This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
> Dears: > > I are using IDV unidata catalog to access NCEP NOMADS NOAA server > motherlode list Gfs 0.25 ETC...... > > Why i cant use any formulas as change unit, or when i chosse apcpsfc value > is missing or i cant graf accumulated formula as you see.. > > I am doing something wrong? surely.... > > Thanks from Patagonia > > Fernando Frassetto > > Forcaster AIC > > > [image: Imágenes integradas 1] > > Hi Fernando, I am guessing the problem is that there is a missing value over the time (or invalid value), so the summation will only return the missing as result. You need to tell me exactly what you were doing here. Yuan Ticket Details =================== Ticket ID: XNS-177888 Department: Support IDV Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.