No T_imu_velo

[jaskaran1]

I could find only the T_velo_imu in data.calib but didn't find T_imu_velo.

So, right now I'm using this
https://mathematica.stackexchange.com/questions/106257/how-do-i-get-the-inverse-of-a-homogeneous-transformation-matrix

to get the T_imu_velo.

It would be helpful, if you could add this. Or I can send you a pull request later.

[leeclemnet]

Why not use T_imu_velo = numpy.linalg.inv(T_velo_imu) to do this? You should get the same result.