[R] Stacking of vectors to form a column vector

[Jim Lemon]

Hi Olufemi,
I sounds like you have a data frame (let's call it "mydata") with at
least three elements (columns). You may be trying to use c() in this
way:

y1to3<-c(y1,y2,y3)

in which case it won't work. However:

y1to3<-c(mydata$y1,mydata$y2,mydata$y3)

might do what you want, substituting whatever the name of your data
frame is for "mydata".

Jim


On Thu, Apr 30, 2015 at 1:20 PM, Jeff Newmiller
<jdnewmil at dcn.davis.ca.us> wrote:
> I am sure you can use c() because columns may be vectors even though vectors are not columns, but you really need to follow the posting guide and provide a reproducible example for us to show you how. You might find [1] helpful, in particular as it describes the use of the dput function to give us a few rows of your data.
>
> [1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
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> On April 29, 2015 7:48:24 PM PDT, Olufemi Bolarinwa <dafemlions at yahoo.co.uk> wrote:
>>Thank you Jeff for your response.
>>My y1, y2, y3 are actually 3 columns in the data so I cannot use the
>>c() function to concatenate them. I am confusing the "columns" with
>>vectors. I actually meant columns.
>>Any help will be much appreciated
>>Olufemi
>>
>>
>>
>>On Wednesday, 29 April 2015, 22:31, Jeff Newmiller
>><jdnewmil at dcn.davis.CA.us> wrote:
>>
>>
>>Vectors are not "columns" or "rows". Use the c() function to
>>concatenate vectors.
>>---------------------------------------------------------------------------
>>Jeff Newmiller                        The    .....      .....  Go
>>Live...
>>DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.      ##.#.  Live
>>Go...
>>                                      Live:  OO#.. Dead: OO#..  Playing
>>Research Engineer (Solar/Batteries            O.O#.      #.O#.  with
>>/Software/Embedded Controllers)              .OO#.      .OO#.
>>rocks...1k
>>---------------------------------------------------------------------------
>>
>>Sent from my phone. Please excuse my brevity.
>>
>>On April 29, 2015 6:56:46 PM PDT, Olufemi Bolarinwa
>><dafemlions at yahoo.co.uk> wrote:
>>>Hello,I am estimating a system of nonlinear equation where I need to
>>>stack my vector of y. I have data of about 6000units. I tried using
>>the
>>>rbind but instead of having a vector of 1 by 18000, it is giving me a
>>3
>>>by 6000 so that my matrix multiplication is non-conformable. The stack
>>>command requires an identifier but in this case, I do not have a
>>unique
>>>identifier.
>>>I would like to stack the the first 6000 units of y1 on the 2nd 6000
>>>units of y2 and 6000 units of y3.
>>>Any help will be greatly appreciated.
>>>ThanksOlufemi
>>>
>>>
>>>
>>>    [[alternative HTML version deleted]]
>>>
>>>______________________________________________
>>>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>>>PLEASE do read the posting guide
>>>http://www.R-project.org/posting-guide.html
>>>and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.