Since yesterday, I cannot load some common used packages, e.g. reshape2 and stringr through library command.
Step to reproduce my problem:
1) Start a new session in Rstudio server (Version 0.99.467). I also kill the active-sessions in Rstudio server.
2) Run these codes
library(ggplot2)
library(stringr)
3) Get an error message:
Error in unloadNamespace(package) : namespace ‘stringr’ is imported by ‘reshape2’ so cannot be unloaded Show Traceback
Rerun with Debug
Error in library(stringr) : “stringr” version 0.6.2 cannot be unloaded.
But I don't get error if stringr is loaded before ggplot2. How should I fix this problem. Thanks for any suggestions.
I may have to update R to 3.2
My R session info:
R version 3.1.3 (2015-03-09)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu precise (12.04.5 LTS)
locale:
[1] LC_CTYPE=en_AU.UTF-8 LC_NUMERIC=C LC_TIME=en_AU.UTF-8 LC_COLLATE=en_AU.UTF-8
[5] LC_MONETARY=en_AU.UTF-8 LC_MESSAGES=en_AU.UTF-8 LC_PAPER=en_AU.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C LC_MEASUREMENT=en_AU.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] ggplot2_1.0.0
loaded via a namespace (and not attached):
[1] colorspace_1.2-4 digest_0.6.4 grid_3.1.3 gtable_0.1.2 MASS_7.3-39 munsell_0.4.2 plyr_1.8.1
[8] proto_0.3-10 Rcpp_0.11.2 reshape2_1.4 scales_0.2.4 stringr_0.6.2 tools_3.1.3
Answer
I resolved my problem through updating R and all R packages.
I guess the problem is caused by old version of stringr or reshape2 as I install the same packages in different places (system folder or personal library). R tried to load a old version of package.