| 查看: 580 | 回复: 7 | |||
| 当前主题已经存档。 | |||
| 【有奖交流】积极回复本帖子，参与交流，就有机会分得作者 yatlan 的 4 个金币 | |||
[交流]
【求助】matlab 求解方程组时 出错,非常急,好心人帮忙!
|
|||
|
clear; syms a b c d e cl cz ll lz cll lll czl lzl; a=ll*lz*cl*cz; b=ll*cl+lz*cz+lz*cl; c=ll*lz*cl; d=lz; e=(b+(b^2-4*a)^(1/2))/2; cll=(a*(a-e^2))/(e*(a*d-c*e))-3.071; lll=(a*d-c*e)/(a-e^2)-7.533; czl=(a-e^2)/(c-d*e)-1.313; lzl=(e*(c-d*e))/(a-e^2)-3.222; solve(cll,lll,czl,lzl); 如上的程序在最后solve 求解时提示 ??? Error using ==> subsref Index exceeds matrix dimensions. Error in ==> sym.subsref at 16 y = builtin('subsref',struct(x),a); Error in ==> solve at 191 S.(char(symvars(j))) = R(:,j); 再线等................! 非常感谢 |
回复此楼» 猜你喜欢
全日制（定向）博士
已经有5人回复
-
假如你的研究生提出不合理要求
已经有10人回复
-
萌生出自己或许不适合搞科研的想法，现在跑or等等看？
已经有4人回复
-
Materials Today Chemistry审稿周期
已经有4人回复
-
参与限项
已经有3人回复
-
实验室接单子
已经有4人回复
-
对氯苯硼酸纯化
已经有3人回复
-
求助:我三月中下旬出站，青基依托单位怎么办？
已经有12人回复
-
所感
已经有4人回复
-
要不要辞职读博？
已经有7人回复
sorry for some confusiion?
★ ★ ★
小木虫(金币+0.5):给个红包，谢谢回帖交流
sunxiao(金币+2,VIP+0):thank you for your suggestions 10-3 00:13
小木虫(金币+0.5):给个红包，谢谢回帖交流
sunxiao(金币+2,VIP+0):thank you for your suggestions 10-3 00:13
|
1. seems using solve(cll,lll,czl,lzl, 'cz', 'cl', 'lz', 'll') have tried a simple case like what you are going to do. it works. the code is as follows: clear; clc; syms a u v; l=a*u^2 + v^2; m=u-v-1; n=a^2-5*a+6; A=solve(l,m,n, 'a','u','v'); therefore, it seems that your equations are too complicated for the matlab. maybe, the other approaches had to be considered, such as simplify your equations first. anyway, show it up here if you solve the problem. good luck. again: if you remove only one denominator from any one of your four equations, the code can run through to the end after replacing the solve function with the one given above. so, you had to simplify your equations first. [ Last edited by bote on 2009-10-2 at 12:27 ] |
2楼2009-10-02 06:28:38
buffalo7239
至尊木虫 (著名写手)
- 应助: 11 (小学生)
- 金币: 18681.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 在线: 346.4小时
- 虫号: 591173
- 注册: 2008-09-02
- 性别: GG
- 专业: 光学
3楼2009-10-02 08:23:25
buffalo7239
至尊木虫 (著名写手)
- 应助: 11 (小学生)
- 金币: 18681.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 在线: 346.4小时
- 虫号: 591173
- 注册: 2008-09-02
- 性别: GG
- 专业: 光学
4楼2009-10-02 08:26:56
5楼2009-10-02 10:46:28
buffalo7239
至尊木虫 (著名写手)
- 应助: 11 (小学生)
- 金币: 18681.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 在线: 346.4小时
- 虫号: 591173
- 注册: 2008-09-02
- 性别: GG
- 专业: 光学
6楼2009-10-03 09:00:50
7楼2009-10-03 10:01:20
8楼2009-10-03 21:08:37