精品文档---下载后可任意编辑目录第一章.................................................................................................................................1第二章.................................................................................................................................5第三章...............................................................................................................................12第四章...............................................................................................................................32第五章...............................................................................................................................47第六章...............................................................................................................................54补充题 欧拉法，龙格库塔法解方程，黑板上的题......................................................571.创建表达式%可以用 syms 先符号运算再带入值x=1;y=2;z=(sqrt(4*x^2+1)+0.5457*exp(-0.75*x^2-3.75*y^2-1.5*x))/(2*sin(3*y)-1)z = -1.4345 2.计算复数x=(-1+sqrt(-5))/4;y=x+8+10jy = 7.7500 +10.5590i 3.help 命令学三维曲线x=-5:0.1:5;y=x;[X,Y]=meshgrid(x,y);Z=(sin(sqrt(X.^2+Y.^2)))./(sqrt(X.^2+Y.^2));subplot(221);surf(X,Y,Z);colormap(cool);subplot(222);plot3(X,Y,Z,'linewidth',4); %绘制三维曲线，也可以随意给定一个三维曲线的函数。假如画这个曲面，那么将绘出一族三维曲线grid on;subplot(223);meshz(X,Y,Z); %地毯绘图subplot(224);meshc(X,Y,Z); %等高线绘图4.peaks 等高线（更改原函数）subplot(221);contour(peaks1,20);subplot(222);contour3(peaks1,10); %可以定义等高线条数subplot(223);contourf(peaks1,10);subplot(224);peaks1;z = 3*(1-x).^2.*exp(-(x.^2) - (y+1).^2) ... - 10*(x/5 - x.^3 - y.^5).*exp(-x.^2-y.^2) ... - 1/3*exp(-(x+1).^2 - y.^2) 精品文档---下载后可任意编辑5. LOGO 绘制membranelogo第一章书后习题1.合法性不合法合法不合法不合法合法2.运行命令及探讨a=sqrt(2)a = 1.4142 答：不是精确的。是一个近似。可通过改变 format 进行位数...
