[R] how to ignore t.test error message

[burak kutlu]

Hi 
Although t.test does not give an error with
t.test(c(0, 0), c(0, 0));

if you try doing that with any number other than 0, 

> t.test(c(1,1),c(1,1))

(R gives the following error)


Error in t.test.default(c(1, 1), c(1, 1)) : 
	data are essentially constant

The logic in insisting is that my data has different
columns, and I'd like to tolerate if in one of the
columns, the data fail to pass the t.test.

Thanks
Burak

--- Uwe Ligges <ligges at statistik.uni-dortmund.de>
wrote:

> burak kutlu wrote:
> > Hello,
> > I was wondering if there is a way to ignore the
> error
> > message you get when some of the data means you
> > compare are constant in some lines of your data
> frame.
> 
> What does the error message say exactly?
> Do you have an example?
> 
> Even with the degenerated case
>    t.test(c(0, 0), c(0, 0))
> I don't get any error message.
> 
> 
> > I'd like to go ahead with t.test 
> 
> See ?try
> 
> > and get the calculated p-values anyway in such a
> case.
> 
> And what is the p-value in such a case?
> 
> I guess I haven't understood the problem correctly,
> so please be more 
> specific!
> 
> Uwe Ligges
> 
> 
> > Thanks
> > -burak
> > 
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