Constructs a data frame object so that varieties are spread such that they do not overlap, even though the x-axis position will represent dates.
buildSpreadTotalDF(geneal, ig, colName, bin = 12)
the full genealogy (in data frame format)
the graph representation of the data genealogy (in igraph format)
the name of the column of the data frame that contains the quantitative variable of interest (in character string format)
the number of bins to determine the vertical positions of nodes (default is 12). For more information on choosing bin size, please visit the ggenealogy vignette
https://www.r-project.org for iGraph information