/// <summary>
/// Create batch data as a Value object from a dense source buffer.
/// Batch data of the specified dataSize are copied from the source buffer
/// starting at the specified starting position
/// </summary>
/// <typeparam name="T">float or double</typeparam>
/// <param name="sampleShape">shape of the Value</param>
/// <param name="dataBuffer">source data buffer</param>
/// <param name="dataStart">index to the source data buffer where batch data start</param>
/// <param name="dataSize">size of the data</param>
/// <param name="device">device where data are allocated</param>
/// <param name="readOnly">whether data are mutable</param>
/// <returns>the batch data value</returns>
public static Value CreateBatch <T>(NDShape sampleShape, T[] dataBuffer, int dataStart, int dataSize,
DeviceDescriptor device, bool readOnly = false)
{
if (typeof(T).Equals(typeof(float)))
{
return(Value._CreateBatchFloat(sampleShape, dataBuffer as float[], dataStart, dataSize, device, readOnly));
}
else if (typeof(T).Equals(typeof(double)))
{
return(Value._CreateBatchDouble(sampleShape, dataBuffer as double[], dataStart, dataSize, device, readOnly));
}
else
{
throw new ArgumentException("The data type " + typeof(T).ToString() + " is not supported. Only float or double is supported by CNTK.");
}
}
/// <summary>
/// Create Value object from OneHotVector input as batch data, for 1D tensor only.
/// </summary>
/// <typeparam name="T">data type</typeparam>
/// <param name="dimension">data dimension</param>
/// <param name="batch">data batches</param>
/// <param name="device">device</param>
/// <param name="readOnly">whether it a readonly value</param>
/// <returns></returns>
public static Value CreateBatch <T>(int dimension, IEnumerable <int> batch, DeviceDescriptor device, bool readOnly = false)
{
var inputVector = Helper.AsSizeTVector(batch);
if (typeof(T).Equals(typeof(float)))
{
return(Value._CreateBatchFloat((uint)dimension, inputVector, device, readOnly));
}
else if (typeof(T).Equals(typeof(double)))
{
return(Value._CreateBatchDouble((uint)dimension, inputVector, device, readOnly));
}
else
{
throw new ArgumentException("The data type " + typeof(T).ToString() + " is not supported. Only float or double is supported by CNTK.");
}
}
/// <summary>
/// Create Value object from dense input as batch data.
/// </summary>
/// <typeparam name="T">float or double</typeparam>
/// <param name="sampleShape">shape of the Value</param>
/// <param name="batch">batch of data</param>
/// <param name="device">device</param>
/// <param name="readOnly">readonly value</param>
/// <returns>the value</returns>
public static Value CreateBatch <T>(NDShape sampleShape, IEnumerable <T> batch, DeviceDescriptor device, bool readOnly = false)
{
if (typeof(T).Equals(typeof(float)))
{
var inputVector = Helper.AsFloatVector(batch);
return(Value._CreateBatchFloat(sampleShape, inputVector, device, readOnly));
}
else if (typeof(T).Equals(typeof(double)))
{
var inputVector = Helper.AsDoubleVector(batch);
return(Value._CreateBatchDouble(sampleShape, inputVector, device, readOnly));
}
else
{
throw new ArgumentException("The data type " + typeof(T).ToString() + " is not supported. Only float or double is supported by CNTK.");
}
}