banking.md
In ggthemes: Extra Themes, Scales and Geoms for 'ggplot2'

bank_slopes with invalid method throws error

Code
  bank_slopes(1:5, 1:5, method = "aor")
Condition
  Error in `bank_slopes()`:
  ! `method` must be one of "ms", "as", "ao", or "was", not "aor".
  i Did you mean "ao"?

bank_plot errors for an out-of-range layer index

Code
  bank_plot(p, layer = 2)
Condition
  Error in `bank_plot()`:
  ! `plot` only has 1 layer(s), but `layer` = 2.

bank_plot errors for a non-positive layer index

Code
  bank_plot(p, layer = 0)
Condition
  Error in `bank_plot()`:
  ! `plot` only has 1 layer(s), but `layer` = 0.

Code
  bank_plot(p, layer = -1)
Condition
  Error in `bank_plot()`:
  ! `plot` only has 1 layer(s), but `layer` = -1.

bank_plot errors when the layer has no x/y columns

Code
  check_bank_plot_data(data.frame(xmin = 1:3, xmax = 2:4))
Condition
  Error in `check_bank_plot_data()`:
  ! The layer data is missing required column(s): x and y.
  i `bank_plot()` needs both x and y.