Yao, Minghua wrote:
Hello, everyone,
I don't quite understand the following message:
TTT <- t.test(1:10, y=c(7:20)) class(TTT)
[1] "htest"
[EMAIL PROTECTED]
Error: Trying to get slot "p.value" from an object whose class ("htest") is not defined
TTT$p.value
[1] 1.855282e-05
Why the message says the class of TTT is not defined while class(TTT) gets "htest"?
I appreciate the explanations?
Well, you are mixing S3 with S4 classes. The slot extractor "@" epects an S4 class. And htest is an S3 class ....
Uwe Ligges
-Minghua
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