R help - May 2003 - missing values

Dear list members,

 

I'm relatively new to this list; can anyone tell me how to declare
missing values once a dataset has been attached?

For example here:

 

   VAR1

1     1

2     2

3     1

4     3

5     2

6     1

7     3

8     3

9     1

10    2

11   98

12    2

13   97

14   99

15   NA

16    3

 

I would like values 97, 98 and 99 to be treated as missing values.

I read everything about is.na but I just can't figure out how to do it. 

 

Many thanks,

Adrian

 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Adrian Dusa (adi@roda.ro)
Romanian Social Data Archive (www.roda.ro)
1, Schitu Magureanu Bd.
76625 Bucharest sector 5
Romania
Tel./Fax: +40 (21) 312.66.18

 


	[[alternate HTML version deleted]]

VAR1[c(11, 13, 14)] <- NA

Is this what you what?
hth.  spencer graves

Adrian Dusa wrote:
> Dear list members,
> 
>  
> 
> I'm relatively new to this list; can anyone tell me how to declare
> missing values once a dataset has been attached?
> 
> For example here:
> 
>  
> 
>    VAR1
> 
> 1     1
> 
> 2     2
> 
> 3     1
> 
> 4     3
> 
> 5     2
> 
> 6     1
> 
> 7     3
> 
> 8     3
> 
> 9     1
> 
> 10    2
> 
> 11   98
> 
> 12    2
> 
> 13   97
> 
> 14   99
> 
> 15   NA
> 
> 16    3
> 
>  
> 
> I would like values 97, 98 and 99 to be treated as missing values.
> 
> I read everything about is.na but I just can't figure out how to do it.
> 
>  
> 
> Many thanks,
> 
> Adrian
> 
>  
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Adrian Dusa (adi at roda.ro)
> Romanian Social Data Archive (www.roda.ro)
> 1, Schitu Magureanu Bd.
> 76625 Bucharest sector 5
> Romania
> Tel./Fax: +40 (21) 312.66.18
> 
>  
> 
> 
> 	[[alternate HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help

On Wed, 28 May 2003, Adrian Dusa wrote:
>
>
> I would like values 97, 98 and 99 to be treated as missing values.
>
VAR1[VAR1 %in% c(97,98,99)]<-NA

	-thomas