R help - Apr 2011 - usage of dsstd function in fGarch package

Good afternoon,

I have a question about the use of the dsstd() function;

The documentation provides an example:

dsstd(x, mean = 0, sd = 1, nu = 5, xi = 1.5)

where:

mean, sd, nu, xi are the location parameter mean, scale parameter sd, shape
parameter nu, skewness parameter xi

Skewness can be <0, but if you put in a negative value for xi, the function
returns an array of negative y's, which doesn't seem to be correct.

Am I misusing this function?

Regards,
James

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