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

Shortcut Action Description
F1 Help Opens this online help page
F2 Create plot Create a new Plot window using the checked channels from the selection tree
F3 Create numeric Create a new Numeric window using the checked channels from the selection tree
F4 Create tabular Create a new Tabular window using the checked channels from the selection tree
F8 Toggle fullscreen In the single files mode will display the current opened file in full screen
Ctrl+O 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. Plot/Sub-plots area
  6. Numeric window
  7. Plot window
  8. Sub-plot channel selection list
  9. Sub-plot graphics area
  10. Sub-plot channels statistics panel
  11. 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 two ways

  • as a naturally sorted list
  • grouped using the internal file structure

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 Plot button is pressed. Checking or unchecking channels will not affect the current plot or sub-plots.

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

5. Plot/Sub-plots area

If sub-plots are enabled then multiple plots can be used. The sub-plots can be re-aranged 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. The time stamps can be selected using the spin box or the slider.

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

8. Sub-plot channel selection list

When the Plot button is pressed the checked channels will populate the Selected channels list.

Selecting items from the Selected channels list will display their Y-axis on the left side of the plot. Individual axis for each signal can also be toggled and they will show on the right side of the plot.

It is also necessary to select a single item when the Statistics panel is active to compute the statistics for the item’s channel.


Each item 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 channel name can be copied to the clipboard using Ctrl+C.

Double clicking an item will open a range editor dialog


Here we can specify a range value visual alert. When the cursor is active and the current channel value is within the specified range, the item background will change to the selected color.


9. Sub-plot graphics area

The initial plot will have all channels homed (see the H keyboard shortcut)

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.

The Ctrl+H and Ctrl+B keyboard shortcuts will

  • change the axis values for integer channels to hex and bin mode
  • change the channel value display mode for each integer channel item in the Selected channels list
_images/cursor_hex.png _images/cursor_bin.png

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 Statistics panel is toggle using the M keyboard shortcut


You can insert new computed channels by pressing the insert key. This will allow either to compute basic operations using the plot channels, or to apply a function on one of the plot channels.

_images/compute_channel_dialog.png _images/compute_channel_plot.png

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

The sub-plots can be tiled as a grid, vertically or horizontally


Drag & Drop

Channels can be dragged and dropped between sub-plots for easier configuration.


Multiple files

The Multiple files toolbox page is used to concatenate or stack multiple files.


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.


[1](1, 2) If the cursor is present then zooming will center on it.
[2]Clicking the plot will move the left margin of the region. Pressing CTRL while clicking the plot will move the right margin of the region.
[3](1, 2) New in asammdf 5.7.0
[4]the value is only displayed if the cursor or range are active. For the cursor is will show the current value, and for the range it will show the value delta between the range start and stop timestamps
[5]New in asammdf 5.7.0
[6](1, 2, 3) New in asammdf 5.20.0