[R] Change in how R handles assignments?

[David Kreil]

Dear R-users and experts,

I have been using the following code in earlier versions of R:

  q[,names(info)]<-info[no,];

with

> class(info)
[1] "data.frame"
> class(q)
[1] "data.frame"
> dim(q)
[1] 7488   68
> dim(info)
[1] 12  8
> dim(info[no,])
[1] 1 8

The column names(info) did not exist in q before the assignment.

What used to happen (as intended) was that they would be created, and each of 
the 7488 rows would be set the same value, info[no,].

Now, in the current version of R this gives the error:

Error in "[[<-.data.frame"(`*tmp*`, k, value = rep(value[[k]], len = n)) : 
	replacement has 7488 rows, data has 1

I can use the following as a workaround

    for (n in names(info))
      q[,n]<-info[no,n];

but it seems clunky. Is there a more elegant/simple way to do the same thing 
in the current version of R? It seems I'm unintentionally forcing it to do 
something it doesn't "like".

Comments much appreciated.

Best regards,

David.


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Dr David Philip Kreil                 ("`-''-/").___..--''"`-._
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