public void NestedView_2D()
{
var data = new TypedArrayStorage(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
data.Reshape(2, 10);
//>>> x = np.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
//>>> x = x.reshape(2, 10)
//>>> x
//array([[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
// [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]])
// return identical view
var identical = new ViewStorage(data, ":");
Assert.AreEqual(new Shape(2, 10), identical.Shape);
//>>> x[:, 1:9]
//array([[1, 2, 3, 4, 5, 6, 7, 8],
// [1, 2, 3, 4, 5, 6, 7, 8]])
var view1 = new ViewStorage(identical, ":,1:9");
Assert.AreEqual(new Shape(2, 8), view1.Shape);
AssertAreEqual(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8 }, view1.GetData());
//>>> x[:, 1:9][:,::- 2]
//array([[8, 6, 4, 2],
// [8, 6, 4, 2]])
var view2 = new ViewStorage(view1, ":,::-2");
Assert.AreEqual(new Shape(2, 4), view2.Shape);
AssertAreEqual(new int[] { 8, 6, 4, 2, 8, 6, 4, 2 }, view2.GetData());
//>>> x[:, 1:9][:,::- 2][:,::- 3]
//array([[2, 8],
// [2, 8]])
var view3 = new ViewStorage(view2, ":,::-3");
Assert.AreEqual(new Shape(2, 2), view3.Shape);
AssertAreEqual(new int[] { 2, 8, 2, 8 }, view3.GetData());
// all must see the same modifications, no matter if original or any view is modified
// modify original
data.ReplaceData(new int[] { 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, 0, -1, -2, -3, -4, -5, -6, -7, -8, -9 });
AssertAreEqual(new int[] { -1, -2, -3, -4, -5, -6, -7, -8, -1, -2, -3, -4, -5, -6, -7, -8 }, view1.GetData());
AssertAreEqual(new int[] { -8, -6, -4, -2, -8, -6, -4, -2 }, view2.GetData());
AssertAreEqual(new int[] { -2, -8, -2, -8 }, view3.GetData());
// modify views
view1.SetData(88, 0, 7);
view1.SetData(888, 1, 7);
AssertAreEqual(new int[] { 0, -1, -2, -3, -4, -5, -6, -7, 88, -9, 0, -1, -2, -3, -4, -5, -6, -7, 888, -9 },
data.GetData());
AssertAreEqual(new int[] { -1, -2, -3, -4, -5, -6, -7, 88, -1, -2, -3, -4, -5, -6, -7, 888 },
view1.GetData());
AssertAreEqual(new int[] { 88, -6, -4, -2, 888, -6, -4, -2 }, view2.GetData());
AssertAreEqual(new int[] { -2, 88, -2, 888 }, view3.GetData());
view3.SetData(22, 0, 0);
view3.SetData(222, 1, 0);
AssertAreEqual(new int[] { 0, -1, 22, -3, -4, -5, -6, -7, 88, -9, 0, -1, 222, -3, -4, -5, -6, -7, 888, -9 },
data.GetData());
AssertAreEqual(new int[] { -1, 22, -3, -4, -5, -6, -7, 88, -1, 222, -3, -4, -5, -6, -7, 888 },
view1.GetData());
AssertAreEqual(new int[] { 88, -6, -4, 22, 888, -6, -4, 222 }, view2.GetData());
AssertAreEqual(new int[] { 22, 88, 222, 888 }, view3.GetData());
}
public void CheckChangeTensorLayout2D()
{
var strg2DCpy = (TypedArrayStorage)strg2D.Clone();
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.Shape.Dimensions, new int[] { 3, 3 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.GetData <long>(), new long[] { 0, 3, 6, 1, 4, 7, 2, 5, 8 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.Shape.Dimensions, new int[] { 3, 3 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.GetData <long>(), strg2D.GetData <long>()));
strg2DCpy = (TypedArrayStorage)strg2DNonFull.Clone();
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.Shape.Dimensions, new int[] { 5, 2 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.GetData <long>(), new long[] { 0, 5, 1, 6, 2, 7, 3, 8, 4, 9 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.Shape.Dimensions, new int[] { 5, 2 }));
