<div dir="ltr"><pre>Hello,<br><br>After doing seasonal ave, I also want to do ave from say, 1900-1950.<br><br></pre><pre>Seeking your help.<br></pre><pre>Regards,<br></pre><pre>P<br></pre><pre><br>Try using the time increment option in the ave function like so: d
ave(<variable>,t-1,t+1,12) for monthly data, centered on the middle
month of the season. If your anomaly time series starts with January,
you'd want to start with January of the second year (t=13 for your
data). Note that if any data is missing (say you don't have Dec.), the
average will be computed using whatever months are available.
Hope this helps,
Bill Bua
</pre></div>