Fisher Information can be calculated using the covariance of score function. For logistic regression the log-likelihood is taken to obtain the score function which is
YX - PX // Y-class X-record P-htheta
On computing the result of this I get a 1xn matrix. And I am confused how to calculate the covariance of this score function. I know how generally a covariance matrix is calculated but I am stuck with this 1xn. Please help.