Home/ Questions/Quick handling of the unimplemented type 'list' in 'encodeelement' error
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Phoenix Tremblay
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Asked: 2022-05-18T20:28:11+00:00 In:

Quick handling of the unimplemented type ‘list’ in ‘encodeelement’ error

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Here is the program I run:

> head(output)
  Id Title IsProhibited
 1 10000074 Renault Logan, 2005 0
 2 10000124 Ñêëàäñêîå ïîìåùåíèå, 345 ì<U+00B2> 0
 3 10000175 Ñó-øåô 0
 4 10000196 3-ê êâàðòèðà, 64 ì<U+00B2>, 3/5 ýò. 0
 5 10000387 Samsung galaxy S4 mini GT-I9190 (÷¸ðíûé) 0
 6 10000395 Êàðòèíà ""Êðûì. Ïîñåëîê Àðîìàò"" (õîëñò, ìàñëî) 0
> write.table(output, 'output.csv', sep = ',', row.names = FALSE, append = T)
toString(output$Title)
> class(output)
 [1] "data.frame"
 > class(output$Id)
 [1] "integer"
 > class(output$Title)
 [1] "list"
 > class(output$IsProhibited)
 [1] "factor"
> output$Title[0:3]
 [[1]]
 [1] "Renault Logan, 2005"
 
 [[2]]
 [1] "Складское помещение, 345 м²"
 
 [[3]]
 [1] "Су-шеф"
Id Title IsProhibited 
 10000074 Renault Logan, 2005 0 
 10000124 СкладÑкое помещение, 345 м<U+00B2> 0 
 10000175 Су-шеф 0 
 10000196 3-к квартира, 64 м<U+00B2>, 3/5 ÑÑ‚. 0 
 10000387 Samsung galaxy S4 mini GT-I9190 (чёрный) 0 
 10000395 Картина "Крым. ПоÑелок Ðромат"" (холÑÑ‚ маÑло)" 0
 10000594 КальÑн 25 Ñм 0 
 10000612 1-к квартира, 45 м<U+00B2>, 6/17 ÑÑ‚. 0 
 10000816 Гараж, 18 м<U+00B2> 0 
 10000831 Платье 0 
 10000930 Карбюраторы К-22И, К-22Г от газ 21 и газ 51 0

After I run, it returns an error:

Error in .External2(C_writetable, x, file, nrow(x), p, rnames, sep, eol, : 
 unimplemented type 'list' in 'EncodeElement'
 In addition: Warning message:
 In write.table(output, "output.csv", sep = ",", row.names = FALSE, :
  appending column names to file

Does anyone have any suggestions for the problem below: unimplemented type ‘list’ in ‘encodeelement’ in the r. How to correct it?

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2 Answers

  1. Best Answer
    Expert

    The cause: When you provide a list to a function that needs a vector, this error unimplemented type ‘list’ in ‘encodeelement’ occurs.

    Solution:

    You may do the following to obtain your list as a character vector:

    output$Title <- vapply(output$Title, paste, collapse = ", ", character(1L))

    If you were interested in trying with the unlist method, you could “expand” every other row by the distinct values in output$Title, as seen below:

    x <- vapply(output$Title, length, 1L) ## How many items per list element
output <- output[rep(rownames(output), x), ] ## Expand the data frame
output$Title <- unlist(output$Title, use.names = FALSE) ## Replace with raw values
    • 0

  2. This is regardless of how many columns are available: 

    df <- apply(df,2,as.character)

    write.csv is your next step

    • 15

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