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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Bill- > Okay, Don, almost there. It was easy to add -9999 to all the empty cells in > the Excel file. Now IDV is happy with the file and will plot the data. > However, look at the attached capture. The missing T and Td with -9999 in the > file is showing up on the plot as -17966. I changed the plot model to display > the peak wind speed in the upper right of the plot and if the peak wind speed > is missing (-9999) it plots -19436.5. Can I filter the -9999 from the plot - > I tried but didn't get the desired results. Is that because the values are no > longer -9999 but have been converted from Did you add the miss="-9999" to the header for each variable? If so, then you should never see the missing data. It should get converted to NaN (not a number). The reason the values are different than -9999 is because of unit conversion. If you've put in the missing flag but it's not using that correctly, send me the sample csv file and I'll look into it. Don Ticket Details =================== Ticket ID: WRY-586577 Department: Support IDV Priority: Normal Status: Open