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arduino-cli/libraries/MatrixMath/examples/MatrixMathExample/MatrixMathExample.ino

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+#include <MatrixMath.h>
+
+
+#define N  (2)
+
+float A[N][N];
+float B[N][N];
+float C[N][N];
+float v[N];      // This is a row vector
+float w[N];
+
+float max = 10;  // maximum random matrix entry range
+
+void setup()
+{
+	Serial.begin(9600);
+
+	// Initialize matrices
+	for (int i = 0; i < N; i++)
+	{
+		v[i] = i + 1;                  // vector of sequential numbers
+		for (int j = 0; j < N; j++)
+		{
+			A[i][j] = random(max) - max / 2.0f; // A is random
+			if (i == j)
+			{
+				B[i][j] = 1.0f;                  // B is identity
+			}
+			else
+			{
+				B[i][j] = 0.0f;
+			}
+		}
+	}
+
+}
+
+void loop()
+{
+
+	Matrix.Multiply((float*)A, (float*)B, N, N, N, (float*)C); //矩阵乘法
+
+	Serial.println("\nAfter multiplying C = A*B:");
+	Matrix.Print((float*)A, N, N, "A");
+
+	Matrix.Print((float*)B, N, N, "B");
+	Matrix.Print((float*)C, N, N, "C");
+	Matrix.Print((float*)v, N, 1, "v");
+
+	Matrix.Add((float*) B, (float*) C, N, N, (float*) C); //矩阵加法
+	Serial.println("\nC = B+C (addition in-place)");
+	Matrix.Print((float*)C, N, N, "C"); //串口打印矩阵C
+	Matrix.Print((float*)B, N, N, "B"); //串口打印矩阵B
+
+	Matrix.Copy((float*)A, N, N, (float*)B); //复制矩阵A到矩阵B
+	Serial.println("\nCopied A to B:");
+	Matrix.Print((float*)B, N, N, "B");  //串口打印矩阵B
+
+	Matrix.Invert((float*)A, N); //矩阵求逆
+	Serial.println("\nInverted A:");
+	Matrix.Print((float*)A, N, N, "A");
+
+	Matrix.Multiply((float*)A, (float*)B, N, N, N, (float*)C);
+	Serial.println("\nC = A*B");
+	Matrix.Print((float*)C, N, N, "C");
+
+	// Because the library uses pointers and DIY indexing,
+	// a 1D vector can be smoothly handled as either a row or col vector
+	// depending on the dimensions we specify when calling a function
+	Matrix.Multiply((float*)C, (float*)v, N, N, 1, (float*)w);
+	Serial.println("\n C*v = w:");
+	Matrix.Print((float*)v, N, 1, "v");
+	Matrix.Print((float*)w, N, 1, "w");
+
+	while(1);
+}