<div dir="ltr"><div><a href="http://www.ncl.ucar.edu/Document/Functions/Contributed/calculate_daily_values.shtml"><b>calculate_daily_values</b></a></div><div><br></div><div>This is 'calendar aware'<br> time:calendar = "noleap" ;<br> =================<br></div><div> f = addfile("...","r")</div><div> x = f->pr <br></div><div> nDim = 0<br></div><div> xDayAvg = <strong>calculate_daily_values</strong>(x, "avg", nDim, False)
</div><div><pre> ;xDaySum = <strong>calculate_daily_values</strong>(x, "sum", nDim, False)
;xDayMin = <strong>calculate_daily_values</strong>(x, "min", nDim, False)
;xDayMax = <strong>calculate_daily_values</strong>(x, "max", nDim, False)
</pre></div><div> <b>printVarSummary</b>(xDayAvg)</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 13, 2019 at 10:54 AM Xueyan Zhang via ncl-talk <<a href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi ncl_talk,<div><br></div><div>I have a variable like this:</div><div>dimensions:<br> time = 2920 ;<br> lat = 224 ;<br> lon = 464 ;<br>variables:<br> float time(time) ;<br> time:calendar = "noleap" ;<br> time:long_name = "observation time" ;<br> time:units = "days since 2098-01-01 00:00:00" ;<br> float lat(lat) ;<br> lat:long_name = "latitude " ;<br> lat:units = "degrees_north " ;<br> float lon(lon) ;<br> lon:long_name = "longitude " ;<br> lon:units = "degrees_east " ;<br> float pr(time, lat, lon) ;<br> pr:long_name = "Precipitation" ;<br> pr:units = "mm" ;<br> pr:_FillValue = 1.e+20f ;<br></div><div><br></div><div>the time value is 0,0.125..364.875</div><div>I want to calculate the mean value of pr among time dimension but using every 8 time index, like pr_mean (0) = (pr(0,:,:)+
pr(1,:,:)+
pr(2,:,:)+
pr(3,:,:)+
pr(4,:,:)+
pr(5,:,:)+
pr(6,:,:)+
pr(7,:,:))/8</div><div><br></div><div>I only thought about using loops but it is too slow. Any ideas?</div><div><br></div><div>Thanks!</div><div><br></div><div>Xueyan</div></div>
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