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authorranke <ranke@d1b72e20-2ee0-0310-a1c4-ad5adbbefcdc>2006-05-03 22:53:31 +0000
committerranke <ranke@d1b72e20-2ee0-0310-a1c4-ad5adbbefcdc>2006-05-03 22:53:31 +0000
commit2cf977cb94fcf6e68b4a75cdf33a29a5308b9457 (patch)
treec82b096ba83b4c19d5ec0b0a1012e0100ca867fb /man/drfit.Rd
parent8eea91d691ee60f0ce5bd3560f2e4b7e5820556a (diff)
Changed the way confidence intervals are being calculated. Now
the function confint.nls from the MASS package is being used, after stumbling across the relevant paragraph of the MASS book. git-svn-id: http://kriemhild.uft.uni-bremen.de/svn/drfit@76 d1b72e20-2ee0-0310-a1c4-ad5adbbefcdc
Diffstat (limited to 'man/drfit.Rd')
-rw-r--r--man/drfit.Rd16
1 files changed, 7 insertions, 9 deletions
diff --git a/man/drfit.Rd b/man/drfit.Rd
index a89b5dd..453c0f8 100644
--- a/man/drfit.Rd
+++ b/man/drfit.Rd
@@ -7,7 +7,7 @@
}
\usage{
drfit(data, startlogED50 = NA, chooseone = TRUE, probit = TRUE, logit = FALSE,
- weibull = FALSE, linlogit = FALSE, conf = FALSE, linlogitWrong = NA,
+ weibull = FALSE, linlogit = FALSE, level = 0.95, linlogitWrong = NA,
allWrong = NA, s0 = 0.5, b0 = 2, f0 = 0)
}
\arguments{
@@ -43,10 +43,8 @@
A boolean defining if the linear-logistic function
\code{\link{linlogitf}} as defined by van Ewijk and Hoekstra 1993 is
fitted to the data. Default is FALSE.}
- \item{conf}{
- A boolean defining if a confidence interval of the log ED50 is to be
- listed for alpha = 5 \% (two-sided). If FALSE (default), the standard
- deviation is listed in the output of drfit.}
+ \item{level}{
+ The level for the confidence interval listed for the log ED50.}
\item{linlogitWrong}{
An optional vector containing the names of the substances for which the
linlogit function produces a wrong fit.}
@@ -81,10 +79,10 @@
\code{lhd} is the decadic logarithm of the highest dose. For the
\dQuote{linlogit}, \dQuote{logit} and \dQuote{probit} models, the
parameter \code{a} that is reported coincides with the logED50, i.e the
- logED50 is one of the model parameters that is being fitted, and
- therefore, depending on the argument \code{conf}, a standard deviation
- \code{std} or a confidence interval \code{conf} is reported for the
- logED50. In the case of the \dQuote{weibull} model, \code{a} is a
+ logED50 is one of the model parameters that is being fitted. Therefore,
+ a confidence interval for the confidence level \code{level} is calculated
+ using the \code{\link[MASS:confint]{confint.nls}} function and listed.
+ In the case of the \dQuote{weibull} model, \code{a} is a
location parameter. Parameter \code{b} in the case of the
\dQuote{linlogit} fit is the variable b from the \code{\link{linlogitf}}
function. In the case of \dQuote{probit} fit it is the standard deviation

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