[x] "Error in plot.window(...) : need finite 'xlim' values". This is a common error when plotting via R-Studio & Windows. I forgot how to fix it, but should be addressed.
[x] Need to note that the date column in "tracks" dataframe needs to be named "datetime" otherwise there's an error.
[x] "zoo" pkg needs to be installed/loaded (in function script?) in order to use rollmean().