how to apply code some interval columns

I want to apply this code some interval of data

envelope(data,1,'peak')

[peakHeights,valleyHeights] = envelope(data,1,'peak')

vi = sum(peakHeights-valleyHeights)

[peakHeights, indexesOfPeaks] = findpeaks (data);

[valleyHeights, indexesOfValleys] = findpeaks (data);

fi = numel(indexesOfPeaks) + numel(indexesOfValleys)

for example

if data set is [ 1 2 3 4 4 3 5 3 2 3 5 6 7 7 3 5 6 7 1 9 2 4 6 7 8 8 4 3 2 2 5 5 ]

i want apply this code some interval (if 3 column ) like [1 2 3], [2 3 4], [3 4 4], [4,4,3].....[2 5 5] moving forward 1 colmumn.

so, i want to know how to apply code to some interval ( in here 3 column) in moving 1 column forward.

please let me know, thank you

Answer 1

[Ameer Hamza]

You can write a for-loop

x = [ 1 2 3 4 4 3 5 3 2 3 5 6 7 7 3 5 6 7 1 9 2 4 6 7 8 8 4 3 2 2 5 5 ];
n = 3;
for i = 1:numel(x)-n+1
    xi = x(i:i+2); % n-element vector
    % process xi
end