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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