[R] how to extract characters from a character string

From: Weidong Gu <wgu_at_uab.edu>
Date: Fri, 8 Feb 2008 14:36:52 -0600


Hi, I ran into a problem when I complied a dataset with UTM coordinates. For calculating distances between sites, I need to reformat the coordinates from, for example,  

32?35.421 N, to 35.421, i.e. I need to delete all digits before symbol ? and a space and N at the end of the string. What functions I should use?  

Thanks in advance.    

Weidong Gu,

Department of Medicine
University of Alabama, Birmingham  

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