矩阵的数乘

[java]代码库

	/**
	 * 矩阵的数乘，结果矩阵行列数不变 c[i][j] = num * a[i][j]
	 * 
	 * @param num
	 * @return
	 */
	public Matrix multiplyNum(double num) {
		int cRow = this.matrixData.length;
		int cColumn = this.matrixData[0].length;
		double[][] cData = new double[cRow][cColumn];
		for (int i = 0; i < cRow; i++) {
			for (int j = 0; j < cColumn; j++) {
				cData[i][j] = num * this.matrixData[i][j];
			}
		}
		return new Matrix(cData);
	}