Y },
{ points[3].X, points[3].Y }
};
// exception here / deadlock
Dtype dtype = Pts.GetDtype();
NDarray pts = np.array(Pts);
NDarray rectangle = np.zeros(new Shape(4, 2), dtype);
NDarray sum = np.sum(pts, 1);
NDarray differnce = np.diff(pts, axis: 1);
rectangle[0] = pts[sum.argmin()];
rectangle[2] = pts[sum.argmax()];
rectangle[1] = pts[differnce.argmin()];
rectangle[3] = pts[differnce.argmax()];
}
[TestMethod]
public void IssueByVolgaone()
{
var n = np.array(new float[,] { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } });
var row0 = n[0]; //extract 1st row
Assert.AreEqual("array([1., 2., 3.], dtype=float32)", row0.repr);
var row0Data = row0.GetData<float>(); //this is correct - {1,2,3}
Assert.AreEqual("1,2,3", string.Join(",", row0Data));
var col1 = n[":,1"]; //extract 1st column - NDarray is [2 5 8] as expected
Assert.AreEqual("array([2., 5., 8.], dtype=float32)", col1.repr);
var col1Data = col1.GetData(); //this is wrong - {2,3,4}
Assert.AreEqual("2,5,8", string.Join(",", col1Data));
}
[TestMethod]
public void IssueByNbustins()
{
int[,,,] iarr = new int[3, 25, 25, 3];
NDarray nd = np.array(iarr);
Assert.AreEqual(new Shape(3, 25, 25, 3), nd.shape);
}
[TestMethod]
public void IssueByBanyc1()
{
//a = np.array([[1, 2, 3], [4, 5, 6]])
//b = np.array([1, 2])
//np.savez('/tmp/123.npz', a = a, b = b)
//data = np.load('/tmp/123.npz')
//data['a']
//array([[1, 2, 3],
//[4, 5, 6]])
//data['b']
//array([1, 2])
//data.close()
var a = np.array(new[,] { { 1, 2, 3 }, { 4, 5, 6 } });
var b = np.array(new[] { 1, 2 });
string tempFile = Path.GetTempFileName() + ".npz";
Console.WriteLine(tempFile);
np.savez(tempFile, kwds: new Dictionary<string, NDarray>() { ["a"] = a, ["b"] = b });
var data = np.load(tempFile, allow_pickle: true);
var a1 = new NDarray(data.self["a"]);
Console.WriteLine(a1.repr);
var b1 = new NDarray(data.self["b"]);
Console.WriteLine(b1.repr);
Assert.AreEqual("array([[1, 2, 3],\n [4, 5, 6]])", a1.repr);
Assert.AreEqual(@"array([1, 2])", b1.repr);
}
[TestMethod]
public void IssueByBanyc2()
{
var a = np.array(new[,] { { 1, 2, 3 }, { 4, 5, 6 } });
var b = np.array(new[] { 1, 2 });
string tempFile = Path.GetTempFileName() + ".npz";
Console.WriteLine(tempFile);
np.savez(tempFile, new[] { a, b });
var data = np.load(tempFile, allow_pickle: true);
var a1 = new NDarray(data.self["arr_0"]);
Console.WriteLine(a1.repr);
var b1 = new NDarray(data.self["arr_1"]);
Console.WriteLine(b1.repr);
Assert.AreEqual("array([[1, 2, 3],\n [4, 5, 6]])", a1.repr);
Assert.AreEqual(@"array([1, 2])", b1.repr);
}
[TestMethod]
public void IssueByBanyc3()
{
//>>> a = np.ones((1, 2, 3, 4))
//>>> a
//array([[[[1., 1., 1., 1.],
// [1., 1., 1., 1.],
// [1., 1., 1., 1.]],
// [[1., 1., 1., 1.],
// [1., 1., 1., 1.],
// [1., 1., 1., 1.]]]])
//>>> c = np.transpose(a, (0, 2, 3, 1))
//>>> c
//array([[[[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]],
// [[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]],
// [[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]]]])
//>>> b = a.transpose((0, 2, 3, 1))
//>>> b
//array([[[[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]],
// [[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]],
// [[1., 1.],
// [1., 1.],
// [1., 1.],
// [1., 1.]]]])
//>>>
NDarray a = np.ones(1, 2, 3, 4);
NDarray c = np.transpose(a, new int[] { 0, 2, 3, 1 });
string s = "array([[[[1., 1.],\n [1., 1.],\n [1., 1.],\n [1., 1.]],\n\n [[1., 1.],\n [1., 1.],\n [1., 1.],\n [1., 1.]],\n\n [[1., 1.],\n [1., 1.],\n [1., 1.],\n [1., 1.]]]])";
Assert.AreEqual(s, c.repr);
NDarray b = a.transpose(0, 2, 3, 1);
Assert.AreEqual(s, b.repr);
}
[TestMethod]
public void IssueBybeanels01()
{
//sample = [np.array([[1., 2., 3.]]),np.array([[4., 5., 6.]]),np.array([[7., 8., 9.]])]
