− | Statistical analysis of self tracking data is usually done on tabular data, like spreadsheets, with rows representing individual observations.<ref>https://en.wikipedia.org/wiki/Relational_database</ref> In all but a few cases this is sufficient structure. | + | Statistical analysis of self tracking data is usually done on tabular data, like spreadsheets, with rows representing individual observations.<ref>https://r4ds.had.co.nz/tidy-data.html</ref><ref>https://en.wikipedia.org/wiki/Relational_database</ref> In all but a few cases this is sufficient structure. |