用MATLAB编程计算.docx

1、 对n=1,2,10,求xn= 的值.编程：function x=yi(n)for n=1:10 x(n)=sin(n*pi/10);endx运行：x = 0.3090 0.5878 0.8090 0.9511 1.0000 0.9511 0.8090 0.5878 0.3090 0.0000ans =0.3090 0.5878 0.8090 0.9511 1.0000 0.9511 0.8090 0.5878 0.3090 0.00002、 设银行年利率为11.25%.将10000元钱存入银行，问多长时间会连本带利翻一番？编程：function money=er(years)money=10000years=0while money1 f=x2+1endif xsan(2) f =5 ans =5san(-1) f = -2 ans =-24、编程1：function f=si(x)if x1 f=x2+1else if x si(2)f =5 ans =5 si(0.5)f =1 ans =1 si(-1)f =-1 ans =-1编程2：function f=sisi(x)f=(x2+1)*(x1)+2*x*(x0&x=1)+x3*(x sisi(2)f =5 ans =5 sisi(0.5)f =1 ans =1 sisi(-1)f =-1 ans =-15、计算向量x=1,2,3,4;3,4,5,6的与矩阵x=1,2,3,4;3,4,5,6的期望值与方差编程：function mean,stdev=wu(x)m,n=size(x);if m=1 m=n;endmean=sum(x)/m;stdev=sqrt(sum(x.2)/m-mean.2);运行： x=1,2,3,4;3,4,5,6; mean,stdev=wu(x)mean =2.5000 4.5000stdev =1.1180 1.1180 x=1,2,3,4;3,4,5,6; mean,stdev=wu(x)mean =2 3 4 5stdev =1 1 1 16、函数的递归调用: 阶乘计算11！ 21！编程：function fac=liu(n)if n=1|n=0; fac=1; returnendfac=n*liu(n-1);运行： liu(11)ans = 39916800 liu(21)ans = 5.1091e+0197、有一天小猴摘下了若干个桃子,当即吃掉了一半,又多吃了一个.第二天接着吃了剩下的一半,又多吃了一个以后每天都是吃掉尚存的桃子的一半零一个.到第十天早上,小猴准备吃桃子时,看到只剩下 1 个桃子了.问小猴第一天共摘下了多少个桃子？ 编程：function p=qi(k)k=10;p(k)=1;while k=2 k=k-1; p(k)=2*(p(k+1)+1);endp(1)运行：ans =1534ans = 1534 766 382 190 94 46 22 10 4 18、求100以内的素数及其个数function m=ba(n) n=0; for m=1:100 flag=1;j=m-1; i=2; while i1）运行：N=25ans =2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97ans =1009、已知多项式为，求其根。编程：function h=jiu(x)h=roots(1 -10 31 -10 -116 200 -96) 运行：h =-2.0000 4.0000 3.0000 2.0000 + 0.0000i 2.0000 - 0.0000i 1.0000 ans =-2.0000 4.0000 3.0000 2.0000 + 0.0000i 2.0000 - 0.0000i 1.0000 10、已知多项式的根h =-2.0000 4.0000 3.0000 2.0000 + 0.0000i 2.0000 - 0.0000i 1.0000 求多项式 编程：function c=shi(h)h=-2.0000 4.0000 3.0000 2.0000+0.0000i 2.0000-0.0000i 1.0000;c