How to use mean2 and skip some rows?

Hello! I have a matrix with dates from 1920's to 2020's. I want to get the means of my column #11. I used mean2 and it worked perfect but I do not want to include the means corresponding to years 1926 to 1929. How can I skip this dates and use mean2 for the entire matrix column?

Thank you!

Answer 1

[DGM]

What's wrong with just

mymean = mean(yearly_data_matrix(5:end,11));

since you're extracting a vector, I don't see the need for mean2()

[Nuria Andreu]

It worked perfectly, thank you! and thank you for letting me know about the vector