C#矩阵运算类库 -- 一些补充

Posted 2021-11-02 Thomas会写字

 重点补充，发现原类中没有深度复制（也许是我没找到。。。）

于是修改如下

MatrixAlgebra --> Matrix.cs --> Initialize函数

        private void Initialize(double[,] Elements)
        {
            elements = Elements.CopyMatrix();
            SubMat = new MatrixSubset(elements);
        }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using LinearAlgebra;
using LinearAlgebra.VectorAlgebra;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            double[] d1 = new double[20];
            double[] d2 = new double[20];

            for (int i = 0; i < 20; i++)
            {
                d1[i] = i;
                d2[i] = i*i;
            }

            // 矩阵的创建
            Matrix A = Matrix.Create(4, 5, d1);
            Matrix B = Matrix.Create(4, 5, d2);
            Matrix Mat = Matrix.Create(2, 2, new double[] { 1, 2, 3, 4 });

            // 矩阵的深度复制
            Matrix C = new Matrix(A.Elements);

            // 矩阵元素获取修改            
            double[,] D = A.Elements;  
            double dData = C.ElementAt(2);
            A[1, 1] = 666;
            A.SetColumn(1, B.GetColumn(1));

            // 向量处理
            Vector v1 = Vector.Range(VectorType.Row, 2, 10, 0.1);
            Vector v2 = Vector.Range(VectorType.Row, 1, 10, 0.1);
            Vector v3 = v1 * v2;

            // 元素获取
            double[] dVec = v3.Elements;

            Console.WriteLine(A);
            Console.WriteLine(C);
            Console.WriteLine(v3);
        }
    }
}