Error: expected unqualified-id before ‘(’ token

I have a fair amount of experience with entry level Arduino programming. However, I keep getting this error that is really confounding me.

This is the error I am getting:

acceleromVibration1.cpp: In function ‘void loop()’:
acceleromVibration1.cpp:96:37: error: expected unqualified-id before ‘(’ token
acceleromVibration1.cpp:96:37: error: expected primary-expression before ‘)’ token
acceleromVibration1.cpp:96:37: error: expected primary-expression before ‘)’ token
acceleromVibration1.cpp:96:37: error: expected primary-expression before ‘)’ token

I will post the entirety of my code below but the problem is specifically in one of my if statements. The line referenced by the error is a Serial.print("foo"). However, just commenting out that Serial print line does not get rid of the error. All of the offending code appears to be in the following if statement, because if I comment out all of this it compiles fine. However, this is a pretty important part of my code.

if(newArray){
     //analyze the arrays 
      
    for(int i = 0; i < arraySize; i++){
       int deltaAbs = accelValsX[i].abs();
       if(deltaAbs <= 1){
        lowDeltaX = lowDeltaX + 1; 
       }
     }
     vibratioX = ((arraySize - lowDeltaX)  / arraySize);
     Serial.print("VibratioX: ");
     Serial.println(vibratioX);
     
   
     newArray = false;
   }

Here is the entirety of my code if that is also helpful:

////////SETUP VALUES//////////
unsigned long readTime = 100;
int arraySize = 100;

/////////////////////////////
int first;
int x0 = 0;
int z0 = 0;
int y0 = 0;
int xMax = 0;
int yMax = 0;
int zMax = 0;
int xMin = 1024;
int yMin = 1024;
int zMin = 1024;
int xLast = 0;
int yLast = 0;
int zLast = 0;
int xDelta = 0;
int yDelta = 0;
int zDelta = 0;
unsigned long lastTime = millis();
int index = 0;
int i = 0;
int lowDeltaX = 0;
int lowDeltaY = 0;
int lowDeltaZ = 0;
int accelValsX[100];
int accelValsY[100];
int accelValsZ[100];
double vibratioX = 0;
double vibratioY = 0;
double vibratioZ = 0;
boolean newArray = false;

void setup() {
  Serial.begin(9600);
  //first = 1;  
}

void loop () {
  //time = millis();
  if((millis() - lastTime) > readTime){
    //read sensor
    x0 = analogRead(0);
    y0 = analogRead(1);
    z0 = analogRead(2);
    
    lastTime = millis();
  }
  
   preMaths();
    
    if(index < arraySize){
      accelValsX[index] = xDelta;
      accelValsY[index] = yDelta;
      accelValsZ[index] = zDelta;
    }else{
      index = 0;
      newArray = true;
    }
  
if(newArray){
     //analyze the arrays 
      
    for(int i = 0; i < arraySize; i++){
       int deltaAbs = accelValsX[i].abs();
       if(deltaAbs <= 1){
        lowDeltaX = lowDeltaX + 1; 
       }
     }
     vibratioX = ((arraySize - lowDeltaX)  / arraySize);
     Serial.print("VibratioX: ");
     Serial.println(vibratioX);
     
   
     newArray = false;
   }
    
    printing();
 // delay(100);
}

void preMaths(){
 
  //delta
  xDelta = xLast - x0;
  yDelta = yLast - y0;
  zDelta = zLast - z0;
  
  //reset last
  xLast = x0;
  yLast = y0;
  zLast = z0;
}

void printing(){
  //tab seperated
  Serial.print("DX:");
  Serial.print(xDelta);
  Serial.print("\tDY:");
  Serial.print(yDelta);
  Serial.print("\tDZ:");
  Serial.println(zDelta);
  
}

Thanks for any help, I have googled around a lot and lots of people get this error, but I have not be able to adapt any of the answers to my problem and I am about to pull my hair out. I hope it is something stupid that I have over looked, but I am just at a loss for what to do. THANKS!

       int deltaAbs = accelValsX[i].abs();

abs doesn't work like that. Use this:

       int deltaAbs = abs(accelValsX[i]);

Pete

int deltaAbs = accelValsX[i].abs();

As far as I can see, accelValsX[ i ] is an int. You are treating it as if it was an object defining a method abs().

That was it!!!

Thank you guys SO MUCH!