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I installed the stringr package on my Ubuntu 10.04 machine under R 2.10.1. When I try to use the str_extract() function R stops and gives the following error message:
Error in recyclable(string, pattern, replacement) :
could not find function “vapply”
How can I solve this problem? Is there any specific package that contains this vapply function?
vapplyis in the base package, so something may be wrong with your installation.