Zhuo Chen

You could simply use [`semilogy`](https://github.com/lava/matplotlib-cpp/blob/ef0383f1315d32e0156335e10b82e90b334f6d9f/matplotlibcpp.h#L1589-L1612), a thin wrapper around `plot` which additionally changes y-axis to log scaling: 

@colramos-amd is [loglog(x, y)](https://github.com/lava/matplotlib-cpp/blob/ef0383f1315d32e0156335e10b82e90b334f6d9f/matplotlibcpp.h#L1614-L1637) what you are looking for?

@ooeygui Actually [ros::Rate::sleep()](http://docs.ros.org/diamondback/api/rostime/html/classros_1_1Rate.html) already accounts for the processing overhead and sleeps for only the leftover of the sampling period. > `bool sleep()` Sleeps for any leftover time in a cycle....

I am also interested in this feature. I guess what we want is the capability of playing back a .mkv file in synchronization with a bag file. Maybe we could...