convert_names: Internal helper function that converts axis name to internal variable name
Description
Internal helper function that converts axis name to internal variable name
Usage
convert_names(x, y, z = NULL)
Value
a named list with variable names for visualization for internal use
Arguments
- x
the user input character for x-axis value
- y
the user input character for y-axis value
- z
the user input character for z-axis value