Stacking of vectors to form a column vector
... and if this is what is wanted, somewhat cleaner and more generalizable for programming would be: do.call(c, mydata[,1:3]) ## where the column indices might have to be adjusted to get the desired columns. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll
On Wed, Apr 29, 2015 at 11:51 PM, Jim Lemon <drjimlemon at gmail.com> wrote:
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 --------------------------------------------------------------------------- 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 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]]
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______________________________________________ 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.
______________________________________________ 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.