清空筛选条件
清空筛选条件

String to actual function

1 次查看（过去 30 天）
Ninad Pimpalkhare
回答： madhan ravi 2020-7-9
Hi,
I have a string array A having 100 entries. The entries are like 1) X1+X2
2) X3+X4
3) X5+X10....etc
where X1, X2,....are variables already existing in the workspace and contain numerical data.
The string array A containing the functions as string, I need to execute it as in, if first entry of string is X1+X2, it pick the entry from the string and actually executes function X1+X2and stores the result in some other variable like H1.
can someone provide the code for it?

请先登录，再回答此问题。

回答（2 个）

Image Analyst
Image Analyst 2020-7-9
X1 = randi(9, 1, 5)
X2 = randi(9, 1, 5)
str = 'X1+X2'
H = eval(str)
X1 =
8 2 5 5 6
X2 =
7 7 3 7 6
str =
'X1+X2'
H =
15 9 8 12 12
That said, see the FAQ: FAQ Why is it advised to avoid using the eval function?
madhan ravi
madhan ravi 2020-7-9
AVOID EVAL:
X1 = randi(9, 1, 5)
X2 = randi(9, 1, 5)
str = 'X1+X2'
H = subs(str2sym(str)) % requires symbolic toolbox

类别

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

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by