Last updated Friday 03rd December 1999
Reading CDF files in Matlab
The CDF (Common Data Format) data file format is often used for distributing and storing STP spacecraft data.Routines for reading CDF files in IDL are present in the standard CDF distribution. There is no comparable facility for Matlab, however.
I have written several Matlab functions which provide a primitive facility to access data in CDF files. One, cdfinfo lists variables in a CDF file and their properties. Another, cdfread returns data from named variables in the file. Finally, cdf2date,cdf2ep and cdf2time convert CDF Epoch times to Matlab date format, 1950.0 Epoch and [YY DD HH MM SS] format respectively.
Ultimate and Enterprise editions are almost identical in terms of features, only licensing plans and upgrade options are different. The 32-bit version of Windows 7 Ultimate support up to 4 GB RAM while the 64-bit version supports up to 192 GB RAM.
File create in the Common Data Format (CDF), a format used for storing scalar and multidimensional data in a manner independent of the target platform and discipline; used as a scientific data storage and interchange format by various researchers and organizations and often by those in government. To change file associations: Right-click a file with the extension whose association you want to change, and then click Open With. In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want. Select the Always use the selected program to open this kind of file check box.
- CDF Software Download Access to the latest official CDF software release and documentation is available at spdf.gsfc.nasa.gov. Below is a listing of the various platforms and operating systems supported currently or previously by CDF: PC Windows NT/2000/XP/Vista/7/8/10, Linux, Solaris on Intel, Cygwin, MinGW & QNX.
- CDF library includes a suite of tools that allow users to manipulate CDF files Provide read/write interfaces for C, FORTRAN, Java, Perl, C#/Visual Basic, IDL, MATLAB (and user-supplied software, e.g., Python, Sybase, mySQL) More in Frequently-Asked Questions (FAQ) Download the latest released version (V3.8.0).
- Description data = cdfread (filename) reads all the data from the Common Data Format (CDF) file specified filename. Specify filename as a character vector or string scalar. CDF data sets typically contain a set of variables, of a specific data type, each with an associated set of records.
Contents
More details
There are several programs, all of which are 'MEX' files - that is, they are compiled C programs that act like Matlab functions. They use v2.6 of the CDF library to retrieve information from CDF files. Once compiled, these programs act like any other M file.I have produced a distribution which contains SPARC Solaris executables of the programs, so if you use this platform you need not compile the programs. They are statically linked against the CDF library so you don't need to have this either. This distribution also contains source code.
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If you do wish to compile the programs, you will need the Matlab v5.2 MEX compiler, which also needs a C compiler. Details vary from platform to platform: consult your Matlab documentation. You will also need the CDF library. There is a source-only distribution which is much smaller than the executable one. Compilation instructions are included in both distributions.
One advantage of compiling the programs yourself is that you can produce versions which are dynamically linked against the CDF library, making the executables much smaller (typically by a factor of about 10). Instructions on how to do this are also included in the distributions.
An example
A typical use of the programs is to extract some magnetic field data from a file and plot it. Here is an example Matlab session:Version numbers
Program | Version | Date |
---|---|---|
cdfread | 0.42 | 03.11.99 |
cdfinfo | 0.3 | 02.03.99 |
cdf2date | 0.12 | 18.09.99 |
cdf2ep | 0.2 | 29.04.99 |
cdf2time | 0.2 | 29.04.99 |
sizetest | 0.10 | 26.07.99 |
Downloading the CDF reader
This software is distributed under the GNU public license. This license imposes significant restrictions on the use of the software, in particular on its distribution. It also limits my legal liabilities. Please read the license carefully before using the software.Two files are available for download: 50 states driver license pictures.
- Compiled programs for Solaris (updated 03.11.99)
- An archive containing executables, for SPARC Solaris 2.6 and Matlab 5.2. These may also work with different versions of Solaris. The executables are statically linked, which makes them rather large. If the CDF library is available on your system, if is better to download the source and re-compile the files with the CDF library dynamically linked. Unzip and untar the archive, then follow instructions in the ReadMe file.
- Source programs (updated 03.11.99)
- An archive containing source for the MEX files. To compile the programs, you will need a working Matlab installation with the MEX compiler and the CDF library distribution. Unzip and untar the archive, then follow instructions in the ReadMe file.
Mailing list
If you use this software and would like to know when new versions are released (typically every month or two), please email [email protected] and I will put you on an announcement mailing list.Other links
Tim Horbury home pageLast updated Friday 03rd December 1999 by Tim Horbury. The table below provides useful information about the .cdf file extension. It answers questions such as:
- What is the .cdf file?
- What program do I need to open a .cdf file?
- How can the .cdf file be opened, edited or printed?
- How can I convert .cdf files to another format?
