mathijsdevaan wrote on 12/09/2010 04:21:54 PM:
> I have two columns with data (both identifiers - it's an affiliation
list)
> and I would like to delete the rows in which the observations in the
second
> column have a frequency < 5 in the entire second column. Example:
>
> 1 a
> 1 b
> 1
Hi Phil,
That worked perfectly! Thanks
Mathijs
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R-help@r-project.
Suppose this is your data frame:
df = data.frame(x=c(1,1,1,2,2,2),y=c('a','b','c','a','b','d'))
df
x y
1 1 a
2 1 b
3 1 c
4 2 a
5 2 b
6 2 d
df[!table(df$y)[df$y] < 2,]
x y
1 1 a
2 1 b
4 2 a
5 2 b
Note that this will only work properly if y is a factor or character
variable. If y was num
Hi,
I have two columns with data (both identifiers - it's an affiliation list)
and I would like to delete the rows in which the observations in the second
column have a frequency < 5 in the entire second column. Example:
1 a
1 b
1 c
2 a
2 b
2 d
Let's say, I would like to
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