Matlab个人笔记向--基础绘图篇

简单绘图部分：

%简单绘图
x=0:1:10;
y=x.^2-10*x+15; %n次方中注意小圆点
plot(x,y);
title('Plot of y=x^2+10*x+15');
xlabel('x');
ylabel('y');
grid on; %显示网格

%联合作图
x = 0:pi/100:2*pi;
y1 = sin(2*x);
y2 = 2*cos(2*x);
plot(x,y1,x,y2)

x = 0:pi/100:2*pi;
y1 = sin(2*x);
y2 = 2*cos(2*x);
plot(x,y1,'ro',x,y2,'b--');% y1-red+circle; y2-blue+dashed

legend('string1','string2',...,pos) %图例,pos值用来指定图例位置
legend off %去除多余的图例

x = 0:pi/100:2*pi;
y1 = sin(2*x);
y2 = 2*cos(2*x);
plot(x,y1,'r-',x,y2,'bx');
title('Plot of y=sin2x and its derivative');
xlabel('x');
ylabel('y');
legend('y1=sin2x','y2=2cos2x');
grid on;