package ‘xlsx’ is not available (for R version 3.4.3)

Bonjour à tous,

J'essaye désespérément d'installer le package xlsx.

Voici le message obtenu

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Warning in install.packages :
  unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/3.4:
  internet routines cannot be loaded
Warning in install.packages :
  unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.4:
  internet routines cannot be loaded

J'ai tenté également ceci :

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install.packages("C:/Program Files/R/R-3.4.3/library/rJava_0.9-9.tar.gz", type = "source", repos = NULL)
* installing *source* package 'rJava' ...
** package 'rJava' successfully unpacked and MD5 sums checked
Warning: running command 'sh ./configure.win' had status 127
ERROR: configuration failed for package 'rJava'
* removing 'C:/Program Files/R/R-3.4.3/library/rJava'
In R CMD INSTALL
Warning in install.packages :
  running command '"C:/PROGRA~1/R/R-34~1.3/bin/i386/R" CMD INSTALL -l "C:\Program Files\R\R-3.4.3\library" "C:/PROGRA~1/R/R-34~1.3/library/rJava_0.9-9.tar.gz"' had status 1
Warning in install.packages :
  installation of package ‘C:/PROGRA~1/R/R-34~1.3/library/rJava_0.9-9.tar.gz’ had non-zero exit status

Je fais le tour des forum mais je ne trouve pas mon bonheur

Voici la version de mon ordi :

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platform       i386-w64-mingw32            
arch           i386                        
os             mingw32                     
system         i386, mingw32               
status                                     
major          3                           
minor          4.3                         
year           2017                        
month          11                          
day            30                          
svn rev        73796                       
language       R                           
version.string R version 3.4.3 (2017-11-30)
nickname       Kite-Eating Tree

Merci pour toute l'aide du monde

R version 3.4.4 (2018-03-15) -- "Someone to Lean On" Copyright (C) 2018 The R Foundation for Statistical Computing Platform: i386-w64-mingw32/i386 (32-bit) > install.packages("xlsx",dep=TRUE) Installing package into ‘C:/Users/dondon/Documents/R/win-library/3.4’ (as ‘lib’ is unspecified) also installing the dependencies ‘rJava’, ‘xlsxjars’ trying URL 'https://cran.univ-paris1.fr/bin/windows/contrib/3.4/rJava_0.9-9.zip' Content type 'application/zip' length 720033 bytes (703 KB) downloaded 703 KB trying URL 'https://cran.univ-paris1.fr/bin/windows/contrib/3.4/xlsxjars_0.6.1.zip' Content type 'application/zip' length 9485450 bytes (9.0 MB) downloaded 9.0 MB trying URL 'https://cran.univ-paris1.fr/bin/windows/contrib/3.4/xlsx_0.5.7.zip' Content type 'application/zip' length 401236 bytes (391 KB) downloaded 391 KB package ‘rJava’ successfully unpacked and MD5 sums checked package ‘xlsxjars’ successfully unpacked and MD5 sums checked package ‘xlsx’ successfully unpacked and MD5 sums checked The downloaded binary packages are in C:\Users\dondon\AppData\Local\Temp\RtmpSEahja\downloaded_packages > library(xlsx) Loading required package: rJava Loading required package: xlsxjars