/// <summary>
/// Creates a new NdArray filled with the integers from zero to the specified maximum.
/// </summary>
/// <param name="device">The device to create the NdArray on.</param>
/// <param name="numElements">The number of elements of the new NdArray.</param>
/// <returns>The new NdArray.</returns>
public static NdArray <T> Counting(IDevice device, int numElements)
{
var newArray = new NdArray <T>(new[] { numElements }, device);
newArray.FillIncrementing(Primitives.Zero <T>(), Primitives.One <T>());
return(newArray);
}
/// <summary>
/// Creates a new NdArray filled with equaly spaced values using a specifed increment.
/// </summary>
/// <param name="device">The device to create the NdArray on.</param>
/// <param name="start">The starting value.</param>
/// <param name="stop">The end value, which is not included.</param>
/// <param name="step">The increment between successive element.</param>
/// <typeparam name="T">The new NdArray.</typeparam>
public static NdArray <T> Arange(IDevice device, T start, T stop, T step)
{
var op = ScalarPrimitivesRegistry.For <T, T>();
var opc = ScalarPrimitivesRegistry.For <int, T>();
var numberOfElementT = op.Divide(op.Subtract(stop, start), step);
var numberOfElementInt = opc.Convert(numberOfElementT);
var numberOfElement = Math.Max(0, numberOfElementInt);
var shape = new[] { numberOfElement };
var newArray = new NdArray <T>(shape, device);
newArray.FillIncrementing(start, step);
return(newArray);
}
/// <summary>
/// Creates a new NdArray of given size filled with equaly spaced values.
/// </summary>
/// <param name="device">The device to create the NdArray on.</param>
/// <param name="start">The starting value.</param>
/// <param name="stop">The end value, which is not included.</param>
/// <param name="numElement">The size of the vector.</param>
/// <returns>The new NdArray.</returns>
public static NdArray <T> Linspace(IDevice device, T start, T stop, int numElement)
{
if (numElement < 2)
{
throw new ArgumentException("Linspace requires at least two elements.", "numElement");
}
var op = ScalarPrimitivesRegistry.For <T, int>();
var numElementT = op.Convert(numElement - 1);
var increment = op.Divide(op.Subtract(stop, start), numElementT);
var newArray = new NdArray <T>(new[] { numElement }, device);
newArray.FillIncrementing(start, increment);
return(newArray);
}
