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Below is my DTM type data set:

View(sms_dtm_freq_train) sms_dtm_freq_train[["dimnames"]] $Docs [1] "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14"
[15] "15" "16" "17" "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28"
[29] "29" "30" "31" "32" "33" "34" "35" "36" "37" "38" "39" "40" "41" "42"
[43] "43" "44" "45" "46" "47" "48" "49" "50" "51" "52" "53" "54" "55" "56"
[57] "57" "58" "59" "60" "61" "62" "63" "64" "65" "66" "67" "68" "69" "70"
[71] "71" "72" "73" "74" "75" "76" "77" "78" "79" "80" "81" "82" "83" "84"
[85] "85" "86" "87" "88" "89" "90" "91" "92" "93" "94" "95" "96" "97" "98"
[99] "99" "100" "101" "102" "103" "104" "105" "106" "107" "108" "109" "110" "111" "112" .......... [ reached getOption("max.print") -- omitted 4057 entries ]

$Terms [1] "â£wk" "…" "–" "abiola" "abl" "abt"
[7] "accept" "access" "account" "across" "activ" "actual"
[13] "add" "address" "admir" "adult" "advanc" "aft"
[19] "afternoon" "aftr" "age" "ago" "ahead" "aight"
[25] "aint" "air" "aiyah" "alex" "almost" "alon"
[31] "alreadi" "alright" "alrit" "also" "alway" "amp"
[37] "angri" "announc" "anoth" "answer" "anybodi" "anymor"
[43] "anyon" "anyth" "anytim" "anyway" "apart" "app"
[49] "appli" "appoint" "appreci" "april" "ard" "area"
[55] "argument" "arm" "around" "arrang" "arrest" "arriv"
[61] "asap" "ask" "askd" "asleep" "ass" "attempt"
[67] "auction" "avail" "ave" "avoid" "await" "award"
[73] "away" "awesom" "babe" "babi" "back" "bad"
[79] "bag" "bak" "balanc" "bank" "bare" "bath"
[85] "batteri" "bcoz" "bcum" "bday" "beauti" "becom"
[91] "bed" "bedroom" "begin" "believ" "belli" "best"
[97] "better" "bid" "big" "bill" "bird" "birthday"
..............

[ reached getOption("max.print") -- omitted 1057 entries ]

When i run:

sms_train <- apply(sms_dtm_freq_train, MARGIN = 2, convert_counts)

I got the error messages below:

Error in apply(sms_dtm_freq_train, MARGIN = 2, convert_counts) : dim(X) must have a positive length

I type the same codes as the text book "Machine Learning with R" 's , but i got the errors. I am very confused. Anyone can help me solve this problem ? Thanks!

Frank Lee
  • 1
  • can you `dput` your objects for reproducibility please. also see https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example – Bulat Sep 28 '19 at 13:52
  • try `apply(as.data.frame(sms_dtm_freq_train), MARGIN = 2, convert_counts)` or `apply(as.matrix(sms_dtm_freq_train), MARGIN = 2, convert_counts)`. The problem seems to be the data structure of `sms_dtm_fre_train`. `dim(sms_dtm_freq_train)` should output the number of rows and columns. – NewUser Sep 28 '19 at 14:17

0 Answers0