Hi I am implementing the t.test in a loop and where the data is the same i get
an error message.
Error in t.test.default(Samp3, Samp1, na.rm = TRUE, var.equal = FALSE, :
data are essentially constant
The script i am using is
for (i in 1:length(zz[,1])) {
Samp1 <- zz[i,2:17]
Samp2 <- zz[i,18:33]
Samp3 <- zz[i,34:47]
Samp4 <- zz[i,48:63]
TTestResult[i,2] <- t.test(Samp2, Samp1, na.rm=TRUE, var.equal = FALSE,
paired=FALSE, conf.level=0.95)$p.value
TTestResult[i,3] <- t.test(Samp3, Samp1, na.rm=TRUE, var.equal = FALSE,
paired=FALSE, conf.level=0.95)$p.value
TTestResult[i,4] <- t.test(Samp4, Samp1, na.rm=TRUE, var.equal = FALSE,
paired=FALSE, conf.level=0.95)$p.value
}
Is there a way to make my loop ignore this problem and go onto the next
iteration
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