How can I import mdf4 files using mdfimport?

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Denis Ott
Denis Ott 2015-8-7
回答： Andrei about 20 hours 前
How can I import mdf4 files using mdfimport? I want to import mdf4 file (.mf4) using the mdfimport. - The function mdfimport at itself is running - I open MDF File then the folowing error message pop up: not valid file type
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回答（5 个）

Fabian Aigner
Fabian Aigner 2016-6-9
As far as I know, the mdf import module available at mathworks file exchange is only able to read MDF Version 3 files (or .dat when using INCA). Due to the much more complex specification of MDF 4 compared to MDF 3 (including some mechanisms to compress the a MDF 4.1 file), I don't know any available MATLAB freeware for importing MDF 4 files. There is an option for python ( https://pypi.python.org/pypi/mdfreader/0.2.1 ), but I have no experience with that at the moment.
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Yara
Yara 2023-11-20
@Walter Roberson is this the only way to access .mf4 file? The only way I know is converting it to a .dat (MDF v3) file. Thank you.

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Abdul Moeed Amjad
Abdul Moeed Amjad 2019-10-8
Hi,
I don't know whether my post is related or not but I extracted the data from mf4 files (obtained through dSPACE) using sequence of these commands:
1st: mdfds = mdfDatastore('buf_011.MF4');
2nd: data=readall(mdfds);
Regards
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zhaoliang yan
zhaoliang yan 2021-6-27
As I know ，this readall() will load the first chanel of same raster of the first one.
Do you know how to deal with different rasters in one mdf files?
Is there some tool in matlab to resample mdf files?

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Walter Roberson
Walter Roberson 2016-4-25
perhaps MDF Import Tool and Function updated for mdf-file format from INCA 7.1.9 in the File Exchange.
I cannot seem to find an example mf4 file to test this with.
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Walter Roberson
Walter Roberson 2016-5-4
I tried the tool a bit. I found a problem in it assuming a non-zero number of channels, and I repaired that in my copy. However, it then reached end of file in the test file unexpected. Testing further, I can see that it has interpreted parts of the file that are intended to be text as if they are data offsets. Either it is the wrong program to read those files, or else it has fundamental bugs beyond my available time to investigate.

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Walter Roberson
Walter Roberson 2019-8-1
https://www.mathworks.com/help/vnt/ug/mdf.html
These days, Vehicle Network Toolbox mdf() function supports MDF 4 files.
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Jonas B
Jonas B 2019-9-6
Hi Walter,
is the support of MDF 4 files in the Vehicle Network Toolbox available in Matlab 2016b ?
And there is no freeware of the toolbox, right?
Walter Roberson
Walter Roberson 2019-10-8
Yes, R2016b was the first release to introduce MDF4 files, as part of the Vehicle Network Toolbox
https://www.mathworks.com/help/releases/R2016b/vnt/ug/mdf.html

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Andrei
Andrei about 20 hours 前
mdfRead function in Vehicle Network Toolbox is the recommended way to read data from MDF files in MATLAB
https://www.mathworks.com/help/vnt/ug/mdfread.html

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