public NdArray(int[] shape, int batchCount, IFunction <T> parentFunc = null)
{
this.Shape = shape.ToArray();
this.Length = NdArray.ShapeToLength(this.Shape);
this.BatchCount = batchCount;
this.Data = new T[this.Length * batchCount];
this.ParentFunc = parentFunc;
}
//全データを読み込む
public TestDataSet <T> GetAllDataSet()
{
int batchCount = Data.Length;
T[] data = new T[NdArray.ShapeToLength(Shape) * Data.Length];
for (int i = 0; i < batchCount; i++)
{
T[] labeledData = Get(i);
Array.Copy(labeledData, 0, data, i * labeledData.Length, labeledData.Length);
}
TestDataSet <T> result = new TestDataSet <T>(NdArray.Convert(data, Shape, batchCount), NdArray.Convert(DataLabel, new[] { 1 }, batchCount));
return(result);
}
public void Reshape(params int[] shape)
{
int val = 0;
int dimension = Length;
//-1指定を算出
if (shape.Contains(-1))
{
int minusIndex = -1;
for (int i = 0; i < shape.Length; i++)
{
if (shape[i] != -1)
{
val += Length % shape[i];
if (val == 0)
{
dimension /= shape[i];
}
else
{
throw new Exception("要素の指定が間違っています");
}
}
else
{
if (minusIndex != -1)
{
throw new Exception("-1が二つ以上指定されています");
}
minusIndex = i;
}
}
shape[minusIndex] = dimension;
}
#if DEBUG
else if (Length != NdArray.ShapeToLength(shape))
{
throw new Exception("指定されたShapeのサイズが現在のData.Lengthと等しくありません");
}
#endif
Shape = shape.ToArray();
}
private TestDataSet <T> GetRandomData(int batchCount, Func <int> getIndexFunc)
{
T[] data = new T[NdArray.ShapeToLength(Shape) * batchCount];
int[] label = new int[batchCount];
for (int i = 0; i < batchCount; i++)
{
int index = getIndexFunc();
T[] labeledData = Get(index);
Array.Copy(labeledData, 0, data, i * labeledData.Length, labeledData.Length);
label[i] = DataLabel[index];
}
TestDataSet <T> result = new TestDataSet <T>(NdArray.Convert(data, Shape, batchCount), NdArray.Convert(label, new[] { 1 }, batchCount));
return(result);
}
public NdArray(Array array, bool asBatch = false, IFunction <T> parentFunc = null)
{
this.Data = array.FlattenEx <T>();
//1次元目をバッチとして扱うか？
if (asBatch)
{
this.BatchCount = array.Rank > 1 ? array.GetLength(0) : array.Length;
int[] resultShape = array.Rank > 1 ? new int[array.Rank - 1] : new[] { 1 };
if (array.Rank > 1)
{
for (int i = 0; i < resultShape.Length; i++)
{
resultShape[i] = array.GetLength(i + 1);
}
}
this.Shape = resultShape;
this.Length = NdArray.ShapeToLength(this.Shape);
}
else
{
int[] resultShape = new int[array.Rank];
for (int i = 0; i < array.Rank; i++)
{
resultShape[i] = array.GetLength(i);
}
this.Shape = resultShape;
this.Length = Data.Length;
}
this.ParentFunc = parentFunc;
}
//範囲指定の配列を作る
public static Array Range(int[] shape, int start = 0)
{
return(Enumerable.Range(start, NdArray.ShapeToLength(shape)).ToNdArray(shape));
}
public NdArray(params int[] shape)
{
this.Data = new T[NdArray.ShapeToLength(shape)];
this.Shape = shape.ToArray();
this.Length = Data.Length;
}
