离散随机线性系统的卡尔曼滤波。 其中13lman.c是卡尔曼滤波函数，4rinv.c是滤波函数中用到的矩阵求逆函数，13lman0.c是主程序。-discrete stochastic linear Kalman filtering system. 13lman.c which is the Kalman filter function, 4rinv.c filtering function is used in the matrix inversion function, is the m