On Jul 7, 2011, at 8:47 PM, Gang Chen wrote:
I define the following function to convert a t-value with degrees of
freedom
DF to another t-value with different degrees of freedom fullDF:
tConvert - function(tval, DF, fullDF) ifelse(DF=1, qt(pt(tval, DF),
fullDF), 0)
It works as expected
I define the following function to convert a t-value with degrees of freedom
DF to another t-value with different degrees of freedom fullDF:
tConvert - function(tval, DF, fullDF) ifelse(DF=1, qt(pt(tval, DF),
fullDF), 0)
It works as expected with the following case:
tConvert(c(2,3), c(10,12),
On Jul 7, 2011, at 8:52 PM, David Winsemius wrote:
On Jul 7, 2011, at 8:47 PM, Gang Chen wrote:
I define the following function to convert a t-value with degrees
of freedom
DF to another t-value with different degrees of freedom fullDF:
tConvert - function(tval, DF, fullDF) ifelse(DF=1,
Thanks for the help! Are you sure R version plays a role in this case? My R
version is 2.13.0
Your suggestion prompted me to look into the help content of ifelse, and a
similar example exists there:
x - c(6:-4)
sqrt(x) #- gives warning
sqrt(ifelse(x = 0, x, NA)) # no warning
On Jul 7, 2011, at 10:17 PM, Gang Chen wrote:
Thanks for the help! Are you sure R version plays a role in this
case? My R version is 2.13.0
I'm not sure, but my version is 2.13.1
Your suggestion prompted me to look into the help content of ifelse,
and a similar example exists there:
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