Hi,
If my data frame "df" has a index "type", I want to get a subset such
that the type belongs to a "type_list";
using sql, I want
SELECT name, type FROM df
WHERE type in type_list;
Now in R I have to write a loop like
mysubset<- df [ df$type == type_list[1], ]
for (type1 in type_list[ 2: length (type_list) ] ) {
mysubset<-cbind (mysubset, df [ df$type == type1, ])
}
What is the natural way of doing this in R? Is it possible to use
subset() to attain this?
Thanks!
Best,
Reeyarn
On Fri, Dec 3, 2010 at 11:26 AM, William Dunlap <[hidden email]> wrote:
> HI,
> I have a dataframe like this:
> name type
> A t1
> B t2
> C t1
> D t4
> E t3
> F t2
> how can I have a "sub dataframe" based with the column "type" like this:
> (for type = t1)
> name type
> A t1
> C t1
> D t1
Hi,
Let's say your data.frame is stored in a variable named "df":
R> subset(df, type == 't1')
Read the help files:
R> ?subset
Also take a look at ?split
-steve
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