MATLAB中PLOT 的例子 源代码

 

clear all;                               % 清除各种变量
syms x  ;                             % 定义x为符号变量
A=[3 2 1 1;3 2 2-x^2 1;5 1 3 2;7-x^2 1 3 2];   % 给矩阵A赋值
D=det(A);                             % 计算矩阵A的行列式D
f=factor(D);                             %对行列式D进行因式分解
X=solve(D);                            %求解方程“D＝0”的

clear all;clc;close all;
% 方法一
figure(1);
x1=[0,0.1, 0.2, 0.3, 0.4 , 0.5,0.6,0.7];
y1=[1, 0.77, 0.65, 0.5, 0.36, 0.23,0.15,0.07];
plot(x1,y1,'-sr','MarkerSize',10);

hold on;
x2=[0,0.1, 0.2, 0.3, 0.4 , 0.5,0.6,0.7];
y2=[1, 0.85, 0.73, 0.67, 0.58, 0.53,0.4,0.3];
plot(x2,y2,'-*k');

hold on;
x3=[0,0.1, 0.2, 0.3, 0.4 , 0.5,0.6,0.7];
y3=[1, 0.92, 0.86, 0.8, 0.74, 0.68,0.55,0.45];
plot(