?ifelse this is vectorized 'if' only handles single values testY2$redgroups <- ifelse(testY2$redgroups > 17, 17, testY2$redgroups)
On Sun, Apr 24, 2011 at 4:10 PM, Sparks, John James <jspa...@uic.edu> wrote: > Dear R Helpers, > > I have another one of those problems involving a very simple step, but due > to my inexperience I can't find a way to solve it. I had a look at a > number of on-line references, but they don't speak to this problem. > > I have a variable with 20 values > >> table (testY2$redgroups) > > 1 2 3 4 5 6 7 8 9 10 11 12 > 13 14 15 16 17 18 19 20 > 69 734 6079 18578 13693 6412 3548 1646 659 323 129 88 > 90 40 57 33 36 17 6 13 > > Values 18,19 and 20 have small counts. So, I want to set the value of > redgroups for these rows to 17 in order to combine groups. I would think > that it would be as easy as > > if(testY2$redgroups>17) testY2$redgroups<-17 > > following the syntax that I have seen in the manuals. However, I get the > error message > > Warning message: > In if (testY2$redgroups > 17) testY2$redgroups <- 17 : > the condition has length > 1 and only the first element will be used > > Can someone please tell me the correct syntax for this? I would really > appreciate it. > > Appreciatively yours, > --John J. Sparks, Ph.D. > > ______________________________________________ > R-help@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. > -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? ______________________________________________ R-help@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.
