Function to calculate daily migration from migration monitoring whose length is less than one day, typically video recording whose period are instant events.
fun_report_mig_mult(time.sequence, datasub, negative = FALSE)the time sequence to be filled in with new data
the initial dataset
'boolean', default FALSE, TRUE indicates a separate sum for negative and positive migrations
A data.frame with number summed over over the time.sequence. The function returns the same output than fun_report_mig_mult_overlaps but is intended to work faster. In the data.frame, the total number is 'Effectif_total' and corresponds to the addition of numbers and numbers converted from weight, the total weight is 'Poids_total'+'poids_depuis_effectifs' and corresponds to weighed glass eel plus glass eel number converted in weights.