Thanks for the insight. I had downloaded a version last week, but the
project was still pointing to an older version that was downloaded earlier
in the year. I cleaned up everything, and reset the class path
appropriately and all is working beautifully.
Cheers,
Susan
On 5/25/12 1:13 PM, "Peter Cao" <x...@hdfgroup.org> wrote:
>There was a problem for HDF4 SDS on 64-bit mac machines.
>The problem was fixed two months ago. But the problem
>should not happen on linux machines. If you installed HDFView
>2.8 over two months ago, could you download it and try it?
>
>
>On 5/25/2012 12:23 PM, summerhaze wrote:
>> Hi -
>>
>> I've been trying to figure out how to read data using the hdf-java
>>without
>> success. All data values returned are zero. Thinking the data was
>>somehow
>> corrupted, I validated the file by writing an equivalent C program, and
>>then
>> looked at the data using hdfview.
>>
>> After validating, I decided to try the TestH4File.java example, running
>>the
>> "testH4SDS" test, and --- got the same result. All values output are
>>zero
>> (and should not be).
>>
>> I've tried this on both my Mac (Lion) and on an Ubuntu 11 box. I'm
>>using
>> hdf-java 2.8 and java 1.6 (64b).
>>
>> Any insights are appreciated.
>> Thanks,
>> Susan
>>
>> === output ===
>>
>> Julian Date and Time
>> _FillValue
>> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
>> Longitude
>> _FillValue
>> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
>>
>> (I modified line 205 to take the min of the array size of 10, vs. 1000
>>for
>> brevity.)
>>
>> ===== relevant code ====
>>
>> /**
>> * Test H4SDS.
>> */
>> private static void testH4SDS(String fileName)
>> {
>> H4File h4file = new H4File(fileName, HDFConstants.DFACC_READ);
>>
>> try {
>> h4file.open();
>> } catch (Exception ex)
>> {
>> System.out.println(ex);
>> }
>>
>> DefaultMutableTreeNode root =
>> (DefaultMutableTreeNode)h4file.getRootNode();
>> H4SDS sds = null;
>> DefaultMutableTreeNode node = null;
>> if (root != null)
>> {
>> Enumeration nodes = root.depthFirstEnumeration();
>> while (nodes.hasMoreElements())
>> {
>> node = (DefaultMutableTreeNode)nodes.nextElement();
>> Object obj = node.getUserObject();
>> if (obj instanceof H4SDS)
>> {
>> sds = (H4SDS)obj;
>> System.out.println(sds);
>>
>> // test H4CompoundDS attributes
>> Attribute attr = null;
>> List info = null;
>> try {
>> info = sds.getMetadata();
>> } catch (Exception ex)
>> { System.out.println(ex); }
>>
>> int n = 0;
>> if (info != null)
>> {
>> n = info.size();
>> for (int i=0; i<n; i++)
>> {
>> attr = (Attribute)info.get(i);
>> System.out.println(attr);
>> }
>> }
>>
>> // data
>> Object data = null;
>> try
>> {
>> data = sds.read();
>> } catch (Exception ex) {System.out.println(ex);}
>>
>> if ((data != null)&& data.getClass().isArray())
>> {
>> // print out the first 1000 data points
>> n = Math.min(Array.getLength(data), 10);
>> StringBuffer sb = new StringBuffer();
>> for (int j=0; j<n; j++)
>> {
>> sb.append(Array.get(data, j));
>> sb.append(" ");
>> }
>> System.out.println(sb.toString());
>> }
>> } //if (obj instanceof H4Group
>> } //while (nodes.hasMoreElements())
>> } //if (root != null)
>>
>> try {
>> h4file.close();
>> } catch (Exception ex)
>> {
>> System.out.println(ex);
>> }
>> }
>>
>> --
>> View this message in context:
>>http://hdf-forum.184993.n3.nabble.com/Problems-reading-a-datatset-using-h
>>df-java-tp4015601.html
>> Sent from the hdf-forum mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> Hdf-forum is for HDF software users discussion.
>> Hdf-forum@hdfgroup.org
>> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
>>
>
>--
>Thank you!
>--pc
>
>
>_______________________________________________
>Hdf-forum is for HDF software users discussion.
>Hdf-forum@hdfgroup.org
>http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
_______________________________________________
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