Dear gradsusrs,<br><br>I want to produce the average of several irregular lists of time stamps for u and v wind. Now I know that normally one can use d ave(u,time=00Z01JAN1985,time=00Z01JAN1990) for example but I want to consider only the dates listed below. How can I do this?<br>

<br>00Z01AUG1984<br>00Z01OCT1986<br>00Z01DEC1989<br>00Z01JUL1990<br>00Z01DEC1992<br>00Z01FEB1993<br>00Z01FEB1994<br>00Z01JUN1995<br>00Z01APR1998<br>00Z01SEP1998<br>00Z01MAY2001<br>00Z01JUN2001<br>00Z01NOV2007<br>00Z01APR2008<br>

00Z01NOV2008<br>00Z01FEB2009<br>00Z01JUL2009<br><br><br>Regards,<br><br>James<br>