How to average monthly ascii data using Matlab?

How to average monthly ascii data using Matlab? I have monthly data of OMI tropospheric ozone from 2005-2016 (ASCII), I would like to average tropospheric ozone data in January from 2005-2016, and same goes for another month (february 2005-2016). Can you tell me please how to average monthly ascii data using Matlab? Thank you

Answer 1

[KL]

If you're using 2016b or later, I'd suggest using timetables. They make your life so much easier. Say you've imported your measurements and created a timetable, then you could resample using retime to create monthly mean.