作业帮matlab程序 求看看解释一条语句clear;clcclear;x=[0:pi/100:3];y=sin(x);p1=polyfit(x,y,2);p2=polyfit(x,y,3);p3=polyfit(x,y,5);x1=0:pi/200:3;y1=polyval(p1,x1);y2=polyval(p2,x1);y3=polyval(p3,x1);plot(x,y,'*r',x1,y1,'-b');title('2阶');hold onpl
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 00:46:52
![matlab程序 求看看解释一条语句clear;clcclear;x=[0:pi/100:3];y=sin(x);p1=polyfit(x,y,2);p2=polyfit(x,y,3);p3=polyfit(x,y,5);x1=0:pi/200:3;y1=polyval(p1,x1);y2=polyval(p2,x1);y3=polyval(p3,x1);plot(x,y,'*r',x1,y1,'-b');title('2阶');hold onpl](/uploads/image/z/1340402-50-2.jpg?t=matlab%E7%A8%8B%E5%BA%8F+%E6%B1%82%E7%9C%8B%E7%9C%8B%E8%A7%A3%E9%87%8A%E4%B8%80%E6%9D%A1%E8%AF%AD%E5%8F%A5clear%3Bclcclear%3Bx%3D%5B0%3Api%2F100%3A3%5D%3By%3Dsin%28x%29%3Bp1%3Dpolyfit%28x%2Cy%2C2%29%3Bp2%3Dpolyfit%28x%2Cy%2C3%29%3Bp3%3Dpolyfit%28x%2Cy%2C5%29%3Bx1%3D0%3Api%2F200%3A3%3By1%3Dpolyval%28p1%2Cx1%29%3By2%3Dpolyval%28p2%2Cx1%29%3By3%3Dpolyval%28p3%2Cx1%29%3Bplot%28x%2Cy%2C%27%2Ar%27%2Cx1%2Cy1%2C%27-b%27%29%3Btitle%28%272%E9%98%B6%27%29%3Bhold+onpl)
matlab程序 求看看解释一条语句clear;clcclear;x=[0:pi/100:3];y=sin(x);p1=polyfit(x,y,2);p2=polyfit(x,y,3);p3=polyfit(x,y,5);x1=0:pi/200:3;y1=polyval(p1,x1);y2=polyval(p2,x1);y3=polyval(p3,x1);plot(x,y,'*r',x1,y1,'-b');title('2阶');hold onpl
matlab程序 求看看解释一条语句
clear;clc
clear;
x=[0:pi/100:3];
y=sin(x);
p1=polyfit(x,y,2);
p2=polyfit(x,y,3);
p3=polyfit(x,y,5);
x1=0:pi/200:3;
y1=polyval(p1,x1);
y2=polyval(p2,x1);
y3=polyval(p3,x1);
plot(x,y,'*r',x1,y1,'-b');title('2阶');
hold on
plot(x,y,'*r',x1,y2,'-b');title('3阶');
hold on
plot(x,y,'*r',x1,y3,'-b');title('5阶');
hold on
plot(x,y,'*r',x1,y1,'-b',x1,y2,'-r',x1,y3,'-y');title('y=sinx')
hold off
其中plot(x,y,'*r',x1,y2,'-b');里面的元素什么意思
matlab程序 求看看解释一条语句clear;clcclear;x=[0:pi/100:3];y=sin(x);p1=polyfit(x,y,2);p2=polyfit(x,y,3);p3=polyfit(x,y,5);x1=0:pi/200:3;y1=polyval(p1,x1);y2=polyval(p2,x1);y3=polyval(p3,x1);plot(x,y,'*r',x1,y1,'-b');title('2阶');hold onpl
先用红色的*描x,y的点,再用蓝色的-描x1,y1的点.
就是形状加颜色的搭配.