On Wed, 25 Feb 2009, Kenneth Knoblauch wrote:
Hi
Quoting Prof Brian Ripley <rip...@stats.ox.ac.uk>:
On Wed, 25 Feb 2009, Heather Turner wrote:
This post about length 1 offsets on R help seems to have been ignored
(sorry deleted original email - is there a way to continue thread in
this case?)
https://stat.ethz.ch/pipermail/r-help/2009-February/189352.html
So let's be clear: this was the 'offset' argument' and not the offset()
function as you refer to below.
It occurs for both
Yes (I knew). but no one (AFAICS) said the function allows length-1
arguments: Heather is raising the possibility that it should as new
functionality, I believe.
c1 <- structure(list(Contr = c(0.028, 0.043, 0.064, 0.097, 0.146, 0.219
), Correct = c(34L, 57L, 94L, 152L, 160L, 160L), Incorrect = c(126L,
103L, 66L, 8L, 0L, 0L)), .Names = c("Contr", "Correct", "Incorrect"
), row.names = c(NA, 6L), class = "data.frame")
glm(cbind(Correct, Incorrect) ~ Contr + offset(qlogis(0.25)) - 1, binomial,
data = c1)
Error in model.frame.default(formula = cbind(Correct, Incorrect) ~ Contr + :
variable lengths differ (found for 'offset(qlogis(0.25))')
+
Thanks for looking into this when time permits.
Ken
--- remaining deleted
--
Ken Knoblauch
Inserm U846
Stem-cell and Brain Research Institute
Department of Integrative Neurosciences
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--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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