[問題] 畫微分方程的圖已回收
function y=fun_12 (x)
y=dsolve('x^3*D3y+x^2*D2y+x*Dy-y=exp(x)/x','y(0)=1','Dy(0)=1','D2y(0)=0')
我在m-file
打這些程式碼
然後在command window
得到
>>fun
y=略
ans=略
plot(x,y)
??? Undefined function or variable 'x'.
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