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    Hi Arun,<br>
    <br>
    This is a little tricky to reproduce unless you have installed
    FastRWeb, and then started the FastRWeb server. I'm executing these
    scripts from the browser through a call to FastRWeb running on a
    local port.<br>
    <br>
    Installation is documented here and is quick and straightforward on
    Linux:<br>
    <a href="https://rforge.net/FastRWeb/">https://rforge.net/FastRWeb/</a><br>
    and an example here:<br>
    <a
href="http://jayemerson.blogspot.mx/2011/10/setting-up-fastrwebrserve-on-ubuntu.html">http://jayemerson.blogspot.mx/2011/10/setting-up-fastrwebrserve-on-ubuntu.html</a><br>
    <br>
    I'm using FastRWeb to build a simple web service. As long as I stick
    to data.frame methods, everything works fine and I get the expected
    plots and HTML output in the browser. But calls to data.table
    methods (merge, extract) all seem to default to data.frame, and I
    really don't know how to debug that.<br>
    <br>
    I am copying Simon Urbanek who's the maintainer of FastRWeb, in case
    this is more of a FastRWeb issue.<br>
    <br>
    Here is my session info (I am on CentOS 5 and cannot easily upgrade
    to R 3.0.2).<br>
    <br>
    > sessionInfo()<br>
    R version 2.15.2 (2012-10-26)<br>
    Platform: x86_64-redhat-linux-gnu (64-bit)<br>
    <br>
    locale:<br>
    [1] C<br>
    <br>
    attached base packages:<br>
    [1] stats     graphics  utils     datasets  grDevices methods  
    base     <br>
    <br>
    other attached packages:<br>
     [1] ggmap_2.3          ggplot2_0.9.3.1    RColorBrewer_1.0-5
    raster_2.2-12     <br>
     [5] rgeos_0.3-3        rgdal_0.8-16       sp_1.0-14         
    data.table_1.8.10 <br>
     [9] RJDBC_0.2-3        rJava_0.9-6        DBI_0.2-7         
    rj_1.1.2-3        <br>
    <br>
    loaded via a namespace (and not attached):<br>
     [1] MASS_7.3-23         RJSONIO_1.0-3       RgoogleMaps_1.2.0.5<br>
     [4] colorspace_1.2-4    dichromat_2.0-0     digest_0.6.4       <br>
     [7] grid_2.15.2         gtable_0.1.2        labeling_0.2       <br>
    [10] lattice_0.20-24     mapproj_1.2-2       maps_2.3-6         <br>
    [13] munsell_0.4.2       plyr_1.8            png_0.1-7          <br>
    [16] proto_0.3-10        reshape2_1.2.2      rj.gd_1.1.0-1      <br>
    [19] rjson_0.2.13        scales_0.2.3        stringr_0.6.2      <br>
    [22] tools_2.15.2    <br>
    <br>
    Thanks all!<br>
    --Mel.<br>
    <br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 2/17/2014 6:58 AM, Arunkumar
      Srinivasan wrote:<br>
    </div>
    <blockquote
cite="mid:CAAf756O7Z+_J5Zrmcu3dpNVU6CKaS82Vitd-pPYB1iwUKMDhfA@mail.gmail.com"
      type="cite">
      <div dir="ltr">Mel,
        <div>I'm not able to reproduce this on 1.8.11. Which version are
          you using?</div>
        <div>I'm not aware of this package, and what 'otable' is
          supposed to do. But I get no output while running your script,
          and not the error message as well.</div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On Mon, Feb 17, 2014 at 11:14 AM,
          Bacou, Melanie <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:mel@mbacou.com" target="_blank">mel@mbacou.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000"> Hi,<br>
              <br>
              I am testing an R script using FastRWeb (through Rserve).
