Zirui_Cao的博客

#计算回归曲线，并预测x = 1300时的值A = matrix(nrow = 10,ncol = 2)A[,1] = c(5800,4980,6200,6800,7100,8900,9000,8100,9990,9800)A[,2] = c(560,530,600,680,750,830,880,830,980,1100)B = A[,2]-mean(A[,2])C = A[,1]-m...

################################常用算法——枚举法###################################计算函数f（x） = 1-(1+x)^(-10)-6.71*x的根#forf = function(x) 1-(1+x)^(-10)-6.71*xa = NULLx = seq(-1,1,by = 1e-4)for(i in...

#########################常用算法——递推法##################################求斐波那契数列前40个数的和F = NULL #不定义维数有关系吗？事实证明，向量没关系，矩阵不行。F[1] = 1F[2] = 1for(i in 3:40){F[i] = F[i-1]+F[i-2]}sum(F)...

############################常用算法——二分法####################################用二分法求下面方程在(-10,10)的根.2*x^3-4*x^2+3*x-6 = 0#whilef = function(x) 2*x^3-4*x^2+3*x-6x0 = -10;x1 = 10while(abs(x0-x1)>...

#########################常用算法——导数与微分的近似计算##########################例题：用导数的近似计算求函数f(x) = -4*x^2+3*x+2在[0,1]的极值f = function(x) -4*x^2+3*x+2ub = 1lb = 0m = 1000000step = (ub-lb)/mx = 0for...