[R] how to create a new column from two columns with conditions

Wed Apr 29 21:30:45 CEST 2020

If you don't mind using tidyverse, you can do this easily with if_else.

b$PHENO<-if_else(...

On Wed, Apr 29, 2020 at 3:21 PM Ana Marija <sokovic.anamarija using gmail.com>
wrote:

> Hello,
>
> I have a data frame like this:
>
> > head(b)
>        FID          IID FLASER PLASER
> 1: fam1000 G1000      1      1
> 2: fam1001 G1001      1      1
> 3: fam1003 G1003      1      2
> 4: fam1005 G1005      1      1
> 5: fam1009 G1009      2      1
> 6: fam1052 G1052      1      1
> ...
>
> My conditions for creating a new column PHENO would be this:
>
> if FLASER or PLASER =2 then PHENO=2
> otherwise PHENO=1
>
> so result would look like this:
>
> > head(b)
>        FID          IID FLASER PLASER PHENO
> 1: fam1000 G1000      1      1            1
> 2: fam1001 G1001      1      1            1
> 3: fam1003 G1003      1      2            2
> 4: fam1005 G1005      1      1            1
> 5: fam1009 G1009      2      1             2
> 6: fam1052 G1052      1      1             1
> ...
>
> Thanks
> Ana
> ...
>
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-- 
Patrick S. Malone, Ph.D., Malone Quantitative
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