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.GetData <long>(), strg2DNonFull.GetData <long>()));
strg2DCpy = new TypedArrayStorage(typeof(long));
strg2DCpy.Allocate(new Shape(5, 2));
strg2DCpy.ReplaceData(strg2DNonFull.GetData());
Assert.IsTrue(Enumerable.SequenceEqual(strg2DCpy.GetData <long>(), new long[] { 0, 2, 4, 6, 8, 1, 3, 5, 7, 9 }));
}
public void GetData_1D()
{
var data = new TypedArrayStorage(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
Assert.AreEqual(new Shape(10), data.Shape);
// return identical view
var view = new ViewStorage(data, ":");
Assert.AreEqual(new Shape(10), view.Shape);
AssertAreEqual(data.GetData(), view.GetData());
view = new ViewStorage(data, "-77:77");
Assert.AreEqual(new Shape(10), view.Shape);
AssertAreEqual(data.GetData(), view.GetData());
// return reduced view
view = new ViewStorage(data, "7:");
Assert.AreEqual(new Shape(3), view.Shape);
AssertAreEqual(new int[] { 7, 8, 9 }, view.GetData());
view = new ViewStorage(data, ":5");
Assert.AreEqual(new Shape(5), view.Shape);
AssertAreEqual(new int[] { 0, 1, 2, 3, 4 }, view.GetData());
view = new ViewStorage(data, "2:3");
Assert.AreEqual(new Shape(1), view.Shape);
AssertAreEqual(new int[] { 2 }, view.GetData());
// return stepped view
view = new ViewStorage(data, "::2");
Assert.AreEqual(new Shape(5), view.Shape);
AssertAreEqual(new int[] { 0, 2, 4, 6, 8 }, view.GetData());
view = new ViewStorage(data, "::3");
Assert.AreEqual(new Shape(4), view.Shape);
AssertAreEqual(new int[] { 0, 3, 6, 9 }, view.GetData());
view = new ViewStorage(data, "-77:77:77");
Assert.AreEqual(new Shape(1), view.Shape);
AssertAreEqual(new[] { 0 }, view.GetData());
// negative step!
view = new ViewStorage(data, "::-1");
Assert.AreEqual(new Shape(10), view.Shape);
AssertAreEqual(data.GetData().OfType <int>().Reverse().ToArray(), view.GetData());
view = new ViewStorage(data, "::-2");
Assert.AreEqual(new Shape(5), view.Shape);
AssertAreEqual(new int[] { 9, 7, 5, 3, 1 }, view.GetData());
view = new ViewStorage(data, "::-3");
Assert.AreEqual(new Shape(4), view.Shape);
AssertAreEqual(new int[] { 9, 6, 3, 0 }, view.GetData());
view = new ViewStorage(data, "-77:77:-77");
Assert.AreEqual(new Shape(1), view.Shape);
AssertAreEqual(new[] { 9 }, view.GetData());
}
public void NestedView_1D()
{
var data = new TypedArrayStorage(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
// return identical view
var identical = new ViewStorage(data, ":");
Assert.AreEqual(new Shape(10), identical.Shape);
var view1 = new ViewStorage(identical, "1:9");
Assert.AreEqual(new Shape(8), view1.Shape);
AssertAreEqual(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, }, view1.GetData());
var view2 = new ViewStorage(view1, "::-2");
Assert.AreEqual(new Shape(4), view2.Shape);
AssertAreEqual(new int[] { 8, 6, 4, 2, }, view2.GetData());
var view3 = new ViewStorage(view2, "::-3");
Assert.AreEqual(new Shape(2), view3.Shape);
AssertAreEqual(new int[] { 2, 8 }, view3.GetData());
// all must see the same modifications, no matter if original or any view is modified
// modify original
data.ReplaceData(new int[] { 0, -1, -2, -3, -4, -5, -6, -7, -8, -9 });
AssertAreEqual(new int[] { -1, -2, -3, -4, -5, -6, -7, -8, }, view1.GetData());
AssertAreEqual(new int[] { -8, -6, -4, -2, }, view2.GetData());
AssertAreEqual(new int[] { -2, -8 }, view3.GetData());
// modify views
view1.SetData(88, 7);
AssertAreEqual(new int[] { 0, -1, -2, -3, -4, -5, -6, -7, 88, -9 }, data.GetData());
