is there function returns index integer increment of time? xts, there 'days', 'weekdays', etc. if want 2 days, 6 days?
the endpoints function has argument (k) this:
library(xts) data(sample_matrix) x <- as.xts(sample_matrix) endpoints(x, "months") # [1] 0 30 58 89 119 150 180 endpoints(x, "months", k=2) # [1] 0 58 119 180 endpoints(x, "months", k=3) # [1] 0 89 180 