[交流] 【求助】求解带积分的方程 已有5人参与

Originally posted by haoshihuang at 2010-06-02 14:05:07:
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Originally posted by haoshihuang at 2010-06-02 16:00:05:



不行啊！！
>> solve(1=ln(exp(y-1)+1)+int(x.^0.5/(1+exp(x-y)),x=0..10))
??? solve(1=ln(exp(y-1)+1)+int(x.^0.5/(1+exp(x-y)),x=0..10))
           |
Error: The expression to the left of ...

Originally posted by 孤鸿飘逸 at 2010-06-02 16:26:11:
要自己编程序的   这是积分方程

Originally posted by haoshihuang at 2010-06-02 16:23:40:



我的是matlab 7.0版本啊。你的是多少啊？
加我QQ258251563帮忙一下吧。

Originally posted by change0618 at 2010-06-02 18:00:21:



我的也是啊，怎么出不来你的效果？

Originally posted by haoshihuang at 2010-06-02 14:05:07:
如何用matlab 求解带积分的非线性方程，如下方程：


[/img]


1.给定n,如何求解对应的y值 ;
2。如何画出n与y的关系曲线 ...

Originally posted by haoshihuang at 2010-06-02 14:05:07:
如何用matlab 求解带积分的非线性方程，如下方程：


[/img]


1.给定n,如何求解对应的y值 ;
2。如何画出n与y的关系曲线 ...

n=[];
for y=0:10
fun=@(x) x.^0.5./(1+exp(x-y))
yyi=quad(fun,0,10);
n=[n;yyi+log(exp(y-1)+1)]  %输出y对应的n
end
y=1:11;
line(y,n','Marker','o');%作图
xlabel('y')
ylabel('n')

Originally posted by haoshihuang at 2010-06-03 18:18:22:



兄弟，你太历害了，不过我的还是不能用啊， 能否留下个QQ交流一下啊？？？谢谢啊！！

Originally posted by 彭成松 at 2010-06-05 12:44:30:
楼上用的是哪个软件计算出的？