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    Once again, you cannot compare R factors calculated using different
    sets of data.<br>
    Pavel<br>
    <br>
    <div class="moz-cite-prefix">On 2/6/15 11:48 AM, Guangyu Zhu wrote:<br>
    </div>
    <blockquote cite="mid:D0FA8371.1240%25gzhu@hwi.buffalo.edu"
      type="cite">
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      <div>That�s how I think. But say if I+ is exactly same as I-, I
        use it twice. I got much lower R and Rfree, that means better
        fit. Isn�t good? And I�m also curious why.</div>
      <div><br>
      </div>
      <div>Guangyu</div>
      <div><br>
      </div>
      <span id="OLK_SRC_BODY_SECTION">
        <div style="font-family:Calibri; font-size:11pt;
          text-align:left; color:black; BORDER-BOTTOM: medium none;
          BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT:
          0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;
          BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span
            style="font-weight:bold">From: </span> Pavel Afonine &lt;<a
            moz-do-not-send="true" href="mailto:pafonine@lbl.gov">pafonine@lbl.gov</a>&gt;<br>
          <span style="font-weight:bold">Date: </span> Friday, February
          6, 2015 at 2:29 PM<br>
          <span style="font-weight:bold">To: </span> Guangyu Zhu &lt;<a
            moz-do-not-send="true" href="mailto:gzhu@hwi.buffalo.edu">gzhu@hwi.buffalo.edu</a>&gt;,
          "<a moz-do-not-send="true"
            href="mailto:phenixbb@phenix-online.org">phenixbb@phenix-online.org</a>"
          &lt;<a moz-do-not-send="true"
            href="mailto:phenixbb@phenix-online.org">phenixbb@phenix-online.org</a>&gt;<br>
          <span style="font-weight:bold">Subject: </span> Re:
          [phenixbb] refinement with anomalous data<br>
        </div>
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        <div>
          <div bgcolor="#FFFFFF" text="#000000">
            If data set isn't anomalous then I don't see why you would
            want to refine against I+/I-.<br>
            Pavel<br>
            <br>
            <div class="moz-cite-prefix">On 2/6/15 11:26 AM, Guangyu Zhu
              wrote:<br>
            </div>
            <blockquote cite="mid:D0FA7CEB.1226%25gzhu@hwi.buffalo.edu"
              type="cite">
              <div>What I meant is: I actually don�t have anomalous
                signal, so when I use I+/I-, kind of like I use Imean
                twice for each reflection. Can I do that? �My guess is
                that the resolution is low, so double
                reflection/parameter ratio really benefits the
                refinement, although overall the weight for x-ray term
                is not change, because rms bond and angle are similar.</div>
              <div><br>
              </div>
              <div>Newer versions are better for my other refinement
                with higher resolution, but not this data set.</div>
              <div><br>
              </div>
              <div>Guangyu</div>
              <div><br>
              </div>
              <span id="OLK_SRC_BODY_SECTION">
                <div style="font-family:Calibri; font-size:11pt;
                  text-align:left; color:black; BORDER-BOTTOM: medium
                  none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in;
                  PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP:
                  #b5c4df 1pt solid; BORDER-RIGHT: medium none;
                  PADDING-TOP: 3pt"><span style="font-weight:bold">From:
                  </span>Pavel Afonine &lt;<a moz-do-not-send="true"
                    href="mailto:pafonine@lbl.gov">pafonine@lbl.gov</a>&gt;<br>
                  <span style="font-weight:bold">Date: </span>Friday,
                  February 6, 2015 at 2:12 PM<br>
                  <span style="font-weight:bold">To: </span>Guangyu Zhu
                  &lt;<a moz-do-not-send="true"
                    href="mailto:gzhu@hwi.buffalo.edu">gzhu@hwi.buffalo.edu</a>&gt;,
                  "<a moz-do-not-send="true"
                    href="mailto:phenixbb@phenix-online.org">phenixbb@phenix-online.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:phenixbb@phenix-online.org">phenixbb@phenix-online.org</a>&gt;<br>
                  <span style="font-weight:bold">Subject: </span>Re:
                  [phenixbb] refinement with anomalous data<br>
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                    <blockquote
                      cite="mid:D0FA7A55.1219%25gzhu@hwi.buffalo.edu"
                      type="cite">
                      <div>I use same data set for refinement, so Rfree
                        is also marked for same reflection. The only
                        difference is that I chose �Data labels� from
                        Phenix IMEAN or I(+) I(-).
                      </div>
                    </blockquote>
                    <br>
                    What I meant is that the IMEAN set is not the same
                    as I(+),I(-) at least because the number of
                    reflections in IMEAN is not the same as in
                    I(+),I(-).<br>
                    <br>
                    <blockquote
                      cite="mid:D0FA7A55.1219%25gzhu@hwi.buffalo.edu"
                      type="cite">
                      <div>By the way, I use version 1.8.2 for
                        refinement. Newer versions gives higher R/Rfree.
                      </div>
                    </blockquote>
                    <br>
                    Should be the other way around...<br>
                    <br>
                    Pavel<br>
                    <br>
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