matlab语言应用答案

②程序：symsxy1=limit((3^x+9^x)^(1/x),x,inf)y2=limit(((x+2)^(x+2)*(x+3)^(x+3))/((x+5)^(2*x+5)),x,inf)运行结果：y1=9y2=exp(-5)4．绘图题目：选择合适的步距绘制下面的图形，。程序：t=-1:0.001:1;Y=sin(1./t);plot(t,Y)运行结果：题目：画出函数和积分在区间[0,4]上的曲线。程序：symsxysy=x*sin(x);s=int(y);ezplot(y,[0,4])holdonezplot(s,[0,4])holdoff运行结果：题目：绘制函数的二维等高线和填充等高线；程序：z='sin(x)+cos(x+y)';figure(1)ezsurf(z,[-pi/2,pi/2])figure(2)ezcontour(z,[-pi/2,pi/2])figure(3)ezcontourf(z,[-pi/2,pi/2])运行结果：题目：用三角网线，曲面图表现函数，。程序：rand('seed',22),X=6*pi*(rand(20,10)-0.5);Y=6*pi*(rand(20,10)-0.5);R=sqrt(X.^2+Y.^2)+eps;Z=sin(R)./R;tri=delaunay(X,Y);subplot(1,2,1),trimesh(tri,X,Y,Z)subplot(1,2,2),trisurf(tri,X,Y,Z)colormap(jet)brighten(0.5)运行结果：5．曲线拟合及插值运算题目：假设已知一组数据，试用插值法绘制出区间内的光滑曲线，比较各插值算法的优劣。-2-1.7-1.4-0.8-0.50.10.40.711.3-0.2-1.10.102890.117410.131580.1156560.166220.17750.178530.178350.171090.163020.173320.144831.61.92.22.83.13.744.34.64.93.42.50.152550.14020.126550.97680.083530.057860.046870.037290.029140.022360.070150.11219程序：x=[-2,-1.7,-1.4,-0.8,-0.5,0.1,0.4,0.7,1,1.3,-0.2,-1.1,1.6,1.9,2.2,2.8,3.1,3.7,4 ,4.3,4.6,4.9,3.4,2.5];y=[0.10289,0.11741, 0.13158,0.115656,0.16622,0.1775,0.17853,0.17835,0.17109,0.16302,...0.17332,0.14483,0.15255,0.1402,0.12655,0.9768, 0.08353 ,0.05786,0.04687,0.03729,...0.02914,0.02236,0.07015,0.11219];x0=-2:0.02:4.9;y1=interp1(x,y,x0,'cubic');y2=interp1(x,y,x0,'spline');plot(x0,y1,':',x0,y2,x,y,'o')运行结果：题目：用生成一组比较稀疏的数据，并用一维插值法对其给出的数据进行曲线拟合，并将结果及理论曲线进行比较。程序：figure(1)t=0:0.2:2;y=t.^2.*exp(-5*t).*sin(t);plot(t,y,'o')figure(2)ezplot('t.^2.*exp(-5*t).*sin(t)',[0,2]);holdonx1=0:0.01:2;y1=interp1(t,y,x1,'spline');plot(x1,y1)运行结果：设计体会及建议所有运算都以M文件程序方式给出；每位同学设定的数据不能相同；程序有注释。为以下题目画出程序流程并编写运行程序，附运行结果。所有运算都以M文件程序方式给出；每位同学设定的数据不能相同；程序有注释。为以下题目画出程序流程并编写运行程序，附运行结果。所有运算都以M文件程序方式给出；每位同学设定的数据不能相同；程序有注释。为以下题目画出程序流程并编写运行程序，附运行结果。所有运算都以M文件程序方式给出；每位同学设定的数据不