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Questions tagged [asammdf]

64 questions
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How to list all the channels in .mdf4 file using asammdf in Python?

How to get a list of all the channel names in a .mdf4 file while using asammdf? I read the description here but am unable to figure out the exact code.
chronicagain
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How to count a channel in mdf file using asammdf library?

the mdf file contain many channel with Cha_meas_1,Cha_meas_2,Cha_meas_3,Cha_meas_4,Cha_meas_5,......Cha_meas_15.i want to count the number of channel starting with Cha_meas_, Currently i am doing as below: mdf_data =…
Mageo
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Select nonzero elements from MDF files in MATLAB

I am currently working with MDF file(.mf4) in MATLAB and I don't want to see the ChannelNumsamples that contain no values or lets say zero values so how to do that? I have tried with this code. but it is not helping me to extract nonzeroes…
gbk0029
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Merge or concatenate mdf files asammdf

I am trying to merge some mdf files using asammdf python package. When using MDF.concatenate I get this error: asammdf.blocks.utils.MdfException: internal structure of file 1 is different; different channels The files are from a data logger, and…
jB777
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python close mdf(.mf4) file

I read a mf4 file using asammdf package. I want to delete this file after doing some edits but failed. The error shows: This file is in use by another program and cannot be accessed by the process. I wonder how to close a mf4 file before…
YT Q
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Write scale/nested conversion with ASAMMDF

I am using this snippet in order to create a mf4 file with a value to text table, found in the examples from asammdf's github. vals = 5 conversion = { 'val_{}'.format(i): i for i in range(vals) } conversion.update( { …
raresRad1
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function for counting number of oscillations

i'm trying to build a counter which would detect number of oscillations in a given data i'm following a method where the slope of each point is calculated and based on negative and positive direction change is there a preexisting function for…
vijay gopi ramachandran
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Can Timestamp for a signal be extracted from an mdf file in Python?

I'm working with a large CAN log and have access to a .mf4 file only. I was wondering whether you can get the timestamp at which a certain signal was sent, much like loading a .log file. I have only encountered mdf.to_dataframe() command whcih…
Srivatsank Pullabhotla
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Asammdf: Rename Channel Group

i am working with asammdf to plot signals and now i have a problem, how can i rename the channel groups with the signal names? here is my code: mdf = MDF() sigs = [] for equipment in table_list: print("Table name:", equipment[0]) df =…
Laz
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How to convert mf4 files into mat files using asammdf?

I am knew to this topic and building a GUI for file conversion from mf4 to mat. Using the mdfreader already but need to extend it with asammdf to have an option.
Ewi
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writing unsorted mf4 file using asammdf

Does asammdf offer the possibility to write unsorted mf4 files? I have seen that it can read both unsorted and sorted mf4 files If it is possible do you know where I can find a short example?
ficus
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Create MF4 to be decode by J1939 DBC - asammdf

I'm trying to create a MF4 file to be decoded by a 'J1939.dbc' as the same way of CSS electronics My code to generate a example file is like this: from asammdf import MDF, SUPPORTED_VERSIONS, Signal import numpy as np sigs = [] mdf = MDF() samples…
Gabriel Lincoln
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Where to find info about MDF file structures and about "Group" and "Index" when working with .mdf files?

Background info: I'm trying to use asammdf to import .dat files in python. Trying to use "mdf.select(["Channel_name"])" - or variations thereof - gives the following error: asammdf - ERROR - Multiple occurances for channel "Channel_name": ((2, 18),…
Davysseus
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connect raw mf4 data with dbc - asammdf

i am quite new to python. for my masterthesis i need to extract some signales of a mf4 data using asammdf. i've only got the raw mf4 data and da dbc. how can i connect the mf4 data with the dbc and save the required signales in a variable or…
Florian Greimel
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Cannot extract Flexray signals from MF4 using dbc file

My question is: Is there a way to extract the flexray singals from Mf4 using dbc/arxml file and save to MDF format
Sadu Dinesh
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