I've been working on integrating the output of a new instrument into our
system, but when writing the streams to HDF, I was regularly getting out of
bounds exceptions. And it took a good bit of searching to discover that the
NATIVE_HBOOL types where I was storing several bool fields are
] NATIVE_HBOOL storage
Hi Scott,
On Feb 3, 2010, at 12:51 PM, Mitchell, Scott - IS wrote:
I've been working on integrating the output of a new instrument into our
system, but when writing the streams to HDF, I was regularly getting out of
bounds exceptions. And it took a good bit of searching
Is there a way to check for the existence of an attribute before attempting to
create one?
H5Lexists doesn't seem to work, I get an error message when I try.
Scott
This e-mail and any files transmitted with it may be proprietary and are
intended solely for
I'd like to agree that appending the 'd' to the debug libraries name is a bad
thing tm. It played particular havoc with the HDF5DotNet library because it
links the hdf DLLs in code:
[DllImport(hdf5dll.dll,
CharSet=CharSet::Auto,
I do not believe the Any CPU is available to Visual Studio C++ projects, C#
VB, but not C++.
I've had the assembly load problem too, but only when I've done an installer.
In that case I've had to force the hdf _hl libraries to be installed as well,
because the VS auto detect doesn't seem to
Can you instead use a time stamp on each data value? Then when you have no
data, just don't write anything.
Scott
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-boun...@hdfgroup.org] On
Behalf Of Herrero Vincent
Sent: Tuesday, October 26, 2010 3:54 AM
To: hdf-forum@hdfgroup.org
On the .NET side, H5L::iterate works on a H5GroupId not an H5FileOrGroupId like
the rest of H5L. Is there a reason for this? There should be a way to iterate
what's at the root level of the file, right?
The core HDF5 code seems to use the same underlying id. So, I tried changing
the
I am doing it slightly differently. My data structure is a similar compound
type depending upon the instrument data being saved. I however chose to put the
time data into a second time axis (dimension scale) which is also a Packet
Table. I chose this because having a smaller dataset should
If you know nothing about the data going in. Look at the Opaque data type.
Here's some info and an example (in IDL):
http://idlastro.gsfc.nasa.gov/idl_html_help/Opaque_Datatypes.html
S
-Original Message-
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-boun...@hdfgroup.org]
On
I'm doing something similar to what you are looking at. I have data coming in
from multiple instruments which go through processing and result in one or
several C# structures/arrays. In my example each instrument type has a
structure containing Packet Tables with associated time axes/scales.
. The index would be in it's own dataset with an array
of time records and perhaps a few other fields and relative links (I forget
what HDF5 calls them) to the actual data records.
-Val
On Feb 11, 2011, at 10:56 AM, Mitchell, Scott - IS wrote:
I'm doing something similar to what you are looking
Yes. That would be my message.
I had to write my own wrapper class for H5PT though. At a basic level it's
pretty straight forward using the other wrappers as a template. There are
difficulties with some dataset functions that should work with the packet
table, but don't (ex. adding or
: [Hdf-forum] Compression Level
Quoting Mitchell, Scott - IS scott.mitch...@itt.com:
Is there any guidance, rule of thumb, whatever on what compression
level to use? I haven't been able to find much detail; apart from 0
being no compression and 9 being maximum. Is there a good balance
If you look at the size, there will be a difference. The NATIVE_HBOOL is 4
bytes... which means it can be confused with Int32.
I have written code which will convert .NET to from HDF types and this is a
big conflict. There are several primitive type cases for which there is not a
1:1
Try it setting your struct with the Sequential Attribute:
[StructLayout(LayoutKind.Sequential)]
public struct testStruct
{...}
These are members of the System.Runtime.InteropServices namespace.
Scott
-Original Message-
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-
Speaking of h5perf_serial, I ran it (v 1.8.6) on my test machine (win 2008
32bit) and I'm seeing strange results for the HDF5 Read measurement. For a
single run, I see 0.0 or 19 MB/s or whatever. When I run many iterations, I get
something like Maximum Throughput @ 0.0 MB/s, Average Throughput
Daniele,
The Packet Table interface ends up creating a standard dataset that can be read
just like any other dataset. But it does simplify setup and appending data.
In fact, at a code level, you must access it as a dataset (H5D) in order to do
certain things... attributes scales come to mind.
The hdf5.net wrappers point specifically to the release version. If you want to
use the debug hdf libs you need to rename the libs or edit the Wrapper.
S
From: hdf-forum-boun...@hdfgroup.org [hdf-forum-boun...@hdfgroup.org] On Behalf
Of Gerd Heber
DB,
Why the 'round-about way of creating a byte array? Won't this work?
byte[] buffer = new byte[bufferSize];
What's going on inside your HdfHelper.ConvertToBytes function?
Scott
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-boun...@hdfgroup.org] On
Behalf Of Donald
11:00 AM, Mitchell, Scott - IS wrote:
DB,
Why the 'round-about way of creating a byte array? Won't this work?
byte[] buffer = new byte[bufferSize];
What's going on inside your HdfHelper.ConvertToBytes function?
