| 查看: 598 | 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
体制内长辈说体制内绝大部分一辈子在底层，如同你们一样大部分普通教师忙且收入低
已经有10人回复
-
过年走亲戚时感受到了所开私家车的鄙视链
已经有9人回复
-
今年春晚有几个节目很不错，点赞！
已经有10人回复
-
情人节自我反思：在爱情中有过遗憾吗？
已经有10人回复
-
基金正文30页指的是报告正文还是整个申请书
已经有5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: 18688.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 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: 18688.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 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: 18688.9
- 散金: 184
- 红花: 7
- 帖子: 2501
- 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