Error: 'create_cluster'

[zhengjiji456]

I prepared the codes below

multidplyr::create_cluster() %>%
cluster_library(c('r3PG', 'purrr', 'dplyr', 'tidyr')) %>%
cluster_copy( r3pg_grid ) %>%
cluster_copy( species.grid ) %>%
cluster_copy( thinn.grid ) %>%
cluster_copy( param.draw )

However, I got an error message
Error: 'create_cluster' is not an exported object from 'namespace:multidplyr'

Was this function creat_cluster removed? (https://www.rdocumentation.org/packages/multidplyr/versions/0.0.0.9000/topics/create_cluster)

[trotsiuk]

Hi @zhengjiji456 .

I think you are using a never version of multidplyr, installed from GitHub. In this version they have changed the syntax for cluster partitioning.

Here would be a correct syntax for the version of multidplyr()

cl_in <- new_cluster(n = 7) %>% # where `n` is a number of clusters
  cluster_library(c('r3PG', 'purrr', 'dplyr', 'tidyr')) %>%
  cluster_copy( 'r3pg_grid' ) %>%
  cluster_copy( 'species.grid' ) %>%
  cluster_copy( 'thinn.grid' ) %>%
  cluster_copy( 'param.draw' )

#' `hide the sample_n`
sim.grid <- inner_join(site.grid, climate.grid, by = 'grid_id')  %>%
  sample_n(10) %>% # remove this for full simulation
  partition( cluster = cl_in) %>%
  mutate( out = map2(site, forc, ~r3pg_grid(.x, .y))) %>%
  select( grid_id, out) %>%
  collect() %>%
  unnest_legacy() %>%
  ungroup()