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Error that X is used but not initalized.

3 次查看（过去 30 天）
Zayin Jarrez
Zayin Jarrez 2024-3-4
回答： Sibghat 2024-3-4
My super simply Live script code
"
syms I
O(I)=14.6*10^(-3)*I
"
Output:
Warning: Uninitialized variable 'x' is used.
Bruh, i dont have an X in sight..... Maple>>matlab

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回答（2 个）

VBBV
VBBV 2024-3-4
Ran in:
syms I
O = 14.6*10^(-3)*I % define this way
O = 
O(I) = 14.6*10^(-3)*I
Warning: Uninitialized variable 'x' is used.
O(I) = 
  1 个评论
VBBV
VBBV 2024-3-4
Possibly due to assigning symoblic variables as function of implicitly defined variables

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Sibghat
Sibghat 2024-3-4
Ran in:
One possible explanation to the error message could be that MATLAB is interpreting 'I' as 'x'. You don't need to define O(I) as you would in a symbolic math toolbox. Instead, you can define O as a function of I.
syms I
O(I) = 14.6 * 10^(-3) * I
Warning: Uninitialized variable 'x' is used.
O(I) = 
O = 14.6 * 10^(-3) * I
O = 
PS: I read somewhere that MATLAB interprets undefined variable as 'x' by default in symbolic expressions. So, perhaps when you're defining O(I), MATLAB interprets it as O(x). However, I'd need to confirm that to be certain...

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