<div dir="ltr"><div><div><div><div>Dear all,<br><br></div>I checked, just out of curiosity.<br></div>As far as I understood, the time series on Fig1 are smoothed (spatial) correlation. They call it pattern correlation coefficients (maybe simply: <a href="https://www.ncl.ucar.edu/Document/Functions/Contributed/pattern_cor.shtml">https://www.ncl.ucar.edu/Document/Functions/Contributed/pattern_cor.shtml</a>). So they are correlation coefficients and the threshold level for the 90% significance (cf. caption Fig. 1) are simply the threshold associated with the significance of the correlation (using a 2 tailed t-test with n-2, maybe simply: <a href="https://www.ncl.ucar.edu/Document/Functions/Built-in/rtest.shtml">https://www.ncl.ucar.edu/Document/Functions/Built-in/rtest.shtml</a>).<br></div>I hope this helps.<br><br></div>Serena<br><br><div><div><div><div><div><div><div><div><div dir="ltr" class="gmail-m_318167237185272650gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>.¸. , . .·´¯`·<br> ><(((º>     `·.¸.·´¯`·...¸><(((º>¸.¸. , . .·´¯`· ><(((º> .<br>`·.¸.·´¯`·...¸><(((º>                                                  .<br>                                                                              .<br>  Serena ILLIG-THEVENIN       LEGOS/IRD       .</div>
<div> <span>                                                                          .</span> <br>             <span>University of Cape Town - UCT          .<br></span><span><span>             Department of Oceanography           .</span></span><br><span><span><span>             Private Bag X3, Rondebosch  7701   .<br></span></span>             </span>SOUTH AFRICA                                  .<br>                                                                            .<br>   E-mail     : <i><a href="mailto:serena.illig@ird.fr" target="_blank">serena.illig@ird.fr</a> </i>                           .</div><div>   Web-site : <a href="http://sillig.free.fr" target="_blank">http://sillig.free.fr </a>                            .<br>   Fax         : +27 21 650 3979  <span style="background-color:rgb(255,255,255);color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"></span>                        .</div>
<div>                                                                    .<br>                                                 <º)))><..·´</div><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div></div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Aug 9, 2018 at 8:08 AM Morteza Qadimi <<a href="mailto:mqadimi@yahoo.com" target="_blank">mqadimi@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px"><span><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px"><div><span style="font-family:Helvetica,Arial,sans-serif">Hi,</span><br clear="none"></div><div><span style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></span></div></div><div class="m_318167237185272650m_2005751977430415196ydp738354f0yiv1900104557ydpdb942961yahoo_quoted" id="m_318167237185272650m_2005751977430415196ydp738354f0yiv1900104557ydpdb942961yahoo_quoted_4086371675" style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px"><div style="font-size:13px"><div id="m_318167237185272650m_2005751977430415196ydp738354f0yiv1900104557ydpdb942961yiv6697017135"><div style="font-size:16px"><div style="font-family:Helvetica,Arial,sans-serif">I need to separate CP and EP El Ni<span><span style="color:rgb(0,0,0);font-family:Helvetica,Arial,sans-serif;font-size:16px;text-align:center">ñ</span></span>o years by the method used in a paper (<i>A new method to classify ENSO events into eastern and central Pacific types)</i>. I have obtained an (1D) EOF-based pattern correlation coefficient array (say EPC1). Then the author says: </div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="text-align:center;font-family:Helvetica,Arial,sans-serif">" The EP type El Niño is defined as the case when the EPC1 index is equal to or greater than 0.79 which is significant at the 90% confidence level from the two-tailed Student’s t-test."</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">How author has calculated 0.79? Does NCL has a function for that? It has been 2 weeks i am asking for a solution. please help me.</div></div></div></div></div></span></div></div></div></div>_______________________________________________<br>
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