unable to install/load visNetwork dependency for panda_gtex_tutorial_server.ipynb netbook

[wilsonavac]

install.packages("visNetwork")

Warning message in install.packages("visNetwork"):
“'lib = "/opt/conda/envs/rc4/lib/R/library"' is not writable”
Error in install.packages("visNetwork"): unable to install packages
Traceback:

1. install.packages("visNetwork")
2. stop("unable to install packages")

[marouenbg]

duplicate in #29