Thread: College kid-need help w/ C program by tonight

Code:

#include <stdio.h>
#include <math.h>
#include "drand.h"
#define PI (4*atan(1))
int main(void)
{  
   double A, t, T, p, n, w, y, a, b, c;      
 
   A=drand()+1;
   T=((drand()+1)*10);
   w=(2*PI/T);
   p=drand()*2*(4*atan(1)); 
    
   for(t=0; t<=50; t++)
  {  n=(drand()*.6-.3)*A;      
     y=A*sin( w*t + p) + n;
    printf("%f %f \n\n", t, y);
 
  }
    return 0;
}

Now modify the program so that while generating the data it uses some method, of your choice, to produce a good estimate of the period from the data. The estimate must be based only on the y values, and could for example use a sliding window.
Then, at the end, generate separate sine data using your sine function with w based on the estimated period, the original values of A and p, and no noise, to plot over the same range of t with points and lines.

It orginally plots just points, now i need to plot a line in addition (along the points as much as possible).Thanks in advance and please keep it real simple if possible.

You are rude
You don't need to reply or look at my thread

How about you read THIS

It says the entire homework, i already did part1 involving parrallel-series component reliability.
Plus i already have part2 half done which is what i posted.
So thanks for nothing.

Well with a title like: "College kid-need help w/ C program by tonight", Thats sure to get people to help you. People get annoyed when people ask others to do homework for them.

If you tried asking:

"I have this much code dont (put code here) but I am having trouble with this next part. I am trying to do whatever but don't understand whatever."

Wrong, why are you at these boards. Perhaps i worded it wrong, i needed help finding the period using a sliding window. You couldnt figure it out anyway.

Write a program to produce 51 samples of a noisy sine wave based on the following formula, to be implemented as a C function with at least one argument t (i.e. the other variables can be either arguments or global variables, but the noise n must be added in the main program, not the function):

y = A*sin( w*t + p) + n

for t = 0, 1, 2, ..., 50 where the amplitude A, radian frequency w = 2*pi/T, phase shift p, and additive noise n are randomly generated in the following ranges:
1.0 <= A <= 2.0
10.0 <= T <= 20.0
0.0 <= p <= 2*pi
-0.3*A <= n <= 0.3*A

Note that the random values for A, w, and p are generated just once, whereas random values for the noise n are generated for each sample.
Program output must be double-spaced so it will plot with points and no lines.

Now modify the program so that while generating the data it uses some method, of your choice, to produce a good estimate of the period from the data. The estimate must be based only on the y values, and could for example use a sliding window.

Then, at the end, generate separate sine data using your sine function with w based on the estimated period, the original values of A and p, and no noise, to plot over the same range of t with points and lines.

I'll do it for $10

oh my god like that is so sad!