With the GUI tool you can

  • visualize channels

  • compare channels from multiple files in the same plot

  • see channel, conversion and source metadata as stored in the MDF file

  • access library functionality for single files (convert, export, cut, filter, resample, scramble) and multiple files (concatenate, stack)

After you pip install asammdf using pip install asammdf[gui] there will be a new script called asammdf.exe in the python_installation_folder\Scripts folder.

The following dependencies are required by the GUI

  • PyQt5

  • pyqtgraph

General shortcuts






Opens this online help page


Create plot

Create a new Plot window using the checked channels from the selection tree


Create numeric

Create a new Numeric window using the checked channels from the selection tree


Create tabular

Create a new Tabular window using the checked channels from the selection tree


Toggle fullscreen

In the single files mode will display the current opened file in full screen


Open file(s)

Single files

The Single files page is used to open several files individually for visualization and processing (for example exporting to csv or hdf5).

Layout elements

  1. Opened files tabs

  2. Channel tree display mode

  3. Complete channels tree

  4. Command buttons

  5. Windows area

  6. Numeric window

  7. Plot window

  8. Tabular window

  9. File operations

1. Opened files tabs

In the single files mode, you can open multiple files in parallel. The tab names have the title set to the short file name, and the complete file path can be seen as the tab tool-tip.

There is no restriction, so the same file can be opened several times.

2. Channel tree display mode

The channel tree can be displayed in three ways

  • as a naturally sorted list

  • grouped using the internal file structure

  • only the selected channels

3. Complete channels tree

This tree contains all the channels found in the measurement.

Double clicking a channel name will display a pop-up window with the channel information (CNBLOCK, CCBLOCK and SIBLOCK/CEBLOCK)


Only the channels that are checked in the channels tree will be selected for plotting when the Create window button is pressed. Checking or unchecking channels will not affect the current plot or sub-windows.

4. Command buttons

From left to right the buttons have the following functionality

  • Load configuration: restores channels tree and all sub-plot windows from a saved configuration file

  • Save configuration: saves all sub-windows (channels, colors, common axis and enable state) and channel tree

  • Select all channels: checks all channels in the channels tree

  • Reset selection: unchecks all channels in the channels tree

  • Advanced search & select: will open an advanced search dialog

    • the dialog can use wildcard and regex patterns

    • multiple channels can be selected, and thus checked in the channels tree

    • in the “Pattern based window” tab the user can define a pattern that will be used to filter out the channels from the measurement file, and as a second filtering step some condition can be used based on the channels values. This information will be saved in the window configuration. The pattern based windows can be easily recognized by the title bar icon

    • the keyboard shortcut Ctrl+F can also be used to bring up the search dialog

  • Create window: generates a new window (Numeric, Plot, Tabular, GPS, CAN/LIN/FlexRay Bus Trace) based on the current checked channels from the channels tree. If sub-windows are disabled in the settings then the current window is replaced by the new plot. If sub-windows are enabled then a new sub-plot will be added, and the already existing sub-windows will not be affected. The same channel can be used in multiple sub-windows.

5. Windows area

If sub-windows are enabled then multiple plots can be used. The sub-windows can be re-arranged using drag & drop.

6. Numeric window

Numeric windows can handle a lot more channels than plot windows. You can use a numeric window to see the channel values at certain time stamps, and to search for certain channel values.

  1. display area: here we can see the instantaneous signal values. The raw and scaled values are shown for each signal. Double clicking a column header will toggle the sorting on that column.

  2. integer format: choose between physical, hex and binary format.

  3. float decimals: choose the precision used for float display

  4. timestamp selection: use the input box or the slider to adjust the timestamp

  5. signal values search mode: choose between raw and scaled signal samples when searching for a certain value

  6. signal name pattern: use a wildcard pattern to select the signals that will be used for value searching

  7. operator: operator that will be used for the search

  8. target value: search target value

  9. direction: timebase direction for searching the values

Double clicking a row will bring up the range editor for associated signal.


7. Plot window

Plot windows are used to graphically display the channel samples.


pyqtgraph is used for the plots; to get the best performance consider the following tips.

  • limit the number of channels: plotting hundreds of channels can get really slow

  • disabling dots will make the plots a lot more responsive

The Plot window has three section 1. signal selection tree 2. graphical area 3. signal statistics panel (toggled using the M keyboard shortcut)

Each signal item from the signal selection tree has five elements

  1. display enable checkbox

  2. color select button

  3. channel name and unit label

  4. channel value label [4]

  5. common axis checkbox

  6. individual axis checkbox [5]

The user can also create channel groups in the selection tree. Simple channel groups are only used for grouping signals. Pattern based channel groups can be used to filter signals based on the name or samples values.

