/// <summary>
///
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="operation"></param>
/// <returns></returns>
public static float[][] ElementWiseOperation(float[][] a, float[][] b, ElementWiseOperation operation)
{
if (!MatrixCompare.SameSize(a, b))
{
throw new ArgumentException("Matrices are not of same size.");
}
float[][] y = CreateMatrix(Rows(a), Columns(b));
for (int i = 0; i < Rows(y); i++)
{
y[i] = VectorMath.ElementWiseOperation(a[i], b[i], operation);
}
return(y);
}
/// <summary>
/// Element-wise subtraction.
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns></returns>
public static float[][] Subtract(float[][] a, float[][] b)
{
if (!MatrixCompare.SameSize(a, b))
{
throw new ArgumentException("Matrices are not of same size.");
}
float[][] y = CreateMatrix(Rows(a), Columns(a));
for (int i = 0; i < Rows(y); i++)
{
y[i] = VectorMath.Subtract(Row(a, i), Row(b, i));
}
return(y);
}
/// <summary>
/// Multiply two matrices.
/// </summary>
/// <param name="a">matrix a</param>
/// <param name="b">matrix b</param>
/// <returns>a new matrix which is the result of the multiplication</returns>
public static float[][] Multiply(float[][] a, float[][] b)
{
float[][] y = CreateMatrix(Rows(a), Columns(b));
float[][] bt = Transpose(b);
if (!MatrixCompare.CompareColumnsWithRows(a, b))
{
throw new ArgumentException("Illegal matrix dimensions.");
}
for (int r = 0; r < Rows(a); r++)
{
for (int c = 0; c < Columns(b); c++)
{
float[] ra = Row(a, r);
float[] rb = Row(bt, c);
y[r][c] = VectorMath.Dot(ra, rb);
}
}
return(y);
}
