Shannon index for Mapper

mapper_shannon_index computes Shannon indices for nodes of a given graph from Mapper.

mapper_shannon_index(obj_mapper, group_ind)

Arguments

obj_mapper	An object of class TDAmapper.
group_ind	A vector of group names each of the samples belongs to.

Value

A list object with two objects. The first object is the weighted average Shannon index for the whole graph. The second object is the matrix of Shannon indices for each of the nodes in the graph, where the first column is the vector of indices and the second column is the vector of node sizes.

Details

how it is computed

Examples

tp_data <- chicken_generator(1)
tp_data_mapper <- mapper.sta(dat = tp_data[,2:4],
                               filter_values = tp_data$Y,
                               num_intervals = 10,
                               percent_overlap = 70)
tp_shannon <- mapper_shannon_index(tp_data_mapper, tp_data$Group)
tp_shannon