[R] coercing "numeric" components of data frame to "factor" or "ordered"?

[Russell Senior]

I am getting ready to load a bunch of data into R.  The data is all
numeric, but some of the numbers are integer codes representing
non-numeric semantics.  What is the best way to "fix" the data frames
so that these compenents are recognized as "factors" or "ordered", as
appropriate?

Can I "assign" to some attribute of the data frame component, like the
"class" or "levels" to get the desired effect?

Thanks!

-- 
Russell Senior         ``The two chiefs turned to each other.        
seniorr at aracnet.com      Bellison uncorked a flood of horrible       
                         profanity, which, translated meant, `This is
                         extremely unusual.' ''                      
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