Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Perhaps you could use one of the built-in iterators, such as Array.getRangeIterator <http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/javadoc/ucar/ma2/Array.html#getRangeIterator-java.util.List-> (java.util.List<Range <http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/javadoc/ucar/ma2/Range.html> > ranges) On Thu, Jan 26, 2017 at 7:58 AM, Hanns Holger Rutz <rutz@xxxxxx> wrote: > hi there, > > for the record, i managed to implement an algorithm that solves > this ( > https://stackoverflow.com/questions/41850946/linearly- > reading-a-multi-dimensional-array-obeying-dimensional-sub- > sectioning#41870662 > shows how to generate the sub-ranges within the overall section to be read > ) > > best, .h.h. > > > On 25/01/17 12:20, Hanns Holger Rutz wrote: > > hi there, > > > > I have a scenario where I need to read the entire contents of a > > multi-dimensional section'ed variable piecewise linearly. > > > > for example, say the variable has shape [a][b][c] and I have section'ed > > it as [s1][s2][s3]. say data type is double. now i need to read the > > stream of elements, the total size of which is s1.size * s2.size * > > s3.size in chunks, for example of chunk size x. > > > > the API for variable doesn't allow me to specify "flat" linear indices, > > so I need to calculate intermediate sub-sections, I guess. this looks > > very complicated because the chunk size x might not be a simple multiple > > of s3.size, s2.size*s3.size, etc. > > > > So I can only think of two approaches: read "too" much data and then > > throw away some. Read multiple times; perhaps this problem can be > > formulated in maximally three read calls? > > > > Has anyone solved this somehow? Or is there a trick in the API that I > > haven't seen, to get a linear read command that preserves the offsets > > and strides of sections? > > > > thanks, .h.h. > > > > _______________________________________________ > > NOTE: All exchanges posted to Unidata maintained email lists are > > recorded in the Unidata inquiry tracking system and made publicly > > available through the web. Users who post to any of the lists we > > maintain are reminded to remove any personal information that they > > do not want to be made public. > > > > > > netcdf-java mailing list > > netcdf-java@xxxxxxxxxxxxxxxx > > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > > > > > > _______________________________________________ > NOTE: All exchanges posted to Unidata maintained email lists are > recorded in the Unidata inquiry tracking system and made publicly > available through the web. Users who post to any of the lists we > maintain are reminded to remove any personal information that they > do not want to be made public. > > > netcdf-java mailing list > netcdf-java@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > -- Sincerely, Bob Simons IT Specialist Environmental Research Division NOAA Southwest Fisheries Science Center 99 Pacific St., Suite 255A (New!) Monterey, CA 93940 (New!) Phone: (831)333-9878 (New!) Fax: (831)648-8440 Email: bob.simons@xxxxxxxx The contents of this message are mine personally and do not necessarily reflect any position of the Government or the National Oceanic and Atmospheric Administration. <>< <>< <>< <>< <>< <>< <>< <>< <><
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