This is a data manipulation function for facility_user_dist. This function creates a spread matrix of the distances between each ohca and each aed. There is an ohca_id column, and then a column for each aed_id, with a given cell being the distance between an ohca in a row, and that column. This distance is converted into an indicator variable, based upon whether that distance is less than the provided dist_indic parameter. In the future I might change the dist_indic function to be optional, but this whole function mainly exists to make it easier to do the computation in the max_coverage function.
a dataframe from facility_user_dist. Requires nearest = "both"
an indicator of the distance you want to be TRUE / FALSE
a dataframe with variables ohca_id, and aed_id_number, with the id from each aed_id being transposed into each column name.