[R] Self-starting nls functions

[Philippe Grosjean]

Hello,

I am doing several self-starting growth functions for using with nls(). When
I list the self-starting functions included in nls library, for instance,
SSlogis, there is:

> SSlogis
function (input, Asym, xmid, scal)
...
<environment: 03476D20>
attr(,"class")
[1] "selfStart"

What is this <environment: 03476D20> instruction?
By using deriv() and then Selfstart(), I don't get this, although everything
works fine without it.
Thanks for help.
Best Regards,

Philippe Grosjean

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