[netCDFJava #UMY-837124]: reading data into Array from Variable

No problem! :-) Happy netCDF'ing!

> Hi Sean,
> 
> Thanks for the response. I guess I thought the netcdf info was begin saved
> to ncfile and then it was ok to close it. Thanks again!
> 
> -John
> 
> address@hidden> wrote:
> 
> > Greetings John,
> >
> > Sorry for the delay. It looks like you are closing the netCDF file before
> > you try to read in the variable. If you move
> >
> > makeLatLonGrid(ncfile);
> >
> > just beneath the netCDF open command, in the`try` block of main, then it
> > works great:
> >
> > 'public static void main(String[] args){
> > '    String filename = "~/20090513-204500.netcdf.gz";
> > '    NetcdfFile ncfile = null;
> > '    try {
> > '        ncfile = NetcdfFile.open(filename);
> > '        makeLatLonGrid(ncfile);
> > '    } catch (IOException ioe) {
> > '        log("trying to open " + filename, ioe);
> > '    } finally {
> > '        if (null != ncfile) try {
> > '            ncfile.close();
> > '        } catch (IOException ioe) {
> > '            log("trying to close " + filename, ioe);
> > '        }
> > '    }
> > '}
> >
> > Cheers!
> >
> > Sean
> >
> > > Hi Sean,
> > >
> > > Here is my code. I modified it quite a bit so that it should compile for
> > > you. I attached the data file as well, if that helps. It's probably
> > > something simple I'm doing/failing to do. Thanks for your help!
> > > -John
> > >
> > > *******************
> > > package edu.ou.asgbook.segmentation;
> > >
> > > import java.io.*;
> > > import ucar.nc2.*;
> > > import ucar.ma2.*;
> > >
> > > public class read_netcdf {
> > > private static void log(String msg, IOException ioe){
> > > System.out.println(msg + ioe.getMessage());
> > > }
> > > private static void makeLatLonGrid(NetcdfFile netcdf){
> > > Variable var = netcdf.findVariable("goesnp_ctype_emiss11_high");
> > > System.out.println(var.getUnitsString());
> > > Array arr = null;
> > > try {
> > > arr = var.read();
> > > } catch (IOException e) {
> > > log("trying to read the variable. ",e);
> > > e.printStackTrace();
> > > }
> > > }
> > > public static void main(String[] args){
> > > String filename = "~/20090513-204500.netcdf.gz";
> > > NetcdfFile ncfile = null;
> > > try {
> > > ncfile = NetcdfFile.open(filename);
> > > } catch (IOException ioe) {
> > > log("trying to open " + filename, ioe);
> > > } finally {
> > > if (null != ncfile) try {
> > > ncfile.close();
> > > } catch (IOException ioe) {
> > > log("trying to close " + filename, ioe);
> > > }
> > > }
> > > makeLatLonGrid(ncfile);
> > > }
> > > }
> > >
> > > *******************
> > >
> > > address@hidden> wrote:
> > >
> > > > Greetings John,
> > > >
> > > > Would you mind sending the code you wrote, at least the part where you
> > > > begin to open the dataset through the point of error?
> > > >
> > > > Thanks!
> > > >
> > > > Sean
> > > >
> > > > > Hello,
> > > > >
> > > > > I have the latest version of Java and the NetCDF Java library version
> > > > 4.2.
> > > > > I'm simply trying to read in a variable from a netcdf file. I can
> > make a
> > > > > Variable just fine and extract info (e.g. var name, data type), but
> > then
> > > > > when I try to make an Array out of it with read(), (e.g. arr =
> > var.read()
> > > > > ), I get the runtime error, "BAD: missing spi:" then the variable
> > name. I
> > > > > can get attributes just fine, and the shape and type of the data are
> > > > what I
> > > > > expect. I view the data in ncview, and it looks fine. A co-worker
> > loaded
> > > > it
> > > > > up in McIDAS - V and the log message said: "ucar.nc2.NetcdfFile -
> > Using
> > > > > IOSP ucar.nc2.iosp.netcdf3.N3raf" if that's pertinent at all. I
> > think I'm
> > > > > importing all of the proper libraries since I'm not getting a
> > compiler
> > > > > error, but I'm fairly new to Java, so there could be something I'm
> > > > missing.
> > > > > Any help is much appreciated! Let me know if you'd like more info.
> > > > >
> > > > > Thanks,
> > > > > John
> > > > >
> > > > >
> > > > > --
> > > > >
> > > >
> > ---------------------------------------------------------------------------------------
> > > > > John Cintineo
> > > > > Research Meteorologist
> > > > > SSEC/CIMSS
> > > > > University of Wisconsin -- Madison
> > > > > 1225 W. Dayton St.
> > > > > Madison, WI 53706
> > > > >
> > > > > (608) 890-0619
> > > > > john.cintineo@ <address@hidden>ssec.wisc.edu
> > > > >
> > > > > "My opinions are my own and not representative of
> > > > > CIMSS, SSEC, NOAA or any affiliates"
> > > > >
> > > > >
> > > >
> > > >
> > > > Ticket Details
> > > > ===================
> > > > Ticket ID: UMY-837124
> > > > Department: Support netCDF Java
> > > > Priority: High
> > > > Status: Open
> > > >
> > > >
> > >
> > >
> > > --
> > >
> > ---------------------------------------------------------------------------------------
> > > John Cintineo
> > > Research Meteorologist
> > > SSEC/CIMSS
> > > University of Wisconsin -- Madison
> > > 1225 W. Dayton St.
> > > Madison, WI 53706
> > >
> > > (608) 890-0619
> > > john.cintineo@ <address@hidden>ssec.wisc.edu
> > >
> > > "My opinions are my own and not representative of
> > > CIMSS, SSEC, NOAA or any affiliates"
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: UMY-837124
> > Department: Support netCDF Java
> > Priority: Emergency
> > Status: Open
> >
> >
> 
> 
> --
> ---------------------------------------------------------------------------------------
> John Cintineo
> Research Meteorologist
> SSEC/CIMSS
> University of Wisconsin -- Madison
> 1225 W. Dayton St.
> Madison, WI 53706
> 
> (608) 890-0619
> john.cintineo@ <address@hidden>ssec.wisc.edu
> 
> "My opinions are my own and not representative of
> CIMSS, SSEC, NOAA or any affiliates"
> 
> 


Ticket Details
===================
Ticket ID: UMY-837124
Department: Support netCDF Java
Priority: Emergency
Status: Open