Odp: How to replace all <NA> values in a data.frame with another ( not 0) value

Hi

r-help-bounces at r-project.org napsal dne 04.05.2010 14:54:14:

I need to replace <NA> occurrences in multiple columns  in a data.frame 
with "000/000"

Be careful if you replace NA in numeric columns.

str(test)

'data.frame':   10 obs. of  3 variables:
 $ mp: num  20.9 19.9 20.1 20.2 18.9 ...
 $ so: num  18.8 18.6 18.2 17.9 18.1 ...
 $ le: num  48 49.1 48.8 42.6 46.1 ...

test[2,2] <- NA
test[is.na(test)] <- "000/000"
str(test)

'data.frame':   10 obs. of  3 variables:
 $ mp: num  20.9 19.9 20.1 20.2 18.9 ...
 $ so: chr  "18.75" "000/000" "18.25" "17.89" ...
 $ le: num  48 49.1 48.8 42.6 46.1 ...

numeric column is now character and you can not use it for further 
analysis without some fiddling around.

Regards
Petr

how do I achieve this?

Thanks

Nevil Amos

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