I am trying to create a program that can convert a duration to morse. And i cannot figure out why the if statements in durations2morse aren't printing the relevant snippet, I wanted to cover for a margin of error between input values. The add noise function was used to add variability for testing.

const int abcLength = 19;
int abcDurations[abcLength] = {420,-420,1260,-2940,1260,-420,420,-420,420,-420,420,-2940,1260,-420,420,-420,1260,-420,420};

void setup() {
  Serial.begin(9600);
  Serial.println("");
  randomSeed(analogRead(0));
  duration2morse(abcDurations,abcLength);
}

String duration2morse(int* durations, int length) {
  const float Variability = 0.1;
  int shortestDuration = 20000;
  addNoise(durations, length, Variability);
  for(int i=0; i < length; i++) {
    if(abs(durations[i]) < shortestDuration) {
      shortestDuration = durations[i];
    }
  }
  for(int i=0; i < length; i++) {
    Serial.print(durations[i] > shortestDuration * (1 - Variability));
    if(durations[i] > shortestDuration * (1 - Variability) && durations[i] < shortestDuration * (1 + Variability)) {
      Serial.print(".");
    } else if(durations[i] > shortestDuration * (3 - Variability) && durations[i] < shortestDuration * (3 + Variability)) {
      Serial.print("-");
    } else if(abs(durations[i]) > shortestDuration * (3 - Variability) && abs(durations[i]) < shortestDuration * (3 + Variability)) {
      Serial.print("/");
    } else if(abs(durations[i]) > shortestDuration * (7 - Variability) && abs(durations[i]) < shortestDuration * (7 + Variability)) {
      Serial.print(" ");
    } else {
      Serial.println("miss");
    }
  }
}

void addNoise(int* array, int length, float fraction) {
  for(int i=0; i < length; i++) {
    long variability = random(fraction * 100);
    long plusMinus = random(0,1);
    if(plusMinus == 0) {
      array[i] = array[i] + variability ;
    } else if(plusMinus == 1) {
      array[i] = array[i] - variability;
    }
  }
}