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rbenfords-lawbenford.analysis

Benford’s Law by group in R

I am attempting to implement Benford’s Law using the benford.analysis package in R across all vendors’ invoices. Over the entire dataset the data confirms. I’m trying to find a way to group by vendor to determine if any individual vendor is displaying fraud indicators by not conforming. Is there a way to break out non-conforming by group?

Solution

  • Here is a way to use group_by and group_map to create benford.analysis plots for each group. In this example, grouping Iris data by Species and performing analysis on Sepal Length variable.

    In group_map(), .x means the grouped subset data, and .y means the name of the group.

    library(dplyr)
library(benford.analysis)
iris %>% 
  group_by(Species) %>% 
  group_map(.f = ~ plot(benford(.x$Sepal.Length)))