Dear R users: I have a question regarding the output for two of the functions in the `sn' package, which deals with the mle fitting of skew normal curves to linear regressions. I'm using the examples and the dataset given as an example in the online documentation for this package, for the functions `msn.fit' and `msn.mle'. I'm following the example code in the documentation for these two functions exactly. Part of the data output is supposed to be "se", which gives the standard errors of the estimated coefficients. This particular value comes out as being "NA" in the examples given, but there are three coefficients in each case and no numerical problems about why the standard errors cannot be calculated. Am I setting this program up right? Is there some other command I should use (or an option I need to use) to get the output to display standard errors of the coefficients? Thank you for your time in reading this question - Cordially, Manasi
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