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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
> I tried to upload a sample file, the smallest I have is 600mb and I receive > the error that it exceeds the limit. Any suggestions? Thanks, > Shannon > Basically, go to Edit > Formulas > Jython library, and select local jython, and define a simple Jython formula like this: def setPressureValues(fieldimpl) : from jarray import array pressures=array([1000.0, 900.0, 800.0, ....], 'f') ff = GridUtil.setPressureValues(fieldimpl, pressures) return ff finish pressures array assuming you have those values. and then, you can call this from Formula > Grid > Define a grid diagnostic, and type setPressureValues(a) when a window popup, and you should know what to do from here. Yuan > -----Original Message----- > From: Unidata IDV Support [mailto:address@hidden] > Sent: Thursday, May 22, 2014 5:11 PM > To: address@hidden > Cc: address@hidden > Subject: [IDV #ZKB-937399]: z to pressure in wrf > > > > > Can you provide further details on how to do that. I have not used the > > formula functionality of IDV yet and an example would be great. > > Thanks -Shannon > > > > Could you upload a sample file? I would like to try it first and let you know > if it is working. > > http://motherlode.ucar.edu/repository/alias/idvupload > > Yuan > > -----Original Message----- > > From: Unidata IDV Support [mailto:address@hidden] > > Sent: Thursday, May 22, 2014 4:02 PM > > To: address@hidden > > Cc: address@hidden > > Subject: [IDV #ZKB-937399]: z to pressure in wrf > > > > > Thank you Yuan for the swift reply! > > > OK, we have partial success. Your recommendation if using Transect > > > display does yield a vertical scale in both height and pressure. But I > > > do not see how to extract that cross section to netcdf as in the vertical > > > cross section plot (dashboard then calculate vertical cross section then > > > displays then file then save displayed data as netcdf). Can you help with > > > that? Thanks! > > > > > > Shannon > > > > If you want to save a netcdf file with pressure as its vertical coordinate, > > you need to use the formula to do the calculation before the exporting and > > saving data. > > > > > > Yuan > > > > > > -----Original Message----- > > > From: Unidata IDV Support [mailto:address@hidden] > > > Sent: Thursday, May 22, 2014 12:25 PM > > > To: address@hidden > > > Cc: address@hidden > > > Subject: [IDV #ZKB-937399]: z to pressure in wrf > > > > > > > Hi, > > > > > > > > My name is Shannon Davis and I am a researcher at Woods Hole > > > > Oceanographic, and an atmospheric scientist who uses IDV. First, > > > > big fan of the software, and want to pass on my appreciation for a > > > > great job. Second, I have a technical problem I wondered if > > > > anybody could help with. The issue is with some WRF output files > > > > (ncdf). Thus far I have been able to process them, slice and dice > > > > the data as I wished but all in z coordinates. I would like to > > > > transform to pressure coordinates. Specifically, I would like to > > > > extract some vertical cross sections and save them as smaller > > > > netcdf. I have done this already with z vertical coordinates which > > > > seem to load by default in IDV. Any way to do it using pressure as the > > > > vertical coordinate? Thanks for any help! > > > > > > > > > > > > > > > > Shannon > > > > > > > > > > > > > > > Hi Shannon, > > > Thanks for your comment on the IDV, it would be nice if you can provide > > > your successful story of using the IDV in your research and share with > > > the community. > > > > > > For the vertical coordinates, you might try using the Transect display > > > which has the vertical scale in both height and pressure. See the > > > section of the workshop on this at: > > > > > > http://www.unidata.ucar.edu/software/idv/docs/workshop/page_transect > > > vi > > > ews.html > > > > > > Yuan > > > > > > Ticket Details > > > =================== > > > Ticket ID: ZKB-937399 > > > Department: Support IDV > > > Priority: Normal > > > Status: Open > > > > > > > > > > > > > > > Ticket Details > > =================== > > Ticket ID: ZKB-937399 > > Department: Support IDV > > Priority: Normal > > Status: Open > > > > > > > > > Ticket Details > =================== > Ticket ID: ZKB-937399 > Department: Support IDV > Priority: Normal > Status: Open > > > Ticket Details =================== Ticket ID: ZKB-937399 Department: Support IDV Priority: Normal Status: Open