public Vector MatrixOnVectorMultiplication(Vector vector)
{
if (GetColumnsCount() != vector.GetSize())
{
throw new ArgumentException("Vector must be <= columns count", nameof(vector));
}
double[] value = new double[GetRowsCount()];
for (int i = 0; i < GetRowsCount(); i++)
{
value[i] = Vector.ScalarMultiplication(vector, Rows[i]);
}
return(new Vector(value));
}
public static Matrix Multiplication(Matrix firstMatrix, Matrix secondMatrix)
{
if (firstMatrix.GetColumnsCount() != secondMatrix.GetRowsCount())
{
throw new Exception("Columns count 1 matrix must be equals rows count 2 matrix and rows count 1 matrix must be equals columns count 2 matrix");
}
Matrix matrix = new Matrix(firstMatrix.GetRowsCount(), secondMatrix.GetColumnsCount());
double[] value = new double[matrix.GetColumnsCount()];
for (int i = 0; i < matrix.GetRowsCount(); i++)
{
for (int j = 0; j < matrix.GetColumnsCount(); j++)
{
value[j] = Vector.ScalarMultiplication(firstMatrix.Rows[i], secondMatrix.GetColumn(j));
}
matrix.Rows[i] = new Vector(value);
}
return(matrix);
}