R help - Oct 2006 - Cross two dataframe

Dear r-users!

I would like to cross two data frame which have the same row number but 
different in the number of column. Can anybody help me for this case ?

Thanks a lot in advance

--------------------------------------------------------------------------------
  Majid Iravani
  PhD Student
  Swiss Federal Research Institute WSL
  Research Group of Vegetation Ecology
  Z?rcherstrasse 111  CH-8903 Birmensdorf  Switzerland
  Phone: +41-1-739-2693
  Fax: +41-1-739-2215
  Email: Majid.iravani at wsl.ch
http://www.wsl.ch/staff/majid.iravani/

Hi

try to:
1. read posting.guide
2. look into some introduction documents and FAQs
3. consult help
4. look to ?merge, ?cbind, ?rbind

HTH
Petr

On 12 Oct 2006 at 14:45, Majid Iravani wrote:

Date sent:      	Thu, 12 Oct 2006 14:45:19 +0200
To:             	r-help at stat.math.ethz.ch
From:           	Majid Iravani <majid.iravani at wsl.ch>
Subject:        	[R] Cross two dataframe
> 
> Dear r-users!
> 
> I would like to cross two data frame which have the same row number
> but different in the number of column. Can anybody help me for this
> case ?
> 
> Thanks a lot in advance
> 
> ----------------------------------------------------------------------
> ----------
>   Majid Iravani
>   PhD Student
>   Swiss Federal Research Institute WSL
>   Research Group of Vegetation Ecology
>   Z?rcherstrasse 111  CH-8903 Birmensdorf  Switzerland
>   Phone: +41-1-739-2693
>   Fax: +41-1-739-2215
>   Email: Majid.iravani at wsl.ch
> http://www.wsl.ch/staff/majid.iravani/
> 
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
Petr Pikal
petr.pikal at precheza.cz

I am unsure what you need, but try ?merge. If this isn't what you need, try
posting an example.

hth,
 
Mihai Nica
170 East Griffith St. G5
Jackson, MS 39201
601-914-0361

----- Original Message ----
From: Majid Iravani <majid.iravani@wsl.ch>
To: r-help@stat.math.ethz.ch
Sent: Thursday, October 12, 2006 7:45:19 AM
Subject: [R] Cross two dataframe


Dear r-users!

I would like to cross two data frame which have the same row number but 
different in the number of column. Can anybody help me for this case ?

Thanks a lot in advance

--------------------------------------------------------------------------------
  Majid Iravani
  PhD Student
  Swiss Federal Research Institute WSL
  Research Group of Vegetation Ecology
  Zürcherstrasse 111  CH-8903 Birmensdorf  Switzerland
  Phone: +41-1-739-2693
  Fax: +41-1-739-2215
  Email: Majid.iravani@wsl.ch
http://www.wsl.ch/staff/majid.iravani/

______________________________________________
R-help@stat.math.ethz.ch 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.







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Actually, I'm a beginner too :-) It's just this list is so helpful, and
I was helped so many times, that I am trying to bring my small contribution :-)
How about:

#_____________________________________________
Y1=X*Y[,1]
Y=cbind(Y,Y1)
Y

  site1 site2 site3 site4 site5 site6 site7 stage1 stage2 stage3
A     1     5     9    13    17    21    25      1      5      9
B     2     6    10    14    18    22    26      4     12     20
C     3     7    11    15    19    23    27      9     21     33
D     4     8    12    16    20    24    28     16     32     48
#_______________________________________________

And then change the names as you like... I bet there is a more elegant way, but
it seems to work :-)

hth,
 
Mihai Nica
170 East Griffith St. G5
Jackson, MS 39201
601-914-0361

----- Original Message ----
From: Majid Iravani <majid.iravani@wsl.ch>
To: Mihai Nica <mihainica@yahoo.com>
Sent: Friday, October 13, 2006 1:58:29 AM
Subject: Re: [R] Cross two dataframe

Dear Mihai Nica
Thanks. Actually I dont want to merge two data frames.
For example if I have two matrixes X and Yas follow:

X<- matrix(1:12, nrow=4, ncol=3,
dimnames=list(c("A","B","C","D"),
c("stage1","stage2","stage3")))

Y<- matrix(1:28, nrow=4, ncol=7,
dimnames=list(c("A","B","C","D"),
c("site1","site2","site3","site4","site5",
"site6","site7")))

  I would like to multiply first column of the Ymatrix (site1) to the all 
of the columns in Xmatrix. Then, the product will be three new columns 
(site1stage1, site1stage2 and site1stage3) which I want to add to Ymatrix. 
As my site (Y) dataset has about 400 columns its not easy to do it in Excel 
and Im looking for a command in R to prepare a new data frame for more 
analysis. So I would greatly appreciate if you help me in this case.
Thanks a lot again
Majid





At 10:06 AM 10/12/2006 -0700, you wrote:
>Mihai Nica
--------------------------------------------------------------------------------
  Majid Iravani
  PhD Student
  Swiss Federal Research Institute WSL
  Research Group of Vegetation Ecology
  Zürcherstrasse 111  CH-8903 Birmensdorf  Switzerland
  Phone: +41-1-739-2693
  Fax: +41-1-739-2215
  Email: Majid.iravani@wsl.ch
http://www.wsl.ch/staff/majid.iravani/
--------------------------------------------------------------------------------








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