Объединить значения строк на основе временного интервала

#r #dplyr #r #dplyr Вопрос: У меня есть такой фрейм данных node <- c("ABCC","ABCC","ABCC","ABCC","ABCC","ABCC","ABCC","ABCC","ABCC") activity <-c("NODE_ISOLATION","NE_NOT_REACH_VIA_PRIMARY_MNG_INTERF","NODE_ISOLATION","LOSS_OF_MULTIPLEX_SECTION-OMS_A","NODE_ISOLATION","NE_NOT_REACH_VIA_PRIMARY_MNG_INTERF","NE_NOT_REACH_VIA_PRIMARY_MNG_INTERF", "UNDERLYING_RESOURCE_UNAVAILABLE-OMS_A","UNDERLYING_RESOURCE_UNAVAILABLE-OMS_A") e <-c("2020-05-08 16:11:58","2020-05-08 16:11:58","2020-05-08 16:30:07","2020-05-09 03:00:08","2020-05-09 03:08:08","2020-05-09 03:28:08","2020-05-09 13:08:08","2020-05-09 13:10:08","2020-05-09 13:28:08") df <-…