... ,0.4},; {"T", 0.2, 1.6 ,3.8 ,0.4},; {"T", 0.2, 1.6 ,3.6 ,0.4},; {"T", 0.2, 1.6 ,3.6 ,0.4} } I would like to find the largest number of the 4th array column ( adata[n][4]) how I must make ? thanks I made nHeightold:= adata[1][4] For n= 1 to Len(adata) If adata[n][4]>nHeightold ...