thanks Michael.
I played with your suggestion to get the output in the format I wanted, and
I found the following that works fine:
sub<-d[, which(colnames(d) %in% v) ]
Aurelien
2011/12/2 R. Michael Weylandt <
michael.weyla...@gmail.com>
> How about this?
>
> d[, v[v %in% colnames(d)]]
>
> Mich
How about this?
d[, v[v %in% colnames(d)]]
Michael
On Dec 2, 2011, at 12:01 PM, Aurélien PHILIPPOT
wrote:
> Hi Paul and Jim,
> Thanks for your messages.
>
> I just wanted R to give me the columns of my data frame d, whose names
> appear in v. I do not care about the names of v that are not i
Hi Paul and Jim,
Thanks for your messages.
I just wanted R to give me the columns of my data frame d, whose names
appear in v. I do not care about the names of v that are not in d. In
addition, every time, there will be at least one element of v that has a
corresponding column in d, for sure, so I
On 12/02/2011 07:20 AM, Aurélien PHILIPPOT wrote:
> Dear R-users,
> -I am new to R, and I am struggling with the following problem.
>
> -I am repeating the following operations hundreds of times, within a loop:
> I want to subset a data frame by columns. I am interested in the columns
> names that
?try
If you know that you might have a problem with undefined columns, or whatever,
then trap the error with 'try' so your program can recover. You could also
validate the data that you are going to use before entering the loop; standard
defensive programming - errors are always going to happe
Dear R-users,
-I am new to R, and I am struggling with the following problem.
-I am repeating the following operations hundreds of times, within a loop:
I want to subset a data frame by columns. I am interested in the columns
names that are given by the rows of another data frame that was built i
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