Re: [R] multiple csv files for T-test

HI, According to ?t.test() documentation If ‘paired’ is ‘TRUE’ then both ‘x’ and ‘y’ must be specified and they must be the same length.  Missing values are silently removed (in pairs if ‘paired’ is ‘TRUE’) #Example with missing values set.seed(24) dat1<- as.data.frame(matrix(sample(c(NA

Re: [R] multiple csv files for T-test

Hi, I used as.data.frame(matrix(...)) just to create an example dataset.  In your case, you don't need to do that.  Using the same example: set.seed(24) dat1<- as.data.frame(matrix(sample(20:40,40,replace=TRUE),ncol=4)) set.seed(285) dat2<- as.data.frame(matrix(sample(35:60,40,replace=TRUE),ncol=

Re: [R] multiple csv files for T-test

Hi, May be this helps: #You can use ?read.csv() to read the two files. set.seed(24) dat1<- as.data.frame(matrix(sample(20:40,40,replace=TRUE),ncol=4)) set.seed(285) dat2<- as.data.frame(matrix(sample(35:60,40,replace=TRUE),ncol=4)) sapply(colnames(dat1),function(i) t.test(dat1[,i],dat2[,i],paired=