[R] setting search position

[Turner, Jason]

I'm building a library of spectral analysis routines, and have a question.  
A few functions I've written work just like existing ts library routines,
with
added functionality.  I thought a handy way to set this up would be to set
my library ("spectral") before ts on the search path.  Is there an elegant
way to guarantee this?  e.g. if require(ts) is in .First.lib, and ts is not
currently
loaded, ts will be put before spectral on the search path.

Is this a good idea (deliberate masking), or is it too underhanded?

Regards

Jason

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