Hi,
I got two questions :
1st Question
         a=S
         b=data.frame(S=3)
         do.call(`-`,list(do.call(`$`,list(b,S)),5))
= How can I put new values on S column having the column name as a variable ?
2 nd Question
      a=S
    Â
Hi,
On Fri, Sep 10, 2010 at 4:05 AM, omerle ome...@laposte.net wrote:
Hi,
I got two questions :
1st Question
a=S
b=data.frame(S=3)
do.call(`-`,list(do.call(`$`,list(b,S)),5))
I think there is some confusion here. Why are you setting a equal to
S but
Message du 10/09/10 14:53
De : Ista Zahn
A : omerle
Copie à : r-help@r-project.org
Objet : Re: [R] Data.frames : difference between x$a and x[, a] ? - How set
new values on x$a with a as variable ?
Hi,
On Fri, Sep 10, 2010 at 4:05 AM, omerle wrote:
Hi,
I got two questions :
On Fri, Sep 10, 2010 at 9:22 AM, omerle ome...@laposte.net wrote:
Message du 10/09/10 14:53
De : Ista Zahn
A : omerle
Copie à : r-help@r-project.org
Objet : Re: [R] Data.frames : difference between x$a and x[, a] ? - How
set new values on x$a with a as variable ?
Hi,
On Fri, Sep 10,
I'm having trouble parsing this. What exactly do you want to do?
1 - Put a list as an element of a data.frame. That's quite convenient for my
pricing function.
I think this is a really bad idea. data.frames are not meant to be
used in this way. Why not use a list of lists?
It can be very
Le 9/10/2010 15:37, Ista Zahn a écrit :
On Fri, Sep 10, 2010 at 9:22 AM, omerleome...@laposte.net wrote:
Message du 10/09/10 14:53
De : Ista Zahn
A : omerle
Copie à : r-help@r-project.org
Objet : Re: [R] Data.frames : difference between x$a and x[, a] ? - How
set new values on x$a with
On Sep 10, 2010, at 9:42 AM, Hadley Wickham wrote:
I'm having trouble parsing this. What exactly do you want to do?
1 - Put a list as an element of a data.frame. That's quite
convenient for my pricing function.
I think this is a really bad idea. data.frames are not meant to be
used in this
I think this is a really bad idea. data.frames are not meant to be
used in this way. Why not use a list of lists?
It can be very convenient, but I suspect the original poster is
confused about the different between vectors and lists.
I wouldn't be surprised if someone were confused, since
Well, let's see if the following helps or just adds to the confusion.
First lists are vectors of mode list . But they are general
recursive structures (in fact, completely general).
Second, data frames are lists: each column of a data frame is a
component (member) of the list with the additional
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