> myData[myData$var1==5;"var1"]<-NA # recode value "5" into "NA"
try
myData[!is.na(myData$var1) & myData$var1==5;"var1"]<-NA
or, more simply,
myData$var1[myData$var1==5]<-NA
***
This email and any attachments are confid
1. Some data structured the way you are using would have been helpful.
I used Tal Galil's play data and set up a dataframe with the variable names you
are using:
structure(list(var1 = c(1, NA, NA, 4, 5, 6, 7, 8, 9, 10, 5),
var2 = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 5)), .Names = c("var1",
"var2
Le jeudi 12 avril 2012 à 11:08 +0200, David Studer a écrit :
> Hello everybody,
>
> I know this is pretty basic stuff, but could anyone explain me how to
> recode a single value of a variable
> into a missing value?
>
> I used to do it like this:
>
> myData[myData$var1==5;"var1"]<-NA
Le jeudi 12 avril 2012 à 12:29 +0300, Tal Galili a écrit :
> Hi David,
> You bring up a good question. I am not sure what is the "right" way to
> solve it. But here is a simple solution I put together:
>
> x = c(1:10,5)
> y = x
> x[c(2,3)] <- NA
>
> # reproducing the problem:
> y[x==5]
>
> na2
Hi David,
You bring up a good question. I am not sure what is the "right" way to
solve it. But here is a simple solution I put together:
x = c(1:10,5)
y = x
x[c(2,3)] <- NA
# reproducing the problem:
y[x==5]
na2F <- function(x) {
x2 <- x
x2[is.na(x)] <- F
x2
}
na2F(x==5)
# "solved
Hello everybody,
I know this is pretty basic stuff, but could anyone explain me how to
recode a single value of a variable
into a missing value?
I used to do it like this:
myData[myData$var1==5;"var1"]<-NA # recode value "5" into "NA"
But the column "var1" already contains NAs, whic
Hi:
Here are several equivalent ways to produce your desired output:
# Base package: transform()
df <- transform(df, mean = ave(x, id, FUN = mean))
# plyr package
library('plyr')
ddply(df, .(id), transform, mean = mean(x))
# data.table package
library('data.table')
dt <- data.table(df, key = '
?aggregate
aggregate(X~ID, your.data.frame.goes.here, "mean")
Mikhail
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On
> Behalf Of Julia Moeller
> Sent: Friday, August 12, 2011 10:10 AM
> To: r-help@r-project.
Hi,
as an R-beginner, I have a recoding problem and hope you can help me:
I am working on a SPSS dataset, which I loaded into R (load("C:/...)
I have 2 existing Variables: "ID" and "X" ,
and one variable to be computed: meanX.dependID (=mean of X for all rows
in which ID has the same value)
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