[R] Help Installing Rtools

[Doran, Harold]

I've done the following steps, but am unable to source in the Cpp files. Details of my session and sessionInfo are below. Am I missing a package, or a critical step? I found one answer regarding the 'make" error on stackoverflow suggesting the problem is resolved by grabbing the more recent version of Rtools, which I have done.

Thanks.

> install.packages('installr')
> library(installr)
> install.Rtools()

This step installed Rtools35.exe correctly as far as I can tell. Then,

> library(devtools)
Loading required package: usethis
> library(Rcpp)
> sourceCpp("test.cpp")
Warning message:
In system(cmd) : 'make' not found
Error in sourceCpp("test.cpp") :
  Error 1 occurred building shared library.

WARNING: The tools required to build C++ code for R were not found.

Please download and install the appropriate version of Rtools:

http://cran.r-project.org/bin/windows/Rtools/

> sessionInfo()
R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] Rcpp_1.0.2      devtools_2.1.0  usethis_1.5.1   htmltab_0.7.1
[5] installr_0.22.0 stringr_1.4.0

loaded via a namespace (and not attached):
[1] magrittr_1.5      pkgload_1.0.2     R6_2.4.0          rlang_0.3.4
 [5] httr_1.4.1        tools_3.6.1       pkgbuild_1.0.5    sessioninfo_1.1.1
[9] cli_1.1.0         withr_2.1.2       remotes_2.1.0     rprojroot_1.3-2
[13] assertthat_0.2.1  digest_0.6.19     crayon_1.3.4      processx_3.4.1
[17] callr_3.3.1       fs_1.3.1          ps_1.3.0          testthat_2.2.1
[21] curl_4.0          memoise_1.1.0     glue_1.3.1        stringi_1.4.3
[25] compiler_3.6.1    backports_1.1.4   desc_1.2.0        prettyunits_1.0.2
[29] XML_3.98-1.20
>

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