I2C Temp Reader Trouble

I am attempting to create my first Arduino based project and am having trouble with some source code I found online to connect a temperature reader to a fan. I am getting an error that says “I2C_WRITE was not declared”.

Any suggestions would be great… below is the source code i am referencing. THanks

//TrackFan//
//Code and concept by ePums
//tempRead code by Dave Eaton and SensorJunkie

#include <Servo.h>
#include <i2cmaster.h>

Servo mrservo;

int j = 0;
int pos;
int posVals= {
0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120
};
double tempVals[12];
int hotPos;

void tempRead(){

//Define function for reading the temperature from the IR Sensor.
int dev = 0x5A<<1;
int data_low = 0;
int data_high = 0;
int pec = 0;
i2c_start_wait(dev+I2C_WRITE);
i2c_write(0x07);

i2c_rep_start(dev+I2C_READ);
data_low = i2c_readAck(); //Read 1 byte and then send ack
data_high = i2c_readAck(); //Read 1 byte and then send ack
pec = i2c_readNak();
i2c_stop();

//This converts high and low bytes together and processes temperature, MSB is a error bit and is ignored for temps
double tempFactor = 0.02; // 0.02 degrees per LSB
double tempData = 0x0000;
int frac;

// This masks off the error bit of the high byte, then moves it left 8 bits and adds the low byte.
tempData = (double)(((data_high & 0x007F) << 8) + data_low);
tempData = (tempData * tempFactor)-0.01;
tempData = tempData - 273.15;

tempVals[j] = tempData;
j+=1;
}

void servoSweep(){
Serial.println(“servoSweep initialize!”);
j = 0;
pos = 0;
//reset pos and temp indices
delay(500);
Serial.println(“Positions:”);
//return servo to initial position
for (pos = 0; pos < 130; pos +=10)
{
mrservo.write(pos);
//move servo 10 degrees
delay(200);
//allow sensor to settle
tempRead();
Serial.println(pos);
//read and store temp data
delay(300);
}
}

void findHot(){
Serial.println (“findHot started!”);
//find highest temperature, move servo to corresponding position
int i = 0;
//local search index
int q = 0;
double hotTemp = tempVals[0];
//the position data associated with the highest temperature in a given sweep
for (i=0; i < 13; i+=1) {
if (tempVals >= hotTemp) {
_ hotTemp =tempVals*;_
_
Serial.print("#" + String(i) + " hot Temp: ");_
_
Serial.println(hotTemp);_
_
delay(50);_
_
q = i;_
_
//retrieve index for highest temp value in tempVals array*_
* }*
* }*
* hotPos = posVals[q];*
* Serial.println("hotPos: ");*
* Serial.print(hotPos);*
* //retrieve the corresponding pos value from posVals index*
* if (mrservo.attached()) {*
* Serial.println(“this is reading output right now”);*
* }*
* delay(1000);*
* mrservo.detach();*
* mrservo.attach(3);*
* mrservo.write(hotPos);*
* delay(1000);*
* //move the servo*
* Serial.println(“Returning to hotPos”);*

_ /////////DELAY BETWEEN SCANS////////////////
* delay(10000);*
* i=0;*
}
void setup(){
* Serial.begin(9600);*
* i2c_init();
_
PORTC = (1 << PORTC4) | (1 << PORTC5);*

}
void loop(){
* mrservo.attach(3);*
* delay(1000);*
* mrservo.write(0);*
* i2c_init();
_
servoSweep();_
_
Serial.println(“Temperatures!”);_
_
for (int n=0; n < 13; n += 1) {_
_
Serial.println(tempVals[n]);_
_
delay(50);_
_
}_
_
findHot();_
_
mrservo.detach();_
_
delay(2000);_
_
}*_