drm() function + inslall "drc" issue

Hi, everyone,

Have an issue: not working drm function for me:

Error in .helpForCall(topicExpr, parent.frame()) :
no methods for ‘drm’ and no documentation for it as a function

Here is drm() function description: https://www.rdocumentation.org/packages/drm/versions/0.5-8

What i have tried already, based on search:

  1. install.packages("drm")
    Warning in install.packages :
    package ‘drm’ is not available (for R version 3.6.1)

  2. install.packages("drc")

also installing the dependency ‘car’....

Any advises for the R-Studio beginner would be highly appreciated !

also installing the dependency ‘car’

There is a binary version available but the source version is later:
binary source needs_compilation
car 3.0-8 3.0-9 FALSE

trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.6/drc_3.0-1.zip'
Content type 'application/zip' length 928888 bytes (907 KB)
downloaded 907 KB

package ‘drc’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
installing the source package ‘car’

trying URL 'https://cran.rstudio.com/src/contrib/car_3.0-9.tar.gz'
Content type 'application/x-gzip' length 500448 bytes (488 KB)
downloaded 488 KB

  • installing source package 'car' ...
    ** package 'car' successfully unpacked and MD5 sums checked
    ** using staged installation
    ** R
    ** inst
    ** byte-compile and prepare package for lazy loading
    Warning message:
    package 'carData' was built under R version 3.6.3
    Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
    there is no package called 'foreign'
    Calls: ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
    Execution halted
    ERROR: lazy loading failed for package 'car'
  • removing 'C:/Users/nmuravskaya/AppData/Local/Continuum/anaconda3/Lib/R/library/car'
    Warning in install.packages :
    installation of package ‘car’ had non-zero exit status

The downloaded source packages are in

The drm package hasn't been on CRAN since at least 8 years ago and it doesn't seem to be maintained any more but you can still install it from the GitHub CRAN mirror.


This other error message is telling you that you are missing a package dependency and you need to install it, the problem is that the foreing package requires R >= 4.0.0 so you need to update your R version to be able to install this package.

Thanks @andresrcs for the prompt response. it works!

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