I have trouble with drc that previously worked. Please see code i installed in R , it is not recognizing drm or drc.

General
1

I have trouble with drc that previously worked. Please see code i installed in R , it is not recognizing drm or drc.

library(drc)
Error: package or namespace load failed for ‘drc’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
there is no package called ‘car’
data<-read.csv("Loss.csv")
head(data)
Dens Loss
1 0.0000 0.00000
2 0.0000 0.00000
3 0.0000 0.00000
4 12.5000 22.04724
5 15.2778 17.32283
6 9.7222 21.84211
acidiq.free <- drm(Dens~ Loss,data =data, fct = LL.4())
Error in drm(Dens ~ Loss, data = data, fct = LL.4()) :
could not find function "drm"
acidiq.free <- drmc(Dens~ Loss,data =data, fct = LL.4())
Error in drmc(Dens ~ Loss, data = data, fct = LL.4()) :
could not find function "drmc"
acidiq.free <- drc(Dens~ Loss,data =data, fct = LL.4())
Error in drc(Dens ~ Loss, data = data, fct = LL.4()) :
could not find function "drc"

2

You are missing this package dependency, try installing it

install.packages("car")
3

Thank You very much.
It says car is not available even with an old version of r.
install.packages("car")
Warning in install.packages("car") :
'lib = "C:/Program Files/R/R-3.0.3/library"' is not writable
Warning: unable to access index for repository https://pbil.univ-lyon1.fr/CRAN/bin/windows/contrib/3.0
Warning message:
package ‘car’ is not available (for R version 3.0.3)

4

car requieres R version >= 3.5.0 you are using a very old version of R you should update it to avoid this kind of problems.

5

Sincere Thanks Andres. It is resolved.

6

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