作业帮matlab程序解释下面这段程序的含义,尤其是最后两个语句,y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x')x=0:0.01:0.5;yy=subs(y,x);fun=inline('-2*y+2*x*x+2*x');[x,y]=ode15s(fun,[0:0.01:0.5],1);ys=x.*x+exp(-2*x);plot(x,y,'r',x,ys,'b')；
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![matlab程序解释下面这段程序的含义,尤其是最后两个语句,y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x')x=0:0.01:0.5;yy=subs(y,x);fun=inline('-2*y+2*x*x+2*x');[x,y]=ode15s(fun,[0:0.01:0.5],1);ys=x.*x+exp(-2*x);plot(x,y,'r',x,ys,'b')；](/uploads/image/z/3164149-37-9.jpg?t=matlab%E7%A8%8B%E5%BA%8F%E8%A7%A3%E9%87%8A%E4%B8%8B%E9%9D%A2%E8%BF%99%E6%AE%B5%E7%A8%8B%E5%BA%8F%E7%9A%84%E5%90%AB%E4%B9%89%2C%E5%B0%A4%E5%85%B6%E6%98%AF%E6%9C%80%E5%90%8E%E4%B8%A4%E4%B8%AA%E8%AF%AD%E5%8F%A5%2Cy%3Ddsolve%28%27Dy%3D-2%2Ay%2B2%2Ax%5E2%2B2%2Ax%27%2C%27y%280%29%3D1%27%2C%27x%27%29x%3D0%3A0.01%3A0.5%3Byy%3Dsubs%28y%2Cx%29%3Bfun%3Dinline%28%27-2%2Ay%2B2%2Ax%2Ax%2B2%2Ax%27%29%3B%5Bx%2Cy%5D%3Dode15s%28fun%2C%5B0%3A0.01%3A0.5%5D%2C1%29%3Bys%3Dx.%2Ax%2Bexp%28-2%2Ax%29%3Bplot%28x%2Cy%2C%27r%27%2Cx%2Cys%2C%27b%27%29%EF%BC%9B)
matlab程序解释下面这段程序的含义,尤其是最后两个语句,y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x')x=0:0.01:0.5;yy=subs(y,x);fun=inline('-2*y+2*x*x+2*x');[x,y]=ode15s(fun,[0:0.01:0.5],1);ys=x.*x+exp(-2*x);plot(x,y,'r',x,ys,'b')；
matlab程序解释
下面这段程序的含义,尤其是最后两个语句,
y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x')
x=0:0.01:0.5;
yy=subs(y,x);
fun=inline('-2*y+2*x*x+2*x');[x,y]=ode15s(fun,[0:0.01:0.5],1);ys=x.*x+exp(-2*x);
plot(x,y,'r',x,ys,'b')；
matlab程序解释下面这段程序的含义,尤其是最后两个语句,y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x')x=0:0.01:0.5;yy=subs(y,x);fun=inline('-2*y+2*x*x+2*x');[x,y]=ode15s(fun,[0:0.01:0.5],1);ys=x.*x+exp(-2*x);plot(x,y,'r',x,ys,'b')；
y=dsolve('Dy=-2*y+2*x^2+2*x','y(0)=1','x') %求常微分方程的解析解
x=0:0.01:0.5; %自娈量的值
yy=subs(y,x); %解析解在自变量处的值
fun=inline('-2*y+2*x*x+2*x'); %定义一下常微分方程的右边项
[x,y]=ode15s(fun,[0:0.01:0.5],1); %常微分方程的数值解
ys=x.*x+exp(-2*x); %这个应当是解析解 这个有点多余,因为这个与yy是重复的.
plot(x,y,'r',x,ys,'b'); %建议改成plot(x,y,'r',x,ys,'b*')会更好看一些.