/// <summary>
/// Create a ndarray of a certain buffer and shape.
/// </summary>
/// <param name="buffer">The buffer to back this ndarray.</param>
/// <param name="shape">The shape.</param>
public ADNDArray(IDataBuffer <T> buffer, long[] shape)
{
if (buffer.Length < ArrayUtils.Product(shape))
{
throw new ArgumentException($"Buffer must contain the entire shape, but buffer length was {buffer.Length} and total shape length {ArrayUtils.Product(shape)} (shape = {ArrayUtils.ToString(shape)}).");
}
Initialise(NDArrayUtils.CheckShape(shape), NDArrayUtils.GetStrides(shape));
Data = buffer;
}
/// <summary>
/// Create an ndarray of a certain array (array will be COPIED into a data buffer) and shape.
/// Total shape length must be smaller or equal than the data array length.
/// </summary>
/// <param name="data">The data to use to fill this ndarray.</param>
/// <param name="shape">The shape.</param>
public ADNDArray(T[] data, params long[] shape)
{
if (data.Length < ArrayUtils.Product(shape))
{
throw new ArgumentException($"Data must contain the entire shape, but data length was {data.Length} and total shape length {ArrayUtils.Product(shape)} (shape = {ArrayUtils.ToString(shape)}).");
}
Initialise(NDArrayUtils.CheckShape(shape), NDArrayUtils.GetStrides(shape));
Data = new DataBuffer <T>(data, 0L, Length);
}
/// <inheritdoc />
public virtual INDArray ReshapeSelf(params long[] newShape)
{
if (Length != ArrayUtils.Product(newShape))
{
throw new ArgumentException($"Reshaping cannot change total ndarray length ({Length}), only array shape" +
$" (attempted change from [{string.Join(", ", Shape)}] to [{string.Join(", ", newShape)}]).");
}
Reinitialise(NDArrayUtils.CheckShape(newShape), NDArrayUtils.GetStrides(newShape));
return(this);
}
public static LayerConstruct Construct(string name, string inputAlias, params long[] shape)
{
NDArrayUtils.CheckShape(shape);
LayerConstruct construct = new LayerConstruct(name, typeof(InputLayer));
construct.ExternalInputs = new[] { inputAlias };
construct.Parameters["external_input_alias"] = inputAlias;
construct.Parameters["shape"] = shape;
construct.Parameters["size"] = (int)ArrayUtils.Product(shape);
return(construct);
}
public CudaFloat32NDArray(CudaSigmaDiffDataBuffer <float> buffer, long[] shape) : this(new DNDArray(buffer, NDArrayUtils.CheckShape(shape)))
{
}
public ADNDFloat32Array(long backendTag, IDataBuffer <float> buffer, long[] shape) : this(new DNDArray(new SigmaDiffDataBuffer <float>(buffer, 0, buffer.Length, backendTag), NDArrayUtils.CheckShape(shape)))
{
}
public ADNDFloat32Array(long backendTag, float[] data, params long[] shape) : this(new DNDArray(new SigmaDiffDataBuffer <float>(data, backendTag), NDArrayUtils.CheckShape(shape)))
{
}
public ADFloat32NDArray(long backendTag, params long[] shape) : this(new DNDArray(new SigmaDiffDataBuffer <float>(ArrayUtils.Product(shape), backendTag), NDArrayUtils.CheckShape(shape)))
{
}
/// <summary>
/// Create an ndarray of a certain shape (initialised with zeros).
/// </summary>
/// <param name="shape">The shape.</param>
public ADNDArray(params long[] shape)
{
Initialise(NDArrayUtils.CheckShape(shape), NDArrayUtils.GetStrides(shape));
Data = new DataBuffer <T>(Length);
}
