Undefined function 'symsum' for input arguments of type 'double'

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Laura Barroso
Laura Barroso 2018-3-28
编辑： Jan 2018-5-25
function [ yij ] = SPCmethod(yij,w)
sym n;
rep = 100;
for i = 1:w
yij(i) = mean (symsum(yij,i,1,rep))/rep
end
  1 个评论
Jan
Jan 2018-5-25
[MOCED from flags] Yuichi Tadokoro wrote
Flagged as Unclear
@Yuichi Tadokoro: Please use flags only to inform admins and editors about content, which conflicts with the terms of use, e.g. spam or rudeness. Thanks.

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回答（1 个）

Jan
Jan 2018-5-25
编辑：Jan 2018-5-25
The error message is clear: yij is a variable of type double, but symsum needs a symbolical expressions. Please post, what you use as input to this function.
Omit the useless sym n;, because n is not used anywhere.

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