def _pdf_w_mean(self, x, mean, sigma):
<EOL>mu, sigma = self.translate_args(mean, sigma)<EOL>return self.logpdf(x, mu, sigma)<EOL>
Calculates the pdf of a lognormal distribution with parameters mean
and sigma

Parameters
----------
mean : float or ndarray
    Mean of the lognormal distribution
sigma : float or ndarray
    Sigma parameter of the lognormal distribution

Returns
-------
: float or ndarray
    pdf of x