facebook/prophet

Rcpp error when using prophet::prophet() instead of library(prophet)

Open

#285 opened on Aug 31, 2017

View on GitHub
 (7 comments) (2 reactions) (0 assignees)Python (17,686 stars) (4,451 forks)batch import
bughelp wanted

Description

When I don't use library(prophet) and instead use the fully-qualified prophet::prophet, I get the following in my console:

ds <- seq(as.Date('2005-04-01'), as.Date('2005-09-03'), by='day') x <- (1:length(ds))/length(ds) y <- rnorm(length(ds), x * (1 - x) + 0.5, 0.1) prophet::prophet(data.frame(ds = ds, y = y), yearly.seasonality = FALSE)

Error in .Object$initialize(...) : could not find function "cpp_object_initializer" failed to create the optimizer; optimization not done Error in matrix(m$params[[name]], nrow = n.iteration) : 'data' must be of a vector type, was 'NULL'

I'm using the latest revision from master (via devtools::install_github('facebookincubator/prophet', subdir='R'))

Contributor guide

Tech stack
cpp
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
R programmingRcpp basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate how the Rcpp module for prophet is loaded. The error 'could not find function cpp object initializer' when using prophet::prophet suggests that the C++ module is not initialized when the package is accessed via :: without attaching. Look at the R package initialization code, typically in R/zzz.R, to see if the Rcpp module is loaded in .onLoad or only in .onAttach. Also examine the C++ source in src/ and the RcppExports.R file. Check the issue comments for any additional debugging or hints. The fix likely involves ensuring the Rcpp module is loaded at package load time rather than attachment.