Unexpected matlab operator Covariance

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?

Answer 1

[Walter Roberson]

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)

[curoi]

When I do this, I get

Undefined function or variable 'Population'

[Walter Roberson]

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'))