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

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Laura Barroso
Laura Barroso 2018-3-28
评论： Walter Roberson 2018-3-29
Can someone please explain me why I have this error? I was trying to do a sum of observations yij (observation i, replica j).
function [ yij ] = SPCmethod(yij,w)
sym n;
rep = 100;
for i = 1:w
yij(i) = mean (symsum(yij,i,1,rep))/rep
end

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采纳的回答

Veera Kanmani
Veera Kanmani 2018-3-29
First you need to
syms n
not sym n
  1 个评论
Walter Roberson
Walter Roberson 2018-3-29
That is not the problem, because they do not use n, so having an extra command equivalent to
sym('n');
will not cause any problems.

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