Pessoal, boa tarde, não estou conseguindo instalar o pacote RWeka. O que devo fazer?

* install.packages("RWeka")* WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/ Installing package into ‘C:/Users/usuario/Documents/R/win-library/3.6’ (as ‘lib’ is unspecified) trying URL ' https://cran.rstudio.com/bin/windows/contrib/3.6/RWeka_0.4-41.zip' Content type 'application/zip' length 632650 bytes (617 KB) downloaded 617 KB package ‘RWeka’ successfully unpacked and MD5 sums checked The downloaded binary packages are in C:\Users\usuario\AppData\Local\Temp\Rtmp0w0FBo\downloaded_packages Então peguei a versão recomentada do Rtool35.exe ( https://cran.rstudio.com/bin/windows/Rtools/) e instalei dentro da pasta (C:/Users/usuario/Documents/R/win-library/3.6) do meu computador. E depois instalei o RWeka, usando o zip ( https://cran.rstudio.com/bin/windows/contrib/3.6/RWeka_0.4-41.zip) e também usando o comando como mencionei acima. As pastas Rtools e Rweka aparecem dentro de ( C:/Users/usuario/Documents/R/win-library/3.6) como se já tivesse instalado. Porém, quando chamo a biblioteca RWeka, aparece o seguinte erro.

*library(RWeka)* Error: package or namespace load failed for ‘RWeka’: .onLoad falhou em loadNamespace() para 'rJava', detalhes: chamada: fun(libname, pkgname) erro: JAVA_HOME cannot be determined from the Registry