Extract exponent of term in symbolic expression?

8 次查看（过去 30 天）

Adam Darcie 2020-4-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520294-extract-exponent-of-term-in-symbolic-expression

评论： Adam Darcie 2020-4-26

Let's say I have some symbolic expression expression:

syms a b c d
expression=a^2*b^4*c^3*d

I want to extract the exponent of a given symbol. For example, if I ask for the exponent of a, it should give 2. I can't seem to find any solutions that work in the current version of Matlab. There must be some simple way of doing this in 2020 right?

Thanks in advance!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Christopher Creutzig 2020-4-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520294-extract-exponent-of-term-in-symbolic-expression#answer_428063

在 MATLAB Online 中打开

I believe you are looking for polynomialDegree:

>> polynomialDegree(expression,a)
ans =
     2

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Adam Darcie 2020-4-26

I knew something like this had to exist but I couldn't find it. Thanks!

请先登录，再进行评论。

请先登录，再回答此问题。

类别

Mathematics and Optimization Symbolic Math Toolbox

在 Help Center 和 File Exchange 中查找有关 Symbolic Math Toolbox 的更多信息

产品

MATLAB

版本

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by