install.packages - Unable to install xlsx package on R version 3.1.3 -


when run install.packages("xlsx") this:

installing package ‘c:/users/zahra/documents/r/win-library/3.1’ (as ‘lib’ unspecified) warning: unable access index repository https://rweb.quant.ku.edu/cran/bin/windows/contrib/3.1 warning: unable access index repository http://www.rforge.net/bin/windows/contrib/3.1 warning message: package ‘xlsx’ not available (as binary package r version 3.1.3)

i tried setrepositories , couple of more things no luck! appreciate comments

i found own answer! figured problem installing packages, required package "rjava" couldn't loaded. reason fact using 64-bit os , r version not have java installed same architecture.i downloaded java 64-bit(windows offline (64-bit)) page: https://www.java.com/en/download/manual.jsp after reloaded xlsx package , worked


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