对merge_final每列数据大于135或小于125数据，赋值为相邻两个数的均值。将结果放到merge_final_n中，但对应点的结果不等于原数据集的相邻两点的均值。

merge_final_n = pd.DataFrame(columns = merge_final.columns, index = merge_final.index )

for j in range(0,merge_final_n.shape[1]):
    for i in range(1,(merge_final_n.shape[0])):
        if merge_final.iloc[i,j] >= 135:
            merge_final_n.iloc[i,j] = (merge_final.iloc[i+1,j]+merge_final.iloc[i-1,j])/2
        elif  merge_final.iloc[i,j] <= 125:
            merge_final_n.iloc[i, j] = (merge_final.iloc[i+1, j] + merge_final.iloc[i-1, j])/2
        else:
            merge_final_n.iloc[i, j] = merge_final.iloc[i, j]