plotUlog is matlab.m script package for plotting ULog files parsed and converted by pyulog. ULog is a self-describing logging format which is documented here.
Please note plotUlog is tested under MATLAB version R2017b on macos mojave.
- Install pyulog which will parse ULog file and convert to .csv files.
pyulog can be downloaded from here or visit https://github.com/PX4/pyulog
- clone plotulog git or download and unzip package in any folder.
Depending on the version of px4 firmware, ULog file can have different names.
In 1.8.0, ULog files are created as
/log/yyyy-mm-dd/hh_mm_ss.ulg
For convenience, change the .ulg file as
log###.ulg
Launch matlab and go to the folder you just cloned or unzipped.
Copy a ULog file into the folder.
In matlab terminal, enter
plotUlog("log###.ulg","Description")Description can be any of your choice for identifying the foldr.
plotUlog will call pyulog to create .csv files under ###_Description/ folder and start generating plots.
Once .csv files are created you can re-plot by entering the folder created from above.
plotUlog("###_Description/")Once Ulog files successfully converted to csv file, you can compare two different sensor data each other by calling compareSensorLogs as below If you have csv files under "001_log" and "002_log", enter
compareSensorLogs("001_log/","002_log/")and you will get these plots which makes easier for comparing two different sensor data at the same time.
See what's inside the script file and manipulate any of data you want.