//for test in sample:
// n = np.argmax(test[0])
// print(n)
//# expected:
//# 2
//# 2
//# 2
var result = new List<int>();
var nc = np.array(new[] { np.array(new[] { 1, 2, 3 }), np.array(new[] { 4, 5, 6 }), np.array(new[] { 7, 8, 9 }) });
for (int i = 0; i < nc.len; i++) {
var n = np.argmax(nc[i]).asscalar<int>();
result.Add(n);
}
Assert.AreEqual("2, 2, 2", string.Join(", ", result));
}
[TestMethod]
public void IssueBybeanels01a()
{
//sample = [np.array([[1., 2., 3.]]),np.array([[4., 5., 6.]]),np.array([[7., 8., 9.]])]
//for test in sample:
// n = np.argmax(test[0])
// print(n)
//# expected:
//# 2
//# 2
//# 2
var result = new List<int>();
var nc = np.array(new[] { np.array(new[] { 1, 2, 3 }), np.array(new[] { 4, 5, 6 }), np.array(new[] { 7, 8, 9 }) });
for (int i = 0; i < nc.len; i++) {
var n = np.argmax(nc[i]).asscalar<int>();
result.Add(n);
}
Assert.AreEqual("2, 2, 2", string.Join(", ", result));
}
[TestMethod]
public void IssueByMatteo_0()
{
//>>> x = np.array([0, 1, 2, 3])
//>>> y = np.array([-1, 0.2, 0.9, 2.1])
//>>> A = np.vstack([x, np.ones(len(x))]).T
//>>> A
//array([[0., 1.],
// [1., 1.],
// [2., 1.],
// [3., 1.]])
//>>> np.linalg.lstsq(A, y, rcond = None)
//(array([1. , -0.95]), array([0.05]), 2, array([4.10003045, 1.09075677]))
var x = np.array(new[] { 0, 1, 2, 3 });
var y = np.array(new[] { -1, 0.2, 0.9, 2.1 });
var A = np.vstack(x, np.ones(x.len)).T;
Assert.AreEqual("array([[0., 1.],\n [1., 1.],\n [2., 1.],\n [3., 1.]])", A.repr);
var tuple = np.linalg.lstsq(A, y, null);
Assert.AreEqual("array([ 1. , -0.95])", tuple.Item1.repr);
Assert.AreEqual("array([0.05])", tuple.Item2.repr);
Assert.AreEqual(2, tuple.Item3);
Assert.AreEqual("array([4.10003045, 1.09075677])", tuple.Item4.repr);
}
[TestMethod]
public void IssueByDecemberDream()
{
//a = np.array([1, 2, -2, -4, 0])
//np.roots(a)
//# returns array([ 1.41421356, -2., -1.41421356, 0.])
var a = np.array(new[] { 1, 2, -2, -4, 0 });
var b = np.roots(a);
Assert.AreEqual("array([ 1.41421356, -2. , -1.41421356, 0. ])", b.repr);
}
[TestMethod]
public void IssueByDecemberDream2()
{
NDarray test = np.array(new int[,] { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } });
NDarray rows = np.array(new int[,] { { 0, 0 }, { 3, 3 } });
NDarray cols = np.array(new int[,] { { 0, 2 }, { 0, 2 } });
var b = test[rows, cols];
// should return
// [[0, 2],
// [9, 11]]
Assert.AreEqual("array([[ 0, 2],\n [ 9, 11]])", b.repr);
}
[TestMethod]
public void IssueByAmpangboy()
{
var arr = np.array(1.0);
var result = np.insert(arr, 0, 1.0);
Assert.AreEqual("array([1., 1.])", result.repr);
}
[TestMethod]
public void IssueByBigpo()
{
var a = np.random.randn(3, 3);
var tmp = np.linalg.qr(a);
}
[TestMethod]
public void IssueByAllenP()
{
//>>> dx = 4.0
//>>> dy = 5.0
//>>> zX =[[1, 2, 3],[4,5,6],[8,9,0]]
//>>> np.gradient(zX, dx, dy)
//[array([[0.75, 0.75, 0.75],
// [0.875, 0.875, -0.375],
// [1. , 1. , -1.5]]), array([[0.2, 0.2, 0.2],
// [ 0.2, 0.2, 0.2],
// [ 0.2, -0.8, -1.8]])]
var zX = new NDarray(new[,] { { 1, 2, 3 }, { 4, 5, 6 }, { 8, 9, 0 } });
var result = np.gradient(zX, new List<double> { 4.0, 5.0 });
var expected = @"[array([[ 0.75 , 0.75 , 0.75 ],
[ 0.875, 0.875, -0.375],
[ 1. , 1. , -1.5 ]]), array([[ 0.2, 0.2, 0.2],
