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-rw-r--r--man/loq.Rd9
1 files changed, 7 insertions, 2 deletions
diff --git a/man/loq.Rd b/man/loq.Rd
index 1030399..4850487 100644
--- a/man/loq.Rd
+++ b/man/loq.Rd
@@ -49,6 +49,11 @@
limit of detection is the x value, where the relative error
of the quantification with the given calibration model is 1/k.
}
+\note{
+ IUPAC recommends to base the LOQ on the standard deviation of the
+ signal where x = 0. The approach taken here is to my knowledge
+ original to the chemCal package.
+}
\examples{
data(massart97ex3)
attach(massart97ex3)
@@ -68,9 +73,9 @@
mwy <- lm(y ~ x, w = 1/y)
# Let's do this with one iteration only
- loq(mwy, w = 1 / predict(mwy,list(x = loq(mwy))))
+ loq(mwy, w = 1 / predict(mwy,list(x = loq(mwy)$x)))
# We can get better by doing replicate measurements
- loq(mwy, n = 3, w = 1 / predict(mwy,list(x = loq(mwy))))
+ loq(mwy, n = 3, w = 1 / predict(mwy,list(x = loq(mwy)$x)))
}
\keyword{manip}

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