Standard File Formats

Access measurement data format (MDF), ASAM calibration data format (CDF), and binary logging format (BLF) files

Use the cdfx function to access an ASAM calibration data format CDFX-file.

Use the mdf function to access a measurement data format MDF-file, then read its data and save its attachments.

Use mdfDatastore to access a datastore of MDF-files.

Use blfread and blfwrite to import and export data from Vector binary logging format BLF-files.

Functions

CDFX-File

`cdfx`	Access information contained in CDFX-file
`instanceList`	Parameter instances in the CDFX object
`systemList`	ECU systems in the CDFX object
`getValue`	Retrieve instance value from CDFX object
`setValue`	Set instance value in CDFX object
`write`	Export data of CDFX object to file

MDF-File

`mdf`	Access information contained in MDF-file
`channelList`	Information on available MDF groups and channels
`read`	Read channel data from MDF-file
`saveAttachment`	Save attachment from MDF-file
`mdfInfo`	Information about MDF-file
`mdfSort`	Create sorted copy of MDF-file
`mdfVisualize`	View channel data from MDF-file

MDF Datastore

`mdfDatastore`	Datastore for collection of MDF-files
`read`	Read data in MDF datastore
`readall`	Read all data in MDF datastore
`preview`	Subset of data from MDF datastore
`reset`	Reset MDF datastore to initial state
`hasdata`	Determine if data is available to read from MDF datastore
`partition`	Partition MDF datastore
`numpartitions`	Number of partitions for MDF datastore

Vector BLF-File

`blfinfo`	Get information about Vector BLF file
`blfread`	Read data from Vector BLF-file
`blfwrite`	Write data to Vector BLF-file

Related Information

File Format Limitations

Platform Support

Datastore (MATLAB)

Featured Examples

Access MDF Files

Open MDF files and access information about the file and its contents.

Open Script

Reading Data from MDF Files

Read channel data from an MDF file.

Open Script

Using MDF Files Via MDF Datastore

Use the MDF Datastore feature of Vehicle Network Toolbox to quickly and efficiently process a data set spread across a collection of multiple MDF files. This workflow is also valuable when there is too much data to fit into available memory.

Open Script

Data Analytics Application with Many MDF Files

Investigate vehicle battery power during discharge mode across various drive cycles. The data for this analysis are contained in a set of vehicle log files in MDF format. For this example, we need to build up a mechanism that can "detect" when the vehicle battery is in a given mode. What we are really doing is building a detector to determine when a signal of interest (battery power in this case) meets specific criteria. When the criteria is met, we will call that an "event". Each event will be subsequently "qualified" by imposing time bounds. That is to say an event is "qualified" if it persists for at least 5 seconds (such a qualification step can help limit noise and remove transients). The thresholds shown in this example are illustrative only.

Open Live Script

Mapping MDF Channels to Simulink Model Input Ports

Programmatically map MDF channels and consume their data via input ports of a Simulink model. It performs the gathering of input port names of a Simulink model and correlates them to the contents of a given MDF file. A linkage between them is then created which consumes channel data sourced from the MDF file when the model runs.

Open Live Script