R help - Aug 2012 - Help on merging without a common variable

Dear All,
I want to create a dataset for a NONMEM simulation. I have a dataframe with
individual PK parameters and want to create a dosing sceinario in a second
dataframe.  I want to merge them both so that every individiual's PK
parameters are combined with the dosing scenario into one.  I do not have a
common variable to merge and cbind is giving error that lengths are
different.  I appreciate your help.

Regards
Ayyappa

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You can merge without a common variable:

x <- data.frame(x = 1:5)
y <- data.frame(y = 6:10)

merge(x,y)

works just fine (for one set of expectations)

If you need more help, please do make a reproducible example (as
requested of all R-help posts): the instructions here might help

http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

Best,
Michael

On Thu, Aug 2, 2012 at 4:03 PM, Ayyappa Chaturvedula
<ayyappach at gmail.com> wrote:
> Dear All,
> I want to create a dataset for a NONMEM simulation. I have a dataframe with
> individual PK parameters and want to create a dosing sceinario in a second
> dataframe.  I want to merge them both so that every individiual's PK
> parameters are combined with the dosing scenario into one.  I do not have a
> common variable to merge and cbind is giving error that lengths are
> different.  I appreciate your help.
>
> Regards
> Ayyappa
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On Thu, Aug 2, 2012 at 4:52 PM, Ayyappa Chaturvedula
<ayyappach at gmail.com> wrote:
> Michael,
> Thank  you for this , it worked.  I was thinking "by" is a
required argument
> in merge function.
>
Well, it is "required" in a strict sense, but it has a default value
(defaulting to the shared names) so _you_ don't have to specify it.

Best,
Michael
> Regards,
> Ayyappa
>