[R] Replace NAs in a range of data frame columns

Patrizio Frederic frederic.patrizio at gmail.com
Sun Dec 13 00:15:01 CET 2009


hi Michael,
the following code should work

b <- a[match('first',names(a)): match('last',names(a))]
b[is.na(b)]<-0
a[match('first',names(a)): match('last',names(a))] <- b

cheers,

Patrizio

2009/12/13 Michael Scharkow <michael at underused.org>:
> Dear all,
>
> I'm stuck in a seemingly trivial task that I need to perform for many
> datasets. Basically, I want to replace NA with 0 in a specified range of
> columns in a dataframe. I know the first and last column to be recoded only
> by its name.
>
> I can select the columns starting like this
> a[match('first',names(a)): match('last',names(a))]
>
> The question is how can replace all NA with 0 in this subset of the data?
>
> Thanks and greetings,
> Michael
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



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| Patrizio Frederic, PhD
| Assistant Professor,
| Department of Economics,
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|
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