Creating an empty sym variable?

2013 2 15
1 个回答
回答已采纳
5 次查看（30 天）

0 个投票

Hello,
How I can create an empty 0x0 sym variable? Such as x=[] x={}, expect I want to make x an empyt sym, not an empty double or cell.
Thank you, Kevin

请先登录，再回答此问题。

 采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-2-15

0 个投票

x=sym([])

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Kevin Bachovchin
Kevin Bachovchin 2013-2-15
That does create the variable but it doesn't do what I want. If I have the following code
syms y x = sym([]); Sum = x+y
makes Sum an empty sym as well. I want Sum to just be y, if x is empty. Is there a way to define x in order to do that?
Azzi Abdelmalek
Azzi Abdelmalek 2013-2-15
Even with double
x=[];
y=10
a=y+x % is different from y, it gives []
a=[x y], % gives y
Now with sym
x=sym([])
syms y
a=x+y, % the result is x
a=[x y] % the result is y
Azzi Abdelmalek
Azzi Abdelmalek 2013-2-15
Maybe your are looking for
x=sym('0')

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Calculus 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