i need help writing a program. and please explain the steps if possible. there a

Question

i need help writing a program. and please explain the steps if possible.

there are 1000 integers in a file called "data.txt". assume they are the experiment data you obtained, and now you want to write a program to do data analysis. it should include:

-write a function to find the average value of the 1000 data.

-write a function to calculate the average absolute deviation of all the data.

-write a function to calculate the variance of all the data.

you can use the function fabs(x) defined in <math.h> or do it in another way.

Explanation / Answer

#include<stdio.h>

#include<math.h>

//Function for finding average

float getAvg(int data[], int num)

{

int i;

float avg=0;

float nums;

//type casting num(int) to nums(float) to avoid integer division in loop

nums = (float)num;

for(i=0;i<num;i++)

{

avg+=data[i]/nums;

}

return avg;

}

//Function for finding Average absolute Deviation

float getAvgAbsDev(int data[], int num, float avg)

{

int i;

float dev = 0;

for(i=0;i<num;i++)

{

dev+=fabs(data[i] - avg)/num;

}

return dev;

}

//function for finding variance

float getVariance(int data[], int num, float avg)

{

int i;

float variance=0;

for(i=0;i<num;i++)

{

variance+=(data[i]-avg)*(data[i]-avg)/num;

}

return variance;

}

int main()

{

FILE *fp;

fp = fopen("data.txt","r");

int i,num,data[1000];

for(i=0;fscanf(fp,"%d",&data[i])!=EOF;i++);

//storing the number of elements scanned

num=i;

float avg = getAvg(data,num);

printf("average=%f ",avg);

printf("average absolute deviation=%f ",getAvgAbsDev(data,num,avg));

printf("variance=%f ",getVariance(data,num,avg));

return 0;

}

sourcecode : http://kopasite.net/up/yo4pvdl7r743yxr/BraveBattleship4289.c

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