Common factor

2011 9 29
1 个回答
更新时间：2024 4 22
9 次查看（30 天）

0 个投票

Is there a function to make it find a common factor in an expression with symbolic variables?
For example:
ab+ac--(matlab command)--->a(b+c)
Thanks

请先登录，再回答此问题。

回答（1 个）

Andrei Bobrov
Andrei Bobrov 2011-9-29

0 个投票

help factor
syms a b c
factor(a*c + b*c)

6 个评论
显示 4更早的评论 隐藏 4更早的评论

cyberdyne
cyberdyne 2011-9-29
I've tried that but it worked one time only....now returns me the error:
Error using==>subsindex
Function 'subsindex' is not defined for values of class 'sym'
How is it possible?
Walter Roberson
Walter Roberson 2011-9-30
Did you happen to define a new factor.m ? Try
which factor
cyberdyne
cyberdyne 2011-10-3
No. The error returns if I use 'factor' funcion in command window while editor runs.
A bug?
Walter Roberson
Walter Roberson 2011-10-3
I haven't heard of that one before. Does that include if the editor is up but showing no files at all ?
Zoya Saevna
Zoya Saevna 2021-2-3
You shouldn't be kidding!
Steven Lord
Steven Lord 2024-4-22
Ran in:
Ran in:
I know this part of the discussion is kind of old, but that error message cyberdyne quoted is likely to occur if for example the user were to store the output of the call to the factor function to a variable named factor in the Command Window. [Though it appears the text of the error message may have changed in the decade+ since the original message.]
syms a b c
f = a*b+a*c
f = 
factor = factor(f) % This first call works
factor = 
z = factor(f) % This second one does not, since factor is now a variable
Error using indexing (line 918)
Invalid MATLAB indexing or symbolic function definition. Symbolic function arguments must be symbolic variables and function body must be convertible to sym expression.

Error in indexing (line 962)
R_tilde = builtin('subsref',L_tilde,Idx);

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by