Moving average
- CSPM (from SPM12) includes a function that will create a moving average.
- Start CSPM (to add the folder to the path)
- Load the variable into matlab; Import data, and select an excel or text file.
- Get the variable name of the timetrend
- Set the number of samples over which to calculate the average
>> 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