CODE EXAMPLE FOR PYTHON

In is_lodes_form( : Missing id-axis pairings.

library(dplyr)                                          # to manipulate data
library(alluvial)
allu <- data %>% 
        group_by(Diagnose1, Diagnose2, Diagnose3) %>%   # grouping
        summarise(Freq = n())                           # adding frequencies

# here the plot
alluvial(allu[,1:3], freq=allu$Freq)