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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Yes, good catch. I don’t think it’s necessarily even a copy-paste error – it’s more likely my brain just hiccupped in the process of typing out all the 1s and
2s….<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Anyway, fixed in 3.2.21<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">best<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Andrew.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cwb-bounces@sslmit.unibo.it [mailto:cwb-bounces@sslmit.unibo.it]
<b>On Behalf Of </b>Mildenberger Thoralf (mild)<br>
<b>Sent:</b> 03 July 2016 14:23<br>
<b>To:</b> cwb@sslmit.unibo.it<br>
<b>Subject:</b> [CWB] Bug in Confidence Interval filter for keyowords using Log Ratio<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">Dear developers,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">I tired to reproduce the confidence intervals for the Log Ratio for the keywords function in
<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">CQPweb 3.1.16 myself (in R) and failed. Subsequently, when trying to figure out the formula that is used from the source code (3.2.11), I found the following line in the file "lib/keywords.inc.php":<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">$fragment_CIhalf = "($Z_unit * SQRT( ($O12 / ($R1 * IF($O11 > 0, $O11, 0.5))) + ($O22 / ($R2 * IF($O11 > 0, $O11, 0.5))) ))";<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">shouldn't that be:
<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">$fragment_CIhalf = "($Z_unit * SQRT( ($O12 / ($R1 * IF($O11 > 0, $O11, 0.5))) + ($O22 / ($R2 * IF($O21 > 0, $O21, 0.5))) ))";<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">I guess the second IF($O11 > 0, $O11, 0.5) is a copy-paste error and should really be IF($O21 > 0, $O21, 0.5) as the proportion of "word" in the second corpus should be used. The source code is
version 3.2.11, but the code is consistent with the results displayed by 3.1.16.
<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">Best,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black">Thoralf<o:p></o:p></span></p>
<p><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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