[R] factorizing many columns of a dataframe

[ronggui]

data frame is a special list.so you can use lapply to do it.

======= 2005-10-23 08:54:42 ÄúÔÚÀ´ÐÅÖÐÐ´µÀ£º=======

>Hi guys,
> 
>I have a large number of columns of a dataframe that I want to apply a common factorization to; the columns are all numeric and the factorization collapses some of these values into common groups (labels). How can I do this systematically?
>Is there an analog to sapply that can pass columns as vectors to FUN?
> 
>Thanks in advance,
>Gregory Gentlemen
>
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2005-10-23

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Deparment of Sociology
Fudan University

My new mail addres is ronggui.huang at gmail.com
Blog:http://sociology.yculblog.com