Jorge Ivan Velez wrote:
Dear Seung,
Try this:
Names <- letters[1:5]
Names
[1] "a" "b" "c" "d" "e"
apply(t(combn(Names,2)), 1, paste, collapse="")
[1] "ab" "ac" "ad" "ae" "bc" "bd" "be" "cd" "ce" "de"
another option is to use the 'FUN' argument of combn(), e.g.,
combn(Names, 2, FUN = paste, collapse = "")
Best,
Dimitris
HTH,
Jorge
On Fri, May 1, 2009 at 2:55 PM, SEUNG CHEON HONG
<s...@entomology.wisc.edu>wrote:
Dear R-list,
Is there any way I can extract part or whole column name from two
variables and combine them? Not values, but column names.
For example,
I have data set with 70 variables. The column names are "Alfalfa",
"Corn","Soybean",..."Sunflower". After I combine the two variable (say
Alfalfa and Corn), I want to rename it as "AlfCor" or "AlfalfaCorn"
automatically not manually.
In excel, I found the function combining two texts in individual
columns using (=A1&B1, if you want to combine texts in the two cells.).
Thank you very much in advance!
Steve Hong
437 RUSSELL LAB.
1630 LINDEN DR.
ENTOMOLOGY DEPT.
MADISON, WI, 53706
Tel: 608-263-0964
Fax: 608-262-3322
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
