how to average specific column from many file

dear all,

I have 100 text file and every file have 3 column (lat,longitude and sea level)..i need to add the sea level (column 3) between file for every latitude and longitude and get the average..how i can do that

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F