Scott
From: hdf-forum-boun...@hdfgroup.orgmailto:hdf-forum-boun
Hey Donald,
You need to be close()ing your H5T type objects. I'm not sure if that's it,
but
Scott
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-boun...@hdfgroup.org] On
Behalf Of Donald Brandon
Sent: Monday, September 19, 2011 3:22 PM
To: HDF Users Discussion List
Subject:
There is an H5Fflush function, but it is currently not in HDF5DotNet. But it is
pretty easy to add. Take a look at H5F.cpp. Duplicate what's done for
H5F::close, but call H5Fflush instead. You'll need the function, the DllImport
statement, and the declaration in the header.
Scott
I'm not sure why you're having the Error 1 problem. But don't add the c hdf
*zip libs to the project. They should, however be in the build folder and/or
wherever you install/execute from.
From: hdf-forum-boun...@hdfgroup.org [mailto:hdf-forum-boun...@hdfgroup.org] On
Behalf Of Lukas
We've been making changes to the code that will allow it to run truly 64 bit,
and I'm having trouble getting the 64 bit HDF libraries to work.
On the 32 bit side(Windows Server 2008 Ent.), I've been running relatively
trouble free with version 1.8.6 (and the HDF5DotNet wrapper). With the 64 bit
environment are you using? Visual Studio? MinGW? Cygwin?
--
Mike Jackson www.bluequartz.net
On Jul 19, 2012, at 1:53 PM, Mitchell, Scott - IS wrote:
We've been making changes to the code that will allow it to run truly
64 bit, and I'm having trouble getting the 64 bit HDF libraries to
work
I'm running into an interesting problem with the latest HDFDotNet build under
Visual Studio 2010.
I have to make a few changes to the project; a couple extra function
interface wrappers and adding a strong named key to sign the library. The last
build (1.8.6) worked fine. The current one
tried using the file
identifier in the
H5Dopen in conjunction with the packet table name, and this seems to work (I
have other
errors). Is this the accepted way to do this?
Thanks,
Michele
On Tue, Oct 23, 2012 at 7:41 AM, Mitchell, Scott - IS
scott.mitch...@exelisinc.commailto:scott.mitch
Michael,
Do you have the HDF5 libraries in the build directory?
Scott
-Original Message-
From: Hdf-forum [mailto:hdf-forum-boun...@hdfgroup.org] On Behalf Of
Michael Koch
Sent: Thursday, November 15, 2012 1:00 PM
To: hdf-forum@hdfgroup.org
Subject: [Hdf-forum] Reading a HDF5 file
With the string/Chararray fix, I think things will work. String is probably
screwing up the offset of the rest of the fields. I think if you had an
int/float/etc. first that one would work, but all after the string go 'bad'.
Perhaps you need to add a [StructLayout(LayoutKind.Sequential)] to
[StructLayout(LayoutKind.Sequential)] should be at the head of your metadata
struct not Chararray.
So,
[StructLayout(LayoutKind.Sequential)]
struct metadata
{
public Chararray a;
public int b;
public float c;
public float d;
public Chararray f;
Also I'm not sure why you're using a double* in Chararray. It should be a char*
and is only used as a replacement for string. This is what I use:
/// summary
/// Chararray is a helper struct to marshal the strings into/out of
unmanaged HDF.
/// /summary
In my code I build the dataset via brute force to write the data. So I build
out the H5T struct(s) that I use.
-Original Message-
From: Hdf-forum [mailto:hdf-forum-boun...@hdfgroup.org] On Behalf Of
Insane
Sent: Tuesday, April 09, 2013 4:46 PM
To: hdf-forum@hdfgroup.org
Subject:
It looks ok at first glance. Do you define s1?
I have no code I can extract for a simple example, but I have many where I use
strings in a compound data type.
S
-Original Message-
From: Hdf-forum [mailto:hdf-forum-boun...@hdfgroup.org] On Behalf Of
Insane
Sent: Wednesday, April
You need to allocate a buffer where H5D.read() stores the data. H5Array doesn't
do that, it's just a wrapper. You should have something like:
Metadata[] s1 = new Metadata[datasetSize];
H5DataSetId dsetId = H5D.open(fileID, /metadata/songs);
H5DataTypeId
You can dynamically build a compound HDF type. I'm playing in the C#/.NET world
and through reflection, I can dynamically build the struct too. It's a bit
ugly, but is certainly do-able. I'm guessing it can be done on the C side using
untyped buffers and a lot of work figuring out appropriate
the struct. Can I have a copy of it?
I will look into untyped buffers and Boost::Variant.
Thanks,
Cecilia
From: Hdf-forum [mailto:hdf-forum-boun...@hdfgroup.org] On Behalf Of Mitchell,
Scott - IS
Sent: Wednesday, April 17, 2013 3:50 PM
To: HDF Users Discussion List
Subject: Re: [Hdf-forum
HDF5DotNet won't run in debug mode without some tweaking. The debug builds of
HDF add an extra 'd' into the name... hdf5ddll.dll, for example. The HDF5DotNet
libraries explicitly link to the release version. So you need to manually
change the code, the hdf dll names, or run HDF5DotNet in debug
)
{
// different error handling
}
I'm doing something similar when trying to load an attribute because the
H5L.exists function doesn't exist in the .NET wrapper (hint, hint :-))
Jesse
Mitchell, Scott - AES wrote:
Has anyone had success getting HDF5 error information from within a
.NET project
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