[R] install R packages--sorry last letter that I sent I had an error, this one is the right one

Li, Jia LI at nsabp.pitt.edu
Thu May 19 16:09:09 CEST 2005

Dear All,
When I tried to install R packages I found this error:
> library(survival)
Loading required package: splines
> install.packages("splines")
--- Please select a CRAN mirror for use in this session ---
Warning message:
package splines is in use and will not be installed 

But I just opened R, and haven't used anything yet, how come did it say "package splines is in use"?

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