The selection tree has an extended context menu accessible using the right mouse click.

Double clicking an item will open a range editor dialog, similar to the Numeric window range editor.

The initial graphics are view will have all the signal homed-in (see the H keyboard shortcut). The user is free to use the mouse to interact with the graphics area (zoom, pan).

The cursor is toggled using the C keyboard shortcut, and with it the channel values will be displayed for each item in the Selected channels list. The cursor can also be invoked by clicking the plot area.

Using the R keyboard shortcut will toggle the range, and with it the channel values will be displayed for each item in the Selected channels list. When the range is enabled, using the H keyboard shortcut will not home to the whole time range, but instead will use the range time interval.

The Ctrl+H, Ctrl+B and Ctrl+P keyboard shortcuts will

  • change the axis values for integer channels to hex, bin or physical mode

  • change the channel value display mode for each integer channel item in the Signal selection tree

The Alt+R and Alt+S keyboard shortcuts will switch between the raw and scaled signal samples.

Each vertical axis width can be modified using the + and - buttons.


You can insert new computed channels by pressing the insert key. This will allow either to compute basic operations using the plot channels, to apply a function on one of the plot channels, or to specify a simple expression than uses multiple signals from the Plot window.


The currently active plot’s channels can be saved to a new file by pressing Ctrl+S. The channels from all sub-windows can be saved to a new file by pressing Ctrl+Shift+S.

The sub-windows can be tiled as a grid, vertically or horizontally (see the keyboard shortcuts).

8. Tabular window

The tabular window is very similar to an Excel/CSV sheet. The most powerful feature of this window is that multiple filters can be defined for the signals values.

_images/tabular1.png _images/tabular2.png

The tabular window has the following elements:

  1. display area: here we can see the signal values. The raw and scaled values are shown for each signal. Right clicking a column header will show a pop-up window for controlling the sorting, defining signal ranges and adjusting the columns width.

  2. integer format: choose between physical, hex and binary format.

  3. float decimals: choose the precision used for float display

  4. timestamp format: use the input box or the slider to adjust the timestamp display as float value or as datetime value

  5. remove prefix: remove column names prefix; avoids unnecessary large column widths

  6. toggle filters view: toggle the visibility of the filters (better vertical space if filters are not used)

  7. filter enable

  8. filter logical relation

  9. filtering signal

  10. filter operator

  11. target value for filtering

  12. apply filters: the actual filtering is done only after pressing the button. The user can modify the existing filters without changing the tabular view.

  13. query: the Tabular window used a pandas dataframe as backend. The filtering is done by performing a query on the dataframe.

9. File operations

There are five aspects related to the measurement file that can be accessed using the tabs:

  1. channels: here the user can visualize the signals using the available window types

  2. modify & export: this tab contains the tools needed for processing the measurement file. The use can filter signals, cut and resample the measurement, or export it to other file formats.

  3. bus logging: this tab is only visible for the measurements that contain CAN or LIN bus logging. The user can decode the raw bus logging using database files (.dbc, .ldf, .arxml)

  4. attachments: this tab is only visible if the measurement contains attachments. The user can extract the attachment and save it to a new file.

  5. info: this tab contains an overview of the measurement file content (channel groups, file header comments, total number of channels)

10. CAN/LIN/FlexRay Bus Trace

This window types can only be created by pressing the Create window button. If the measurement does not contain bus logging of the selected kind, then no window will be generated.

The filtering and signal ranges definition is done similar to the Tabular window.

11. Drag & Drop

Channels can be dragged and dropped between sub-windows for easier configuration. Drag and drop in the free MDI can be used to create new windows.


Batch processing

The Batch processing view is used to concatenate or stack multiple files, or to perform the same processing steps on multiple files. Keep in mind that the order of the input files is always preserved, only the samples timestamps are influenced by the Sync using measurements timestamps checkbox.

  1. file list

  2. file list sorting buttons

  3. batch operations

    1. concatenate requires input files with matching internal structure (same number of channel groups and the same set of channels in each n-th group). Each signal in the output file will be the result of concatenation of the samples from the input files

    2. modify & export: similar to the single files view

    3. stack will create a single measurement that will contain all the channel groups from the input files. Identically named channels will not be concatenated, they will just appear multiple times in the output file

    4. bus logging: similar to the single files view

The files list can be rearranged in the list (1) by drag and dropping lines. Unwanted files can be deleted by selecting them and pressing the DEL key. The files order is considered from top to bottom.


Use CTRL+F to search channels from all the opened files. The channel names are prefixed with the measurement index.