matlab画出函数y = 2*x -20图像
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/21 14:43:17
y值是个负数,不知道你是想画虚部还是实部functionsolvezhidaoN=15;L=15;d=L/2;k=2*pi/L;x=0:0.01:pi;functiony=fun(x)y=0;forn
num=100;x=0.00001:10/num:10;y=exp(2*x);y=y./x;plot(x,y)
clearx=-1:0.01:1;y=(x.^3).*exp(-x.^2);plot(x,y);title('y=x^3*e^(-x^2)');xlabel('x'),ylabel('y')
functionfdhs1(arg1,arg2)a=arg1;b=arg2;ifa==0&&b>2,x1=linspace(a+eps,1,20);y1=x1.^3+x1.^2+2*x1;[X1,Y1
x=[0:0.01:20*pi]>>y=0.8*sin(x/65);>>plot(x,y);你如果要得到sin(x/65)的三角函数图形你可以用下面语句>>x=[0:0.01:130*pi]>>y=0
clear;clc;x=-2:0.001:2;y=50*(1+x.^4);plot(x,y);
xx=-5:0.1:5;yy=xx;[x,y]=meshgrid(xx,yy);z=x.^2+y.^2+sin(x.*y);subplot(1,2,1)mesh(x,y,z)subplot(1,2,2
ezplot('x^2+y^3+5*x*y-79')
function dz=caonim(t,z)
两种方法:一、离散点作图:x=-1:0.01:1;y=x^2;plot(x,y);二、函数作图:symsx,y;y=x^2;fplot(x,y)
syms x yeq=0.2538*tan(y)-y-1472.39*x*y^3;ezplot(eq,[-1 0.1 -0.5 0.5])
x=-10:0.1:10;y=x-(atan(3./x).^36*2)/(pi*x)-atan(x./3).^35*6/piplot(x,y)gridon
记住用点运算:如:x=0:1:20;y=x.^5-3*x+4;plot(x,y)
x=0:2.5:100;y=x.*exp(-2*x);plot(y);
[x,y]=meshgrid(-2:0.1:2);>>z=0.5-(sin(x.^2+y.^2)-0.5).^2./(1+(x.^2+y.^2)).^2;>>mesh(x,y,z)也可以还可以这样>>
图像如图
很怪异的函数:clearall;clc;z=@(x,y)((x-22).^2+(y-22).^2).^(-20);ezsurf(z,[21.6,22.4],[21.6,22.4]);
ezplot('-2165*x^2-414.5*x+135.5')再问:再问一下怎么求它的极值点再答:func=inline('-2165*x^2-414.5*x+135.5','x'
clear;clc[xy]=meshgrid(0:2:135,0.4:0.01:1);z=3693+7.5*x+24246*y+0.239*x.^2+13508*y.^2-27*x.*y;mesh(x
ezplot('17^2-16*abs(x)*y+17*y^2-225')