Hi there,
I am using R version 2-12.1 and I am trying to use drm functions which is
version 0.5-8 both are the latest versions.
but still it get the same Error drm(Response ~ Expected, data = SC, fct =
LL.4()) :
Cluster not specified. Use e.g. y ~ x + cluster(id)
Any help would be of much help.
my data
> SC <- read.delim("/Users/Ramya/d1.txt")
> SC
Response Expected
1 10.06235 500.0
2 16.62795 250.0
3 28.79325 125.0
4 44.03961 62.5
5 60.19685 31.3
6 77.03876 15.6
7 80.17484 7.8
8 82.66292 3.9
> FourP <- drm(Response~Expected, data = SC, fct = LL.4())
Error in drm(Response ~ Expected, data = SC, fct = LL.4()) :
Cluster not specified. Use e.g. y ~ x + cluster(id)
Thanks
Ramya
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