Check function for multiple values for an area in an indicator for spine chart

spine_data_check(data, indicator, area_code)

Arguments

data: a data frame to create the spine chart from. The data frame should contain records for all area types included in the chart (eg, if plotting for County & UA with a comparator of region and a median line for national, the data frame should contain records for all of these data). The minimum field requirements in the data frame are; value, count, area_code, indicator, timeperiod, polarity, significance, area_type. See below for the definitions of these fields
indicator: unquoted field name for the field of the field containing the indicator labels. Take care as errors will occur where indicator labels are the same but data exist for multiple sub-categories (for example, sex or age)
area_code: unquoted field name for the field where area codes are stored (local_area_code, median_line_area_code and comparator_area_code, if using, should all exist in this field)