<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hi, <br></div><div> I am trying to calculate <span class="gmail-gr_ gmail-gr_81 gmail-gr-alert gmail-gr_gramm gmail-gr_inline_cards gmail-gr_run_anim gmail-Grammar gmail-only-ins gmail-replaceWithoutSep" id="gmail-81">the mean</span> of the same variable from four <span class="gmail-gr_ gmail-gr_123 gmail-gr-alert gmail-gr_spell gmail-gr_inline_cards gmail-gr_run_anim gmail-ContextualSpelling gmail-ins-del gmail-multiReplace" id="gmail-123">different</span> datasets of the same spatial(grid) and temporal resolution.<br></div><div>I want to do this in such a way so that the dividing count value at every grid point equal to <span class="gmail-gr_ gmail-gr_576 gmail-gr-alert gmail-gr_gramm gmail-gr_inline_cards gmail-gr_run_anim gmail-Grammar gmail-only-ins gmail-doubleReplace gmail-replaceWithoutSep" id="gmail-576">the number</span> of the dataset which <span class="gmail-gr_ gmail-gr_337 gmail-gr-alert gmail-gr_gramm gmail-gr_inline_cards gmail-gr_run_anim gmail-Grammar gmail-multiReplace" id="gmail-337">has</span> do</div><div>not have undefined values at that grid point. </div><div><br data-mce-bogus="1"></div><div>Any help will be highly appreciated. <br data-mce-bogus="1"></div><div><br></div><div data-marker="__SIG_POST__">-- <br></div><div>Manas Prem Gautam<br>K. Banerjee Center of Atmospheric and Ocean Studies<br>University Of Allahabad, Allahabad,<br>Uttar Pradesh, India - 211004<br>Email: mpgautam@allduniv.ac.in<br></div></div></body></html>