topic Re: How to post-process ecompass heading from logged data in Sensors https://community.nxp.com/t5/Sensors/How-to-post-process-ecompass-heading-from-logged-data/m-p/768961#M4973 <HTML><HEAD></HEAD><BODY><P>Chris,</P><P>See video #14 at&nbsp;<A href="https://community.nxp.com/thread/465153">https://community.nxp.com/thread/465153</A>&nbsp; to learn how an ecompass works.&nbsp; BUT I should tell you that without running magnetic compensation on the magnetometer outputs, it is very possible you will see significant errors.&nbsp; Video #13 in the same series discusses that topic.&nbsp; If you haven't logged data for compensation purposes, the best you can do is try to estimate constant offsets in the magnetometer outputs from the data you have.</P><P>Mike</P></BODY></HTML> Wed, 06 Dec 2017 16:51:29 GMT michaelestanley 2017-12-06T16:51:29Z How to post-process ecompass heading from logged data https://community.nxp.com/t5/Sensors/How-to-post-process-ecompass-heading-from-logged-data/m-p/768960#M4972 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I have a data set of MAG3110 magnetometer XYZ, MMA8451Q accelerometer XYZ and hard and soft iron offsets.&nbsp;Since all the available code here is geared towards live acquisition from development boards, would anyone be kind enough to suggest the quickest way to post-process the data set into ecompass pitch, roll and tilt-compensated heading please?&nbsp;I'm most familiar with Matlab but can also work with C.</P><P></P><P>Many thanks in advance..</P><P></P><P>Chris</P></BODY></HTML> Tue, 03 Feb 2026 22:28:49 GMT https://community.nxp.com/t5/Sensors/How-to-post-process-ecompass-heading-from-logged-data/m-p/768960#M4972 chriswrighton 2026-02-03T22:28:49Z Re: How to post-process ecompass heading from logged data https://community.nxp.com/t5/Sensors/How-to-post-process-ecompass-heading-from-logged-data/m-p/768961#M4973 <HTML><HEAD></HEAD><BODY><P>Chris,</P><P>See video #14 at&nbsp;<A href="https://community.nxp.com/thread/465153">https://community.nxp.com/thread/465153</A>&nbsp; to learn how an ecompass works.&nbsp; BUT I should tell you that without running magnetic compensation on the magnetometer outputs, it is very possible you will see significant errors.&nbsp; Video #13 in the same series discusses that topic.&nbsp; If you haven't logged data for compensation purposes, the best you can do is try to estimate constant offsets in the magnetometer outputs from the data you have.</P><P>Mike</P></BODY></HTML> Wed, 06 Dec 2017 16:51:29 GMT https://community.nxp.com/t5/Sensors/How-to-post-process-ecompass-heading-from-logged-data/m-p/768961#M4973 michaelestanley 2017-12-06T16:51:29Z