11.23 Bar Chart Showcase Solar

20210413

solar %>%
  ggplot(aes(x=date, y=amount, fill=item)) +
  geom_col(position="dodge") +
  geom_label(aes(label=amount), vjust=-0.2, show.legend=FALSE,
             position=position_dodge(width=0.9), size=2) +
  theme(axis.text.x=element_text(angle=45, hjust=1)) +
  scale_x_discrete(breaks = unique(solar$date)) +
  ylim(0,600) +
  theme(legend.position="top") +
  labs(x="Quarter", y="Amount", fill="") +
  scale_fill_brewer(palette="Accent")

The solar dataset records 8 quarterly observations of the amount of electricity generated by solar photovoltaic panels, the amount consumed by the household, and a fixed overhead:

glimpse(solar)

## Rows: 24
## Columns: 3
## $ date   <ord> Jun 2019, Jun 2019, Jun 2019, Sep 2019, Sep 2019, Sep 2019, Dec…
## $ item   <ord> Fixed, Consumed, Generated, Fixed, Consumed, Generated, Fixed, …
## $ amount <dbl> 99, 170, 313, 97, 251, 329, 98, 115, 521, 106, 128, 514, 93, 34…

Exercise: plot Fixed and Consumed as a single stacked bar placed beside the Generated bar.

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