New version, adding a comparison of the meaning of the alpha parameter between

calplot and lod. Thanks to Jeremie Lasue from the Los Alamos National Lab (USA)
for the hint and the suggestion how to address it.



git-svn-id: http://kriemhild.uft.uni-bremen.de/svn/chemCal@27 5fad18fb-23f0-0310-ab10-e59a3bee62b4

1 files changed, 8 insertions, 1 deletions

diff --git a/branches/0.1/chemCal/man/calplot.lm.Rd b/branches/0.1/chemCal/man/calplot.lm.Rd
index 6f6d584..b60a032 100644
--- a/branches/0.1/chemCal/man/calplot.lm.Rd
+++ b/branches/0.1/chemCal/man/calplot.lm.Rd
@@ -30,7 +30,9 @@
     The label of the y axis.
   }
   \item{alpha}{
-    The error tolerance level for the confidence and prediction bands.
+    The error tolerance level for the confidence and prediction bands. Note that this 
+    includes both tails of the Gaussian distribution, unlike the alpha and beta parameters
+    used in \code{\link{lod}} (see note below).
   }
   \item{varfunc}{
     The variance function for generating the weights in the model.
@@ -48,6 +50,11 @@
   using weights e.g. from a variance function are currently not supported by
   the internally used function \code{\link{predict.lm}}, therefore,
   \code{calplot} does not draw prediction bands for such models.
+  
+  It is possible to compare the \code{\link{calplot}} prediction bands with the
+  \code{\link{lod}} values if the \code{lod()} alpha and beta parameters are
+  half the value of the \code{calplot()} alpha parameter.
+  
 }
 \examples{
 data(massart97ex3)