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Unexpected matlab operator Covariance

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curoi
curoi 2013-4-6
I'm trying to calculate the the covariance of a set of data using stats::covariance but I keep getting an error message saying 'Unexpected Matlab operator'. The code I used was:
stats::covariance([1, 2, 6, 9],[5, 9, 3, 7], Population])
I don't see the error in the code. Is there is another way of calculating the covariance?

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Walter Roberson
Walter Roberson 2013-4-6
stats::covariance is a MuPAD routine that cannot be called directly from MATLAB. Use
feval(symengine, 'stats::covariance', [1, 2, 6, 9], [6, 9, 3, 7], Population)
  2 个评论
curoi
curoi 2013-9-9
When I do this, I get
Undefined function or variable 'Population'
Walter Roberson
Walter Roberson 2013-9-9
Ah, it is a keyword for that MuPAD call, not a variable you are passing in.
Try these two variations:
feval(symengine, 'stats::covariance', [1, 2, 6, 9], [6, 9, 3, 7], 'Population')
feval(symengine, 'stats::covariance', [1, 2, 6, 9], [6, 9, 3, 7], sym('Population'))

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