John -
I actually found that the index iterator worked, so I was able to get the data
points I needed out.
Are you sure that Array.getDouble() is protected? I was able to call it even
though I wasn't doing any kind of inheritance.
Thanks.
Christine
From: netcdf-java-bounces@xxxxxxxxxxxxxxxx
[mailto:netcdf-java-bounces@xxxxxxxxxxxxxxxx] On Behalf Of John Caron
Sent: Monday, July 23, 2012 5:40 PM
To: netcdf-java@xxxxxxxxxxxxxxxx
Subject: Re: [netcdf-java] indexing problems with sliced array
Hi Christine:
Sorry, ignore previous post.
Array.getDouble() is really a protected method to get at the direct storage
underneath. You dont want to use it.
To access the individual array elements, you need to cast to ArrayDouble.D1 or
ArrayDouble.D2, and use theget() call.
Heres an example that should explain it:
public void testSlice3D() throws InvalidRangeException, IOException {
Array a = Array.makeArray(DataType.DOUBLE, 1000, 0.0, 1.0);
Array a3 = a.reshape(new int[] {10,10,10});
System.out.printf("%n%s%n", NCdumpW.printArray(a3, "test a3", null));
Array a2 = a3.slice(0,1);
System.out.printf("%n%s%n", NCdumpW.printArray(a2, "a3.slice(0,1)", null));
Array a1 = a2.slice(0,1);
System.out.printf("%n%s%n%n", NCdumpW.printArray(a1, "a2.slice(0,1)",
null));
ArrayDouble.D2 twoD = (ArrayDouble.D2) a2;
System.out.printf("wrong= %f%n", a2.getDouble(0));
System.out.printf("right= %f%n", twoD.get(0, 0));
ArrayDouble.D1 oneD = (ArrayDouble.D1) a1;
System.out.printf("wrong= %f%n", a1.getDouble(0));
System.out.printf("right= %f%n", oneD.get(0));
}
On 7/19/2012 11:22 AM, Smit, Christine E. (GSFC-610.2)[TELOPHASE CORP] wrote:
Hello!
I'm doing a double slice on a three-dimensional variable to get a 1-D slice and
then trying to read out the values. Unfortunately, indexing seems to give me
values from the full original array rather than the slice I'm working with.
Array twoD = array.slice(0, 1);
Array oneD = twoD.slice(0,1);
System.out.println(oneD.getDouble(0));
System.out.println(oneD);
System.out.println(array.getDouble(0));
This is what I see:
178.0
-9999 -9999 -9999 81 66 93 103 -9999 -9999 -9999 -9999 -9999
178.0
I would expect the first print statement to print -9999 since that is the first
element of the slice I'm working on. So this kind of looks like a bug to me.
How do I get the first element of my slice rather than of the entire parent
array?
Thanks.
Christine
--------------------------------
Dr. Christine Smit
christine.e.smit@xxxxxxxx<mailto:christine.e.smit@xxxxxxxx><mailto:christine.e.smit@xxxxxxxx><mailto:christine.e.smit@xxxxxxxx>
+1-301-614-5752
NASA Goddard, Building 32, N126-12
Code 610.2
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