Incidentially, my attempt to replace . with NA doesn't seem to work--getting this outpu: name=Guinea-Bissau lifeex76=. urpop76=20.8 indeat70=173 _ERROR_=1 _N_=21 NOTE: Invalid numeric data, 'NA' , at line 175 column 32. name=Swaziland lifeex76=. urpop76=14 indeat70=147 _ERROR_=1 _N_=43 NOTE: Invalid numeric data, 'NA' , at line 175 column 32. name=Barbados lifeex76=. urpop76=38.6 indeat70=33 _ERROR_=1 _N_=51 NOTE: Invalid numeric data, 'NA' , at line 175 column 32. name=Guyana lifeex76=. urpop76=29.6 indeat70=56 _ERROR_=1 _N_=72 NOTE: Invalid numeric data, 'NA' , at line 175 column 32. name=Suriname lifeex76=. urpop76=44.8 indeat70=55 _ERROR_=1 _N_=75 Any suggestions? Thanks!
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