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CONTEXT:

  • Windows XP R 3.1.3 data.table package 1.9.5 (dev.)
  • Rtools 3.1
  • installed libraries data.table, RCurl installed certificate bundle
  • and .pem file in RCurl directory, including it in Windows PATH

I'm trying to replicate basic fread() usage.

I was getting SSL certificate error although download.file() works fine with the same URL. Therefore I followed recommendations as shown in stack overflow:

How to use fread() with "https" url scheme?

Now data.table 1.9.5 is installed. I do not get SSL error anymore but find error:

Error in fread("https://raw.githubusercontent.com/wiki/arunsrinivasan/flights/NYCflights14/flights14.csv", : showProgress must be 0 or 1, currently

Here is exactly what I typed in RStudio:

library (data.table)
setInternet2()
options(RCurlOptions = list(cainfo = system.file("CurlSSL", "cacert.pem", package = "RCurl")))
flights <- fread("https://raw.githubusercontent.com/wiki/arunsrinivasan/flights/NYCflights14/flights14.csv")

I also tried forcing showProgress=TRUE or FALSE but still get same error.

Community
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Manel Navarro
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  • Just checked again and the problem seems to be with fread() in version 1.9.5 and .csv files. – Manel Navarro Apr 12 '15 at 14:36
  • I also had this problem using `fread` from `dev` version on Windows 8.1 x64 (see my comments under Richard's answer http://stackoverflow.com/questions/29499145/can-i-prevent-data-tables-fread-column-class-inference-getting-overridden-by-tr) – user2957945 Apr 12 '15 at 14:47
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    There's already a bug report [here](https://github.com/Rdatatable/data.table/issues/1111). I've tested on windows 8.1, and not able to reproduce.. Could you post your `sessionInfo()` output, and also re-run with `verbose=TRUE`? Also, what does `getOption("datatable.showProgress")` return? – Arun Apr 12 '15 at 14:57
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    @Arun; please excuse previous comment...I just retried the `dev` version on W8.1 and fread works as expected. 5 days ago i had the same issue as reported in the bug (and OP).... now its ok. – user2957945 Apr 12 '15 at 15:12
  • @user2957945, good to know, thanks. Manel, just tried on windows XP as well.. with the exact code you've shown.. can't reproduce the error :-(. – Arun Apr 12 '15 at 15:40

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