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How can i use symbolic variables which were created as a vector?

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Volkan Yangin
Volkan Yangin on 12 Jan 2021
Answered: KSSV on 12 Jan 2021
Hi,
x_opr=[1 2 3 4 5 6 7 8 9];
syms sv
sv=sym('x',[1 numel(x_opr)])
Output of this command is:
sv =
[ x1, x2, x3, x4, x5, x6, x7, x8, x9]
x1 to x9 will be used in some calculations, but i have an error message: Undefined function or variable 'x2'.
It seems that i have to define x1 to x9 as symbolic again, but i have already wrote them as a vector. Where is my wrong?
Thanks,

Answers (1)

KSSV
KSSV on 12 Jan 2021
What you have shown will not work and it is meaning less. You have to use:
x = [1 2 3 4 5 6 7 8 9];
Where veer you have x1, x2, ..x9 etc....use x(1), x(2), .....x(9). Read about matrix indexing in MATLAB.

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