- Nov 01, 2019 I have a small class that I use to manage some data that I'm working with. I use it to translate a 'hdf path' in to an actual on-disk file since storing all the data in one file just ends up being a mess that keeps growing as I debug.
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Hierarchical Data Format Select (i.e. Read) dataset “ dataset1 ” (in group “group1”) and write its content into a text file named “output.txt” using a DOS-based end of line (EOL) terminator.
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Likewise, people ask, how do I open an HDF file?
On the Home tab, in the Variable section, click Import Data. If you select an HDF4 or HDF-EOS file, the MATLAB Import Wizard automatically starts the HDF Import Tool. This opens an empty HDF Import Tool. To open a file, click the Open option on the HDFTool File menu and select the file you want to open.
Secondly, what does HDF stand for? high-density fiberboard
Keeping this in view, what is an HDF file?
HDF is a data file format used by Hierarchical Data Format. HDF files are used for the transfer of graphical and numerical data between machines. HDF files store data usually relating to scientific data. This information is stored in libraries and multi-object files.
What is .h5 file in Python?
About the project. The h5py package is a Pythonic interface to the HDF5 binary data format. It lets you store huge amounts of numerical data, and easily manipulate that data from NumPy. For example, you can slice into multi-terabyte datasets stored on disk, as if they were real NumPy arrays.
Please see The HDF Group's new Support Portal for the latest information.
A CTest script and platform configuration file can be used to simplify buildingwith CMake. The script below will build HDF4 with SZIP, ZLIB, and the JPEG externallibraries.
Preconditions:
CMakeMUST be installed. The minimum CMakeversion supported is 3.2.2
Blank spaces MUST NOT be used in directory path names as this will cause the buildto fail.
(Windows) NSIS or WiX should be installed in order to create an install image with CPack. NSIS will create a .exe installer. WiX will create a .msi installer.
Visual Studio Express users will not be able to package HDF into an install image executable. Turn off packaging by doing the following:
- Edit HDF4options.cmake.
- Add the line: set(ADD_BUILD_OPTIONS '${ADD_BUILD_OPTIONS} –DNO_LOCAL_PACKAGE:BOOL=ON')
- Uncomment the line: set(ADD_BUILD_OPTIONS '${ADD_BUILD_OPTIONS} -DHDF4_NO_PACKAGES:BOOL=ON')
- Comment out the line: set(ADD_BUILD_OPTIONS '${ADD_BUILD_OPTIONS} -DHDF4_PACKAGE_EXTLIBS:BOOL=ON')
Build Instructions
Please follow the instructions below for building.
Review the preconditions to be sure all needed software is on your machine.
Create a working directory.
Download the appropriate file for your platform to your working directory. Uncompress it. It will contain a CMake-hdf-4.2.13 directory.
Software Comments Windows Contains files to build HDF4 with CMake on Windows Unix Contains files to build HDF4 with CMake on Unix MD5 checksums for the source code distributions: [ md5 ]
From the command line, go into the CMake-hdf-4.2.13 directory, which contains: PLEASE NOTE that the HDF4options.cmake file is provided to enable users to easily change build options without modifying the CMake build files.
Execute the batch file or shell script containing the ctest command for your platform. Build scripts are provided for Unix, VS 2015, VS 2013, and VS 2012. (See Troubleshooting if you do not see your platform).
Example build files are shown below:
Platform Batch File / Shell Script ctest command Windows 64-bit VS 2015 build-VS2015-64.bat ctest -S HDF4config.cmake,BUILD_GENERATOR=VS201564 -C Release -V -O hdf4.log Windows 32-bit VS 2015 build-VS2015-32.bat ctest -S HDF4config.cmake,BUILD_GENERATOR=VS2015 -C Release -V -O hdf4.log Unix build-unix.sh ctest -S HDF4config.cmake,BUILD_GENERATOR=Unix -C Release -V -O hdf4.log Where the ctest command is using these options:
- The -S option uses the script version of ctest.
- The -C option specifies the build configuration which matches CTEST_BUILD_CONFIGURATION in the configuration file.
- The -V option indicates verbose. -VV option indicates more verbose.
- The -O option saves the output to a log file, hdf4.log.
The built binary will be placed in the build directory. It will have the format:
On Windows, a .msi or.exe file will also be created, depending on the installer. On Unix, an additional .sh file will be created.
If the built binary is not there, then see Troubleshooting for help.
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Troubleshooting
My platform/compiler is not included. Can I still use the configuration files?
Yes, you can but you will have to edit the HDF4config.cmake file and update the variable: Other variables may be updated for informational purposes but are not required (for example, SITE_OS_BITS).
The generators for your platform can be seen by typing:
What do I do if the build fails?
If the build works properly, then you will find the built and compressed binary in your CMake-hdf-4.N.N directory. If you do not find it then check the log files. You will find those in the build directory under CMake-hdf-4.N.N. For example, on Unix the log files will be in: There are log files for the configure, test, and build.
What if the binary does not get packaged properly?
If the binary did not get packaged properly, look at the cpack.log file in the build directory under CMake-hdf-4.N.N. For example, on Unix look here:
What do I do if I need to rebuild the software?
If you have to rebuild HDF4, remove the build directory first.
The library was built but there are no binaries. What do I do?
To install or package the binaries, run either make install or cpack in thebuild/ directory.