# Can't Access Functions After Install R Additional Package

Hi,

I'm trying to install an additional package for R, "SampleSizeMeans." In the Notebook, I type r.install_packages('SampleSizeMeans') and it seems to install properly (output pasted below). Note I do this with "Sage" as the worksheet type at the top.

I've quit Sage completely and restarted the notebook, but none of the functions are available. I switch the Type in the Sage notebook to "R" and type "mu.acc(len=0.2, alpha=2, beta=2, n0=10)" (one of the examples) but it says "Error: could not find function "mu.acc".

Am I missing something or is this a bug?

Thanks very much,

Justin

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options(repos="http://cran.r-project.org/"); install.packages("SampleSizeMeans") trying URL 'http://cran.r-project.org/src/contrib/SampleSizeMeans_1.0.tar.gz' Content type 'application/x-gzip' length 14807 bytes (14 Kb)

## opened URL

downloaded 14 Kb

installing

*source*package SampleSizeMeans ...** R **preparing package for lazy loading** help *** installing help indices** building package indices ... **testing if installed package can be loadedDONE (SampleSizeMeans)

The downloaded packages are in /tmp/RtmpG4jlho/downloaded_packages

Please restart Sage in order to use 'SampleSizeMeans'.

You figured this out, but loading a library should also be necessary for R packages within a standard (non-Sage) R session - just for those who find this later. I don't think there is any way around this.