              FastRWeb works as expected and I can successfully runs
              Simon Urbanek's examples. Problems arise when I try to
              merge datatables. It seems FastRWeb cannot find <tt>merge.data.table()</tt>.<br>
              <br>
              I'm using plenty of other libraries (ggplot, raster,
              RJDBC, etc.) that execute successfully through FastRWeb
              scripts, so I'm guessing it's something peculiar to
              data.table.<br>
              <br>
              Thanks for any help! --Mel.<br>
              <br>
              <br>
              Here are reproducible examples.<br>
              <br>
              Test #1: the code below (the entire content of my R
              script) SUCCEEDS:<br>
              <br>
              <tt># test1.R</tt><tt><br>
              </tt><tt>library(data.table)</tt><tt><br>
              </tt><tt><br>
              </tt><tt>run <- function(...) {</tt><tt><br>
                  oclear()<br>
              </tt><tt>  d1 <- data.table(a=c(1,2,3),
                b=c("a","b","c"))</tt><tt><br>
              </tt><tt>  d2 <- data.table(e=c("v","a","b"),
                f=c(4,6,7))</tt><tt><br>
              </tt><tt>  otable(d1)</tt><tt><br>
              </tt><tt>  otable(d2)</tt><tt><br>
              </tt><tt>}</tt><br>
              <br>
              This returns a simple web page showing 2 tables:<br>
              <table style="font-family:'Times New
Roman';letter-spacing:normal;text-indent:0px;text-transform:none;word-spacing:0px">
                <tbody>
                  <tr>
                    <td>1</td>
                    <td>a</td>
                  </tr>
                  <tr>
                    <td>2</td>
                    <td>b</td>
                  </tr>
                  <tr>
                    <td>3</td>
                    <td>c</td>
                  </tr>
                </tbody>
              </table>
              <table style="font-family:'Times New
Roman';letter-spacing:normal;text-indent:0px;text-transform:none;word-spacing:0px">
                <tbody>
                  <tr>
                    <td>v</td>
                    <td>4</td>
                  </tr>
                  <tr>
                    <td>a</td>
                    <td>6</td>
                  </tr>
                  <tr>
                    <td>b</td>
                    <td>7</td>
                  </tr>
                </tbody>
              </table>
              <br>
              <br>
              Test #2: the code below (the entire content of my R
              script) FAILS with:<tt><span><br>
                  <tt>Error in `[.default`(x, i) : invalid subscript
                    type 'list'</tt></span></tt><br>
              <br>
              <tt># test2.R<br>
              </tt><tt> library(data.table)</tt><tt><br>
              </tt><tt> </tt><tt><br>
              </tt><tt> run <- function(...) {</tt><tt><br>
                  oclear()<br>
              </tt><tt>   d1 <- data.table(a=c(1,2,3),
                b=c("a","b","c"))</tt><tt><br>
              </tt><tt>   d2 <- data.table(e=c("v","a","b"),
                f=c(4,6,7))</tt><tt><br>
              </tt><tt>   otable(d1)</tt><tt><br>
              </tt><tt>   otable(d2)</tt><tt><br>
              </tt><tt>   setkey(d1, b)</tt><tt><br>
              </tt><tt>   setkey(d2, e)</tt><tt><br>
              </tt><tt>   otable(d1[d2])</tt><tt><br>
              </tt><tt> }</tt><span class="HOEnZb"><font color="#888888"><br>
                  <br>
                  <br>
                  <br>
                  <br>
                  <pre cols="72">-- 
Melanie BACOU
International Food Policy Research Institute
Agricultural Economist, HarvestChoice
Work <a moz-do-not-send="true" href="tel:%2B1%28202%29862-5699" value="+12028625699" target="_blank">+1(202)862-5699</a>
E-mail <a moz-do-not-send="true" href="mailto:mel@mbacou.com" target="_blank">mel@mbacou.com</a>
Visit <a moz-do-not-send="true" href="http://harvestchoice.org" target="_blank">harvestchoice.org</a> </pre>
                </font></span></div>
            <br>
            _______________________________________________<br>
            datatable-help mailing list<br>
            <a moz-do-not-send="true"
              href="mailto:datatable-help@lists.r-forge.r-project.org">datatable-help@lists.r-forge.r-project.org</a><br>
            <a moz-do-not-send="true"
href="https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help"
              target="_blank">https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help</a><br>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
Melanie BACOU
International Food Policy Research Institute
Agricultural Economist, HarvestChoice
Work +1(202)862-5699
E-mail <a class="moz-txt-link-abbreviated" href="mailto:mel@mbacou.com">mel@mbacou.com</a>
Visit harvestchoice.org </pre>
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