Table of Contents
- ? .cdf file converters
We hope you find this page helpful and a valuable resource!
5 extension(s) and 1 alias(es) found in database
✅ Microsoft Channel Definition Format Data
Description:
CDF file is a Microsoft Channel Definition Format Data. Channel Definition Format (CDF) was an XML file format formerly used in conjunction with Microsoft's Active Channel, Active Desktop and Smart Offline Favorites technologies.
CDF file is a Microsoft Channel Definition Format Data. Channel Definition Format (CDF) was an XML file format formerly used in conjunction with Microsoft's Active Channel, Active Desktop and Smart Offline Favorites technologies.
Category:Data files
Mime-type: application/octet-stream
Magic number: -
Sample: -
-
-
-
✅ Affymetrix Chip Description File
Description:
CDF file is a Affymetrix Chip Description File. This library file containing information about which probes belong to which probe set.
CDF file is a Affymetrix Chip Description File. This library file containing information about which probes belong to which probe set.
Category:Data files
Mime-type: application/octet-stream
Magic string: -
CDF aliases:
CDF related links:
CDF related extensions:
Affymetrix Gene Information Library
Affymetrix Probe Array Results File
Affymetrix Probe Array Results File
Affymetrix Experiment File
Affymetrix Image Data File
Affymetrix Grid Control File
Affymetrix Mask File
Affymetrix Probe Set Information
✅ netCDF Data
Description:
CDF file is a netCDF Data. NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.
CDF file is a netCDF Data. NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.
Category:Data files
Mime-type: application/x-netcdf
Magic string: -
CDF aliases:
CDF related links:
CDF related extensions:
ANDI/netCDF Chromatography Data
✅ ECMG Content Definition File
Description:
CDF file is an ECMG Content Definition File. ECMG, LLC (Enterprise Content Management Group, LLC) is a consulting and software development company focused entirely on enterprise content management (ECM) solutions.
CDF file is an ECMG Content Definition File. ECMG, LLC (Enterprise Content Management Group, LLC) is a consulting and software development company focused entirely on enterprise content management (ECM) solutions.
Category:Data files
Mime-type: application/octet-stream
Magic string: -
CDF aliases:
CDF related links:
CDF related extensions:
ECMG Content Transformation File
✅ Amazon Lumberyard Character Definition Data
Description:
CDF file is an Amazon Lumberyard Character Definition Data. Amazon Lumberyard is a free, cross-platform, 3D game engine that allows you to create high-quality games, connect your games to the compute and storage of the AWS Cloud.
CDF file is an Amazon Lumberyard Character Definition Data. Amazon Lumberyard is a free, cross-platform, 3D game engine that allows you to create high-quality games, connect your games to the compute and storage of the AWS Cloud.
Category:Development files
Mime-type: application/octet-stream
Magic string: -
CDF aliases:
CDF related links:
CDF related extensions:
Amazon Lumberyard Uber File
Amazon Lumberyard Terrain Block Data
Amazon Lumberyard FBX Rules Data
Amazon Lumberyard Character Asset Data
Amazon Lumberyard Skinned Character Data
Amazon Lumberyard Static Geometry Data
Amazon Lumberyard CAD Exchange Data
Amazon Lumberyard Material Data
Amazon Lumberyard Motion Set Data
Amazon Lumberyard DirectDraw Surface Data
✅ ANDI/netCDF Chromatography Data
Description:
AIA file is a ANDI/netCDF Chromatography Data. ANDI/netCDF Chromatography Data Interchange Format (ANDI) is a data standard for analytical instrument data. ANDI is based on netCDF.
AIA file is a ANDI/netCDF Chromatography Data. ANDI/netCDF Chromatography Data Interchange Format (ANDI) is a data standard for analytical instrument data. ANDI is based on netCDF.
Category:Data files
Mime-type: application/x-netcdf
Magic string: -
AIA aliases:
AIA related links:
Cdf File Reader App
AIA related extensions:
netCDF Data
How To Play Cdfs Format
Other types of files may also use the .cdf file extension.
? The .cdf file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
ccf, cd, cdb, cdc, cdd, cde, cdg, cdr, cdt, cdv, cef, cf, cfd, cff, crf
Cdf File Reader Download
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
Configuration File
FreeWave Tool Suite Data
OpenEdge ABL Data Definition
Iconics GraphWorx32 Symbol Library
Paradox Table Filter
Microsoft SQL Server Database
Lightscape Parameter File
Adobe Acrobat Form Data Format Document
Format Description File
Origin Fitting Function Definition File
? Can't open a .cdf file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.cdf
To open this file, Windows needs to know what program you want to use to open it.
example.cdf
To open this file, Windows needs to know what program you want to use to open it.
If you don't know how to set the .cdf file association, check the FAQ.
? Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .cdf file extension, write to us!
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