rdata.tablecolon-equals

R - Error in `:=`(variable, as.character(variable))

I'm trying to run an R script, which can be found here with the command plot_trace.R -m ./log.model.csv ./log.trace.csv.

The two csv files can be found here.

This produces the error:

Error in `:=`(variable, as.character(variable)) : 
  Check that is.data.table(DT) == TRUE. Otherwise, := and `:=`(...) are defined for use in j, once only and in particular ways. See help(":=").
Calls: [ -> [.tbl_df -> check_names_df -> :=

Last but not least my sessionInfo() output:

R version 3.4.4 (2018-03-15)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.3 LTS

Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.4.4

Thanks

Solution

  • UPDATE

    I found two problems with this script:

    Below are the lines I changed to fix the script, using R version 3.6.1 and tidyr version 1.0.0:

    Original answer

    I was able to run the script on the data you provided without error. Both

    Rscript --vanilla plot_trace.R -m ./log.model.csv ./log.trace.csv

    and 

    chmod +x plot_trace.R
./plot_trace.R -m ./log.model.csv ./log.trace.csv

    produced the following plot:

    Result plot

    Can you run the script step by step in RStudio to check the class of trace.df after each step?