Description Usage Arguments Details Value Author(s) References See Also Examples
Verify that each element contains only letters.
| 1 | 
| x | character | 
| ... | ignored | 
Verifies that each element in x contains only 
upper or lower case letters.
logical
Tim Bergsma
http://metrumrg.googlecode.com
is.latex.token
| 1 | 
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