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Possible Duplicate:
R Grouping functions: sapply vs. lapply vs. apply. vs. tapply vs. by vs. aggregate vs.

R's apply functions family is very handy. Almost everyday I come across new member of apply functions family. Today I came to know eapply through this answer. I'd like to make a list of available apply functions family. I'd appreciate if you come up with some apply functions family members with their description and possible example. Thanks in advance.

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MYaseen208
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    I wrote something like what you describe for many of the base apply family of functions [here](http://stackoverflow.com/questions/3505701/r-grouping-functions-sapply-vs-lapply-vs-apply-vs-tapply-vs-by-vs-aggregat/7141669#7141669). – joran Sep 14 '11 at 02:49
  • @ Joran: Nice answer and good collection. Thanks for pointing out. – MYaseen208 Sep 14 '11 at 02:58
  • @joran. Nice list. +10. Will probably recommend it in the future. You might consider expanding the `sapply` entry since you can expect matrices or arrays when multiple grouping factors are used. – IRTFM Sep 14 '11 at 03:34

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