[R] t-test confidence interval

[Ben Bolker]

Kemp S E (Comp <sekemp <at> glam.ac.uk> writes:

> 
> Hi,
> 
> Does anyone know of a pre-existing function where I can get the t-test
> confidence interval for a given mean, sd, degrees of freedom and
> confidence limit.
> 
> I do NOT want to run any data through the t.test function.
> 
> Kind regards,
> 
> Sam.

  how about 

mean+c(-1,1)*sd*qt(1-alpha/2,df)

?