How to create moving average filter in tide data?

Hi... my name is fahrul. I try to filtering for smoothing my data in format file txt. In this file, there are 3 coloumns. first is date, second is time and the last coloumn is value of tide. I used two coloumns data, date and velue only to plot in matlab. Anybody can help me to make syntax filtering by using moving average??

Answer 1

[Michael Haderlein]

If data is the array with your values and t is date/time:

plot(t, smooth(data));