AssertAreEqual(new int[] { -1, -2, -3, -4, -5, -6, -7, 88, }, view1.GetData());
AssertAreEqual(new int[] { 88, -6, -4, -2, }, view2.GetData());
AssertAreEqual(new int[] { -2, 88 }, view3.GetData());
view3.SetData(22, 0);
AssertAreEqual(new int[] { 0, -1, 22, -3, -4, -5, -6, -7, 88, -9 }, data.GetData());
AssertAreEqual(new int[] { -1, 22, -3, -4, -5, -6, -7, 88, }, view1.GetData());
AssertAreEqual(new int[] { 88, -6, -4, 22, }, view2.GetData());
AssertAreEqual(new int[] { 22, 88 }, view3.GetData());
}
public void GetData_2D()
{
//>>> x = np.arange(9).reshape(3, 3)
//>>> x
//array([[0, 1, 2],
// [3, 4, 5],
// [6, 7, 8]])
//>>> x[:]
//array([[0, 1, 2],
// [3, 4, 5],
// [6, 7, 8]])
//>>> x[1:]
//array([[3, 4, 5],
// [6, 7, 8]])
//>>> x[1:,:]
//array([[3, 4, 5],
// [6, 7, 8]])
//>>> x[:, 1:]
//array([[1, 2],
// [4, 5],
// [7, 8]])
//>>> x[1:2, 0:1]
//array([[3]])
var data = new TypedArrayStorage(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8 });
data.Reshape(3, 3);
Assert.AreEqual(new Shape(3, 3), data.Shape);
// return identical view
var view = new ViewStorage(data, ":");
Assert.AreEqual(new Shape(3, 3), view.Shape);
AssertAreEqual(data.GetData(), view.GetData());
// return reduced view
view = new ViewStorage(data, "1:");
Assert.AreEqual(new Shape(2, 3), view.Shape);
AssertAreEqual(new int[] { 3, 4, 5, 6, 7, 8 }, view.GetData());
view = new ViewStorage(data, "1:,:");
Assert.AreEqual(new Shape(2, 3), view.Shape);
AssertAreEqual(new int[] { 3, 4, 5, 6, 7, 8 }, view.GetData());
view = new ViewStorage(data, ":,1:");
Assert.AreEqual(new Shape(3, 2), view.Shape);
AssertAreEqual(new int[] { 1, 2, 4, 5, 7, 8 }, view.GetData());
view = new ViewStorage(data, "1:2, 0:1");
Assert.AreEqual(new Shape(1, 1), view.Shape);
AssertAreEqual(new int[] { 3 }, view.GetData());
// return stepped view
//>>> x
//array([[0, 1, 2],
// [3, 4, 5],
// [6, 7, 8]])
//>>> x[::2]
//array([[0, 1, 2],
// [6, 7, 8]])
//>>> x[::3]
//array([[0, 1, 2]])
//>>> x[::- 1]
//array([[6, 7, 8],
// [3, 4, 5],
// [0, 1, 2]])
//>>> x[::- 2]
//array([[6, 7, 8],
// [0, 1, 2]])
//>>> x[::- 3]
//array([[6, 7, 8]])
view = new ViewStorage(data, "::2");
Assert.AreEqual(new Shape(2, 3), view.Shape);
AssertAreEqual(new int[] { 0, 1, 2, 6, 7, 8 }, view.GetData());
view = new ViewStorage(data, "::3");
Assert.AreEqual(new Shape(1, 3), view.Shape);
AssertAreEqual(new int[] { 0, 1, 2 }, view.GetData());
view = new ViewStorage(data, "::-1");
Assert.AreEqual(new Shape(3, 3), view.Shape);
AssertAreEqual(new int[] { 6, 7, 8, 3, 4, 5, 0, 1, 2, }, view.GetData());
view = new ViewStorage(data, "::-2");
Assert.AreEqual(new Shape(2, 3), view.Shape);
AssertAreEqual(new int[] { 6, 7, 8, 0, 1, 2, }, view.GetData());
view = new ViewStorage(data, "::-3");
Assert.AreEqual(new Shape(1, 3), view.Shape);
AssertAreEqual(new int[] { 6, 7, 8, }, view.GetData());
// N-Dim Stepping
//>>> x[::2,::2]
//array([[0, 2],
// [6, 8]])
//>>> x[::- 1,::- 2]
//array([[8, 6],
// [5, 3],
// [2, 0]])
view = new ViewStorage(data, "::2, ::2");
Assert.AreEqual(new Shape(2, 2), view.Shape);
AssertAreEqual(new int[] { 0, 2, 6, 8 }, view.GetData());
view = new ViewStorage(data, "::-1, ::-2");
Assert.AreEqual(new Shape(3, 2), view.Shape);
AssertAreEqual(new int[] { 8, 6, 5, 3, 2, 0 }, view.GetData());
}
public void InternalArrayCheck()
{
Assert.IsTrue(strg1D.GetData().Length == 10);
Assert.IsTrue(strg2D.GetData().Length == 9);
Assert.IsTrue(strg2DNonFull.GetData().Length == 10);
}