ERROR: UndefVarError: identifier not defined

[bigdataman2015]

julia> import Pkg

julia> Pkg.add("RDatasets") Updating registry at ~/.julia/registries/General Updating git-repo https://github.com/JuliaRegistries/General.git Resolving package versions... Installed RDatasets ─ v0.6.8 Updating ~/.julia/environments/v1.4/Project.toml [ce6b1742] + RDatasets v0.6.8 Updating ~/.julia/environments/v1.4/Manifest.toml [78c3b35d] + Mocking v0.7.1 [df47a6cb] + RData v0.6.3 [ce6b1742] + RDatasets v0.6.8 [f269a46b] + TimeZones v1.2.0

julia> using RDatasets [ Info: Precompiling RDatasets [ce6b1742-4840-55fa-b093-852dadbb1d8b] WARNING: could not import DataFrames.identifier into RData

julia> using RDatasets

julia> dataset("datasets", "iris") Error encountered while loading "/home/clyu/.julia/packages/RDatasets/WIQKI/src/../data/datasets/iris.rda".

Fatal error: ERROR: UndefVarError: identifier not defined Stacktrace: [1] handle_error(::UndefVarError, ::FileIO.File{FileIO.DataFormat{:RData}}) at /home/clyu/.julia/packages/FileIO/ZknoK/src/error_handling.jl:82 [2] handle_exceptions(::Array{Any,1}, ::String) at /home/clyu/.julia/packages/FileIO/ZknoK/src/error_handling.jl:77 [3] load(::FileIO.Formatted; options::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /home/clyu/.julia/packages/FileIO/ZknoK/src/loadsave.jl:186 [4] load at /home/clyu/.julia/packages/FileIO/ZknoK/src/loadsave.jl:166 [inlined] [5] #load#13 at /home/clyu/.julia/packages/FileIO/ZknoK/src/loadsave.jl:118 [inlined] [6] load at /home/clyu/.julia/packages/FileIO/ZknoK/src/loadsave.jl:118 [inlined] [7] dataset(::String, ::String) at /home/clyu/.julia/packages/RDatasets/WIQKI/src/dataset.jl:12

[bigdataman2015]

solution:

add DataFrames@0.21.2 add RData@0.7.2 add RDatasets