Interactive Visualization
                  for
Exploratory Data Analysis

Installing R

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tcltk dependency

The loon package depends on the tcltk package which comes shipped with the default R system. Note that

• Mac OSX users may have to first install XQuartz (if you have not already done so).
• Linux and Windows users should not need to do anything extra.

You can check whether tcltk works in your R (Mac users after installing XQuartz) by simply attaching it:

library(tcltk)

If it failed to find the tcltk package, then you should install a new R release as described below.

If it worked and your R version is greater than 3.5.0, then you are in business. The course will be using the most recent release of R.

You can check your current R release by typing

R.version.string

## [1] "R version 4.0.5 (2021-03-31)"

Install a new R release if necessary

To get the latest R go to https://cran.r-project.org and select the appropriate download for your machine. Note that tcltk needs to be part of the installation.

• Macs: this happens automatically with the basic system; you will need to install XQuartz on your machine.

• Windows: this also happens automatically with the basic system.

  Note however that the instructions there mention that

  • “Support Files for Package tcltk” needs to be selected from the installer.

    This seems to be the default.

• Linux: you should be able to figure this out :-)

  • You should also install the libtk-img debian package (e.g. with sudo apt-get install libtk-img) in order to get a wide variety of export formats with the l_export function. (Tested at least on Ubuntu.)

Once the new release of R has been installed, you may want to re-install/update any R packages that you have.