[ 0.2, 0.2, 0.2],
[ 0.2, -0.8, -1.8]])]".Replace("\r", "");
Assert.AreEqual(expected, result.repr);
}
[TestMethod]
public void PrimitiveConversion()
{
dynamic np = Numpy.np.dynamic_self;
Assert.AreEqual(3, (new PyInt(3)).As<int>());
Assert.AreEqual(1_000_000_000_000_000, new PyInt(1_000_000_000_000_000).As<long>());
Console.WriteLine(((dynamic)new PyInt(1_000_000_000_000_000)).__class__); // => <class 'int'>
Console.WriteLine(np.int64(1_000_000_000_000_000).__class__); // => <class 'numpy.int64'>
Assert.AreEqual(3, (np.int32(3).item() as PyObject).As<int>());
Assert.AreEqual(1_000_000_000_000_000, (np.int64(1_000_000_000_000_000).item() as PyObject).As<long>());
}
[TestMethod]
public void IssueByMegawattFs()
{
var arr = np.array(new int[] { 1, 2, 3, 4, 5 });
var slice0 = new Slice(2, 4);
var arr4 = arr[slice0];
Assert.AreEqual("array([3, 4])", arr4.repr);
var slice1 = new Slice(2, -1);
var arr5 = arr[slice1];
Assert.AreEqual("array([3, 4])", arr5.repr);
var arr1 = arr["2:4"];
Assert.AreEqual("array([3, 4])", arr1.repr);
var arr2 = arr[":4"];
Assert.AreEqual("array([1, 2, 3, 4])", arr2.repr);
var arr3 = arr[":-1"];
Assert.AreEqual("array([1, 2, 3, 4])", arr3.repr);
}
[TestMethod]
public async Task IssueByMrCOrrupted()
{
Dictionary<string, NDarray> arrays = new Dictionary<string, NDarray>();
arrays["a"] = np.arange(6).reshape(2, 3);
arrays["b"] = np.arange(3);
var filename = Path.Combine(Path.GetTempPath(), "test.npz");
np.savez_compressed(filename, null, arrays);
var archive = np.load(filename);
Console.WriteLine(archive.repr);
var a = new NDarray(archive.PyObject["a"]);
var b = new NDarray(archive.PyObject["b"]);
Console.WriteLine(a.repr);
Console.WriteLine(b.repr);
Assert.AreEqual("array([[0, 1, 2],\n [3, 4, 5]])", a.repr);
Assert.AreEqual(@"array([0, 1, 2])", b.repr);
}
[TestMethod]
public async Task AsscalarRemovedInNumpyV1_23()
{
Assert.AreEqual(143, new NDarray<int>(new int[] { 143 }).asscalar<int>());
Assert.AreEqual(143d, new NDarray<double>(new[] { 143d }).asscalar<double>());
Assert.AreEqual(143d, new NDarray<double>(new[] { 143d }).item());
}
[TestMethod]
public async Task IssueByMaLichtenegger()
{
// byte array als uint32 array
var bytes = new byte[] { 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0 };
var uints = np.zeros(new Shape(3), np.uint32);
Console.WriteLine(uints.repr);
var ctypes = uints.PyObject.ctypes;
long ptr = ctypes.data;
Marshal.Copy(bytes, 0, new IntPtr(ptr), bytes.Length);
Console.WriteLine(uints.repr);
Assert.AreEqual("array([1, 2, 3], dtype=uint32)", uints.repr);
// byte array als float64 array
bytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0 };
var doubles = np.zeros(new Shape(2), np.float64);
Console.WriteLine(doubles.repr);
ctypes = doubles.PyObject.ctypes;
ptr = ctypes.data;
Marshal.Copy(bytes, 0, new IntPtr(ptr), bytes.Length);
Console.WriteLine(doubles.repr);
Assert.IsTrue(doubles[0].asscalar<double>() != 0);
Assert.IsTrue(doubles[1].asscalar<double>() == 0);
}
[TestMethod]
public async Task IssueByMartinDevans()
{
//>>> x = np.arange(9)
//>>> np.split(x, 3)
//[array([0, 1, 2]), array([3, 4, 5]), array([6, 7, 8])]
var x = np.arange(9);
var b = np.split(x, 3).repr();