*asammdf* is a fast parser and editor for ASAM (Associtation for Standardisation of Automation and Measuring Systems) MDF (Measurement Data Format) files. *asammdf* supports MDF versions 2 (.dat), 3 (.mdf) and 4 (.mf4). *asammdf* works on Python >= 3.6 (for Python 2.7, 3.4 and 3.5 see the 4.x.y releases)
# Status
! | Travis CI | Appveyor | CoverAlls | Codacy | ReadTheDocs
--|--|--|--|--|--
master | [](https://travis-ci.org/danielhrisca/asammdf) | [](https://ci.appveyor.com/project/danielhrisca/asammdf/branch/master) | [](https://coveralls.io/github/danielhrisca/asammdf?branch=master) | [](https://www.codacy.com/app/danielhrisca/asammdf?utm_source=github.com&utm_medium=referral&utm_content=danielhrisca/asammdf&utm_campaign=badger) | [](http://asammdf.readthedocs.io/en/master/?badge=stable) |
PyPI| conda-forge
--|--
[](https://badge.fury.io/py/asammdf) | [](https://anaconda.org/conda-forge/asammdf)
# Project goals
The main goals for this library are:
* to be faster than the other Python based mdf libraries
* to have clean and easy to understand code base
* to have minimal 3-rd party dependencies
# Features
* create new mdf files from scratch
* append new channels
* read unsorted MDF v3 and v4 files
* read CAN bus logging files
* extract CAN signals from anonymous CAN bus logging measurements
* filter a subset of channels from original mdf file
* cut measurement to specified time interval
* convert to different mdf version
* export to HDF5, Matlab (v4, v5 and v7.3), CSV and parquet
* merge multiple files sharing the same internal structure
* read and save mdf version 4.10 files containing zipped data blocks
* space optimizations for saved files (no duplicated blocks)
* split large data blocks (configurable size) for mdf version 4
* full support (read, append, save) for the following map types (multidimensional array channels):
* mdf version 3 channels with CDBLOCK
* mdf version 4 structure channel composition
* mdf version 4 channel arrays with CNTemplate storage and one of the array types:
* 0 - array
* 1 - scaling axis
* 2 - look-up
* add and extract attachments for mdf version 4
* handle large files (for example merging two fileas, each with 14000 channels and 5GB size, on a RaspberryPi)
* extract channel data, master channel and extra channel information as *Signal* objects for unified operations with v3 and v4 files
* time domain operation using the *Signal* class
* Pandas data frames are good if all the channels have the same time based
* a measurement will usually have channels from different sources at different rates
* the *Signal* class facilitates operations with such channels
* graphical interface to visualize channels and perform operations with the files
# Major features not implemented (yet)
* for version 3
* functionality related to sample reduction block: the samples reduction blocks are simply ignored
* for version 4
* experiemental support for MDF v4.20 column oriented storage
* functionality related to sample reduction block: the samples reduction blocks are simply ignored
* handling of channel hierarchy: channel hierarchy is ignored
* full handling of bus logging measurements: currently only CAN bus logging is implemented with the
ability to *get* signals defined in the attached CAN database (.arxml or .dbc). Signals can also
be extracted from an anonymous CAN logging measurement by providing a CAN database (.dbc or .arxml)
* handling of unfinished measurements (mdf 4): warnings are logged based on the unfinished status flags
but no further steps are taken to sanitize the measurement
* full support for remaining mdf 4 channel arrays types
* xml schema for MDBLOCK: most metadata stored in the comment blocks will not be available
* full handling of event blocks: events are transfered to the new files (in case of calling methods
that return new *MDF* objects) but no new events can be created
* channels with default X axis: the defaukt X axis is ignored and the channel group's master channel
is used
# Usage
```python
from asammdf import MDF
mdf = MDF('sample.mdf')
speed = mdf.get('WheelSpeed')
speed.plot()
important_signals = ['WheelSpeed', 'VehicleSpeed', 'VehicleAcceleration']
# get short measurement with a subset of channels from 10s to 12s
short = mdf.filter(important_signals).cut(start=10, stop=12)
# convert to version 4.10 and save to disk
short.convert('4.10').save('important signals.mf4')
# plot some channels from a huge file
efficient = MDF('huge.mf4')
for signal in efficient.select(['Sensor1', 'Voltage3']):
signal.plot()
```
Check the *examples* folder for extended usage demo, or the documentation
http://asammdf.readthedocs.io/en/master/examples.html
https://canlogger.csselectronics.com/canedge-getting-started/log-file-tools/asammdf-api/
# Documentation
http://asammdf.readthedocs.io/en/master
And a nicely written tutorial on the [CSS Electronics site](https://canlogger.csselectronics.com/canedge-getting-started/log-file-tools/asammdf-gui/)
# Contributing & Support
Please have a look over the [contributing guidelines](CONTRIBUTING.md)
If you enjoy this library please consider making a donation to the
[numpy project](https://www.flipcause.com/secure/cause_pdetails/MzUwMQ==).
## Contributors
Thanks to all who contributed with commits to *asammdf*:
* Julien Grave [JulienGrv](https://github.com/JulienGrv)
* Jed Frey [jed-frey](https://github.com/jed-frey)
* Mihai [yahym](https://github.com/yahym)
* Jack Weinstein [jackjweinstein](https://github.com/jackjweinstein)
* Isuru Fernando [isuruf](https://github.com/isuruf)
* Felix Kohlgrüber [fkohlgrueber](https://github.com/fkohlgrueber)
* Stanislav Frolov [stanifrolov](https://github.com/stanifrolov)
* Thomas Kastl [kasuteru](https://github.com/kasuteru)
* venden [venden](https://github.com/venden)
* Marat K. [kopytjuk](https://github.com/kopytjuk>)
* freakatzz [freakatzz](https://github.com/freakatzz)
* Martin Falch [MartinF](https://github.com/MatinF)
* dxpke [dxpke](https://github.com/dxpke)
* Nick James [driftregion](https://github.com/driftregion)
# Installation
*asammdf* is available on
* github: https://github.com/danielhrisca/asammdf/
* PyPI: https://pypi.org/project/asammdf/
* conda-forge: https://anaconda.org/conda-forge/asammdf
```shell
pip install asammdf
# for the GUI
pip install asammdf[gui]
# or for anaconda
conda install -c conda-forge asammdf
```
# Dependencies
asammdf uses the following libraries
* numpy : the heart that makes all tick
* numexpr : for algebraic and rational channel conversions
* wheel : for installation in virtual environments
* pandas : for DataFrame export
* canmatrix : to handle CAN bus logging measurements
* natsort
* cChardet : to detect non-standard unicode encodings
* lxml : for canmatrix arxml support
* lz4 : to speed up the disk IO peformance
optional dependencies needed for exports
* h5py : for HDF5 export
* scipy : for Matlab v4 and v5 .mat export
* hdf5storage : for Matlab v7.3 .mat export
* fastparquet : for parquet export
other optional dependencies
* PyQt5 : for GUI tool
* pyqtgraph : for GUI tool and Signal plotting (preferably the latest develop branch code)
* matplotlib : as fallback for Signal plotting
# Benchmarks
http://asammdf.readthedocs.io/en/master/benchmarks.html