Is dply package pre installed ?

Hi
I get an Error 1000: RPackage library exception: Cannot convert R object of class tbl_df
when running the R script code below. I thought dplyr package was pre installed. I've tried to install it within the code but it takes ages ... In case of requiring package installation, what is best practice ?
Thanks
# Map 1-based optional input ports to variables
dataset1 <- maml.mapInputPort(1) # class: data.frame
#install.packages("dplyr")
library(dplyr)
data.set <- tbl_df(dataset1)
glimpse(data.set)
outdf1 <- data.set %>% filter(!is.na(mood_valence) | !is.na(mood_arousal))
# Select data.frame to be sent to the output Dataset port
maml.mapOutputPort("outdf1");

Hello!
That looks like a slightly misleading exception name: the true error is the "Cannot convert R object of class tbl_df" part.
At the moment, only objects of data.frame are supported on egress so please convert any object to type data.frame before you maml.mapOutputPort() it
Regards,
AK

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