[R] conditional data replace (recode, change or whatsoever)

[Romain DOUMENC]

Please do your homework before asking the list:
An introduction to R, chapter 7

Am 03.08.2011 10:05, schrieb zcatav:
> Hello,
> I have a big data.frame, a piece of it as follows.
> 
>  	a	        b		        c	    d
> 1	58009	2010-11-02	0	    NA
> 2	114761	NA		        1	    2008-11-05
> 3	184440	NA		        1	    2009-12-08
> 4	189372	NA		        0	    NA
> 5	105286	NA		        0	    NA
> 6	186717	NA		        0	    NA
> 7	189106	NA		        0	    NA
> 8	127306	NA		        0	    NA
> 9	157342	2011-04-25	0	    NA
> 
> I want to replace b[NA] values with "20011-07-28" where c==0. I use rstudio
> and i'm a novice.
> 
> 
> --
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