[R] Errors in if statement

David Winsemius dwinsemius at comcast.net
Sat Sep 29 04:39:13 CEST 2012


On Sep 28, 2012, at 1:16 PM, JiangZhengyu wrote:

> 
> Hi guys, I have many rows (>1000) and columns (>30) of "geno" matrix. I use the following loop and condition statement (adapted from someone else code). I always have an error below.  I was wondering if anyone knows what's the problem & how to fix it.  

Boy, it surely looks like missing values are the problem. Have you read:

?sum

-- 
David.

> Thanks,Zhengyu  ########### geno matrix P1  P2  P3  P4 
> 1  2  2  3 2     
> 2  2  2  1 1
> 1  2  1  2  NANA 2  3  4  5 ###########
> for(i in 1:4) {
> cat(i,"")
> if(sum(geno[i,]!=2)>3 && sum(geno[i,]==1)>=1 && sum(geno[i,]==3)>=1){
>   tmp = 1
>   }
> } ########### 1 2 Error in if (sum(geno[i, ] != 2) > 3 && sum(geno[i, ] == 1) >= 1 && sum(geno[i,  : 
>  missing value where TRUE/FALSE needed
>       		 	   		  
> 	[[alternative HTML version deleted]]

David Winsemius, MD
Alameda, CA, USA




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