>> num_samples4window = 20;

Run the following command
- "t" is the name of the timetrend variable in matlab workspace

>> tma = movingaverage( t, num_samples4window )

The filtered timetrend is saved in the variable "tma"

To view the results, run the following commands:

>> figure('Name','Before/after smoothing')

>> plot(t,'b')

>> hold on

>> plot(tma,'r')

>> legend {'Original' 'Smoothed'}

To save, either copy the smoother timetrend values from the command window, or use the save command with the -ascii option:

>> save smoothed_tt.txt tma -ascii

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