subscript out of bounds error in R programming

Question

Getting following error while using prophet library:

Error in [<-(*tmp*, m$history$t >= m$changepoints.t[i], i, value = 1) : subscript out of bounds

Code : m <- prophet(data) this data I've loaded from csv file.

My dataset looks like this :

                   ds        y 
1 2017-05-23 08:07:00 21.16641
2 2017-05-23 08:07:10 16.79345
3 2017-05-23 08:07:20 16.40846
4 2017-05-23 08:07:30 16.24653
5 2017-05-23 08:07:40 16.14694
6 2017-05-23 08:07:50 15.89552

ds column is of following type :"POSIXct" "POSIXt" y column is of following type :"numeric" (these are log values of some count values)

Being new to R, i don't have any clue on how to resolve this. Please help.

See `?prophet`, the `ds` variable needs to be a Date class (not POSIXct). This works (but is of course fake): `data$ds <- seq.Date(as.Date("2016-1-1"),as.Date("2016-1-6"), by="1 day")` and then run `prophet(data)` — Remko Duursma, May 25 '17 at 01:38
@RemkoDuursma, I am facing the same problem, but my ```ds``` variable is a ```Date```. Any other suggestion? — Eduardo, Jul 21 '17 at 23:27
No I don't - can you post a reproducible problem (with some made-up data)? — Remko Duursma, Jul 23 '17 at 09:42

score 1 · Accepted Answer · edited Jul 29 '17 at 16:51

Your data does not have any change points (points of interest in your data series where there is change in the local trend direction). This error seems like a bug in the Prophet package which is not handling this situation gracefully. However you can fix this by setting the changepoint tuning parameters.

Quick fix: set changespoints to 0 by using param:

n.changepoints = 0

in your prophet call.

subscript out of bounds error in R programming

1 Answers1