clc; data (12054, : ) = [0 0 0 0 0 0]; j=1; k=1; for 1=1:12053 Max (j) = data (1, 4) ; Min (j) = data (1,5); Mean (j ) = data(i, 6); j = j+1; if data (i 2)-=data(i+1, 2) ExtMax (k) = max (Max) ; ExtMin (k) = min (Min) ; ExtMean (k) = mean (Mean ) ; k = k+1; j = 1; end end