>temp_feel</code>, <code>humidity</code>, and <code>wind_speed</code> (C) of the cleaned and aggregated bike sharing data set. In panel C, the correlation between the variables is shown as scatterplot encoded by <code>timeperiod</code> (upper triangle) and encoded by point density (lower triangle), highlighting the level of overlap of data points.
</p>
</div>
<p><br></p>
<!--
* `date` — encoded as `YYYY-MM-DD`
* `timeperiod` — `day` (6:00am--5:59pm) and `night` (6:00pm--5:59am)
* `year` — either `2015