Error - Subscript indices must either be real positive integers or logicals ??

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Yugal Gupta
Yugal Gupta 2017-6-5
回答： the cyclist 2017-6-5
sym(zeros(4, 1));
is showing an error "Subscript indices must either be real positive integers or logicals". What may be the reason behind this error? How it can be resolved ??

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回答（1 个）

the cyclist
the cyclist 2017-6-5
Is it possible that you have defined a variable named sym, and you are trying to index into that? What does the command
which sym
give?
If that gives a variable name, that's presumably the problem. Remember not to use variable names that are MATLAB keywords.

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