train_position: Train position scales with data
Description
If panel-specific scales are not already present, will clone from
the scales provided in the parameter
Usage
train_position(panel, data, x_scale, y_scale)
Arguments
- panel
the panel object to train
- data
a list of data frames (one for each layer)
- x_scale
x scale for the plot
- y_scale
y scale for the plot