Correction: ?options (not par) -- Sent from my phone. Please excuse my brevity.
On July 7, 2016 3:26:06 PM PDT, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: >Same as with any floating point numeric computation environment... you >don't. There is always uncertainty in any floating point number... it >is just larger in this data than you might be used to. > >Once you get to the stage where you want to output values, read up on > >?round >?par (digits) > >and don't worry about the incidental display of extra digits prior to >presentation (output). >-- >Sent from my phone. Please excuse my brevity. > >On July 7, 2016 12:50:54 AM PDT, Ismail SEZEN <sezenism...@gmail.com> >wrote: >>Hello, >> >>I use ncdf4 and ncdf4.helpers packages to get wind data from ncep/ncar >>reanalysis ncetcdf files. But data is in the form of (9.199998, >>8.799998, 7.999998, 3.099998, -6.8000018, …). I’m aware of precision >>and least_significant_digit attributes of ncdf4 object [1]. For uwnd >>data, precision = 2 and least_significant_digits = 1. My doubt is that >>should I round data to 2 decimal places or 1 decimal place after >>decimal point? >> >>Same issue is valid for some header info. >> >>Output of ncdf4 object: >> >> >>Output of ncdump on terminal: >> >> >>for instance, ncdump's scale factor is 0.01f but ncdf4 object’s >>scale_factor is 0.00999999977648258. You can notice same issue for >>actual_range and add_offset. Also a similar issue exist for the data. >>How can I truncate those extra unsignificant decimal places or round >>the numbers to significant decimal places? >> >>1 - >>http://www.esrl.noaa.gov/psd/data/gridded/conventions/cdc_netcdf_standard.shtml >><http://www.esrl.noaa.gov/psd/data/gridded/conventions/cdc_netcdf_standard.shtml> >>______________________________________________ >>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>https://stat.ethz.ch/mailman/listinfo/r-help >>PLEASE do read the posting guide >>http://www.R-project.org/posting-guide.html >>and provide commented, minimal, self-contained, reproducible code. > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
