// "Whatever you do, work at it with all your heart, as working for the Lord,
// not for human masters, since you know that you will receive an inheritance
// from the Lord as a reward. It is the Lord Christ you are serving."
// (Col 3:23-24)
pubfnmaximum(row1:&[&f64], row2:&[&f64])->f64{letmut distance =f64::MIN;for(&x1,&x2)in row1.iter().zip(row2.iter()){
distance =(x1 - x2).abs().max(distance);}
distance
}