/**
* <summary>
* コンストラクタ Row Col
* </summary>
* <param name="row">行</param>
* <param name="col">列</param>
*/
public Matrix(matidx_t row, matidx_t col)
{
// ToDo: row=0は例外
// ToDo: col=0は例外
this.row = row;
this.col = col;
this.elems = new matelem_t[row, col];
}
/**
* <summary>
* コンストラクタ Array
* </summary>
* <param name="elems">要素</param>
*/
public Matrix(matelem_t[,] elems)
{
// ToDo: elems=nullは例外
// ToDo: elems.GetLength(0)=0は例外
// ToDo: elems.GetLength(1)=0は例外
this.row = elems.GetLength(0);
this.col = elems.GetLength(1);
this.elems = elems;
}
/**
* <summary>
* 要素のスワップ
* </summary>
* <param name="a_i">要素aのi行目</param>
* <param name="a_j">要素aのj列名</param>
* <param name="b_i">要素bのi行目</param>
* <param name="b_j">要素bのj列目</param>
*/
public void Swap(matidx_t a_i, matidx_t a_j, matidx_t b_i, matidx_t b_j)
{
// ToDo: row1 <= 0 || this.row - 1 < row1 は例外
// ToDo: col1 <= 0 || this.col - 1 < col1 は例外
// ToDo: row2 <= 0 || this.row - 1 < row2 は例外
// ToDo: col2 <= 0 || this.col - 1 < col2 は例外
matelem_t tmp;
tmp = this[a_i, a_j];
this[a_i, a_j] = this[b_i, b_j];
this[b_i, b_j] = tmp;
}
/**
* <summary>
* 行列のスカラー倍
* </summary>
* <param name="sclr">スカラー値</param>
* <param name="a">行列A</param>
*/
public static Matrix operator *(double sclr, Matrix a)
{
// ToDo: a=nullは例外
Matrix result = new Matrix(a.Row, a.Col);
for (matidx_t i = 0; i < result.Row; i++)
{
for (matidx_t j = 0; j < result.Col; j++)
{
result[i, j] = sclr * a[i, j];
}
}
return(result);
}
/**
* <summary>
* インデクサ
* </summary>
* <param name="row">行</param>
* <param name="col">列</param>
*/
public matelem_t this[matidx_t row, matidx_t col]
{
set
{
// ToDo: row <= 0 || this.row - 1 < rowは例外
// ToDo: col <= 0 || this.col - 1 < colは例外
this.elems[row, col] = value;
}
get
{
// ToDo: row <= 0 || this.row - 1 < rowは例外
// ToDo: col <= 0 || this.col - 1 < colは例外
return(this.elems[row, col]);
}
}
/**
* <summary>
* 行列の足し算
* </summary>
* <param name="a">行列A</param>
* <param name="b">行列B</param>
*/
public static Matrix operator +(Matrix a, Matrix b)
{
// ToDo: a=nullは例外
// ToDo: b=nullは例外
// ToDo: a.Row != b.Row || a.Col != b.Colは例外
Matrix result = new Matrix(a.Row, a.Col);
for (matidx_t i = 0; i < result.Row; i++)
{
for (matidx_t j = 0; j < result.Col; j++)
{
result[i, j] = a[i, j] + b[i, j];
}
}
return(result);
}
/**
* <summary>
* 行列の掛け算
* </summary>
* <param name="a">行列A</param>
* <param name="b">行列B</param>
*/
public static Matrix operator *(Matrix a, Matrix b)
{
// ToDo: a=nullは例外
// ToDo: b=nullは例外
// ToDo: a.Col != b.Rowは例外
Matrix result = new Matrix(a.Row, b.Col);
for (matidx_t i = 0; i < result.Row; i++)
{
for (matidx_t j = 0; j < result.Col; j++)
{
result[i, j] = 0.0;
for (matidx_t k = 0; k < a.Col; k++)
{
result[i, j] += a[i, k] * b[k, j];
}
}
}
return(result);
}
