| 查看: 638 | 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
面上本子正文33页，违规吗？会被低分嘛？
已经有10人回复
-
国自然上会要求
已经有9人回复
-
博士申请
已经有5人回复
-
评审有感
已经有6人回复
-
今年审到国自然15份，谈谈感受
已经有16人回复
-
上海大学实验技术岗位非升即走
已经有8人回复
-
考博自荐
已经有6人回复
-
青C资助名额大幅增加！
已经有16人回复
-
重磅！青年科学基金项目（C类）资助增幅预计超过50%
已经有10人回复
-
我在等一个没有答案的答案
已经有3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: 18694.7
- 散金: 184
- 红花: 7
- 帖子: 2502
- 在线: 346.5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: 18694.7
- 散金: 184
- 红花: 7
- 帖子: 2502
- 在线: 346.5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: 18694.7
- 散金: 184
- 红花: 7
- 帖子: 2502
- 在线: 346.5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
30