How to write diff (exp(x.*log(x))) on MATLAB command window?
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I am trying to compute the derivative using the command diff:
syms x
diff (exp(x.*log(x)))
Error using sym/subsindex (line 853)
Invalid indexing or function definition. Indexing must follow MATLAB indexing. Function arguments must be symbolic
variables, and function body must be sym expression.
Error in sym/subsref (line 898)
R_tilde = builtin('subsref',L_tilde,Idx);
4 个评论
Wan Ji
2021-8-25
The syntax can work for my matlab version
>> syms x
diff (exp(x.*log(x)))
ans =
exp(x*log(x))*(log(x) + 1)
Walter Roberson
2021-8-25
I suspect that you have accidentally created a variable named one of diff or exp or log . Of those, it is most common for people to accidentally create diff
N/A
2021-8-25
Thank you. I wil check again.
N/A
2021-8-25
I guess so. It worked once I cleared my workspace. Thank you
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2021-8-25
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