Simple Matlab GUI to View PX4 ULog Files

This GUI was created using GUIDE in Matlab 2017a. It is fairly simple, it can only plot the time histories of message fields. To process the ULog file, pyulog is used.

Getting Started

• Install pyulog using pip first (as explained on that page).

• Make sure it has installed ulog2csv correctly (check the output of which ulog2csv in Linux/MacOS or where ulog2csv in Windows).

• Change the following line in ulogviewver.m:

handles.ulog2csv = '/opt/anaconda3/bin/ulog2csv';

The above path should correctly point to the ulog2csv binary installed by pyulog.

• Make sure this repository folder is available in Matlab path and type ulogviewer to launch the GUI.

• Click on 'Select File' button to select a .ulg file. The GUI will call ulog2csv to convert the ulog file into multiple CSV files, and then load the data from those CSV files.

• Once the data is loaded, the upper listbox contains all the messages found. You can select one message in this box.

• For the selected message, the lower listbox shows all the fields. You can select multiple of these fields and click 'Plot' to plot them.