<html><head></head><body><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></div>
<div><span style="font-family: Helvetica, Arial, sans-serif; color: rgb(38, 40, 42);">Hi,</span><br></div><div><span style="font-family: Helvetica, Arial, sans-serif; color: rgb(38, 40, 42);"><br></span></div></div><div id="ydpdb942961yahoo_quoted_4086371675" class="ydpdb942961yahoo_quoted"><div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;"><div><div id="ydpdb942961yiv6697017135"><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;"><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;">I need to separate CP and EP El Nino years from 1979-2016 by the method used in "<i>A new method to classify ENSO events into eastern and central Pacific types</i>". I've calculated EOF and pattern correlation coefficient as mentioned in the paper. I've obtained a 1D array (Say EPC1 Index) which is the 1st pattern correlation coefficient. The author says about the EPC:</div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><br></div><div style="text-align: center; font-family: Helvetica, Arial, sans-serif; font-size: 16px;" dir="" data-setdir="true">" 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;font-size:16px;"><br></div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;">How can i calculate 0.79 for my own data? I saw the "<strong style="font-family:courier;font-size:13.3333px;white-space:pre-wrap;margin:0px;padding:0px;">student_t</strong><span style="font-family:courier;font-size:13.3333px;white-space:pre-wrap;">(t, df)</span>" function of NCL. Should i use this function? if yes, what are t and df variables? is t = EPC1? so what is df array?</div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><br></div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;">Sincerely,</div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;">Morteza</div></div></div></div></div></div>
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