Search:

Submit Article

# Program of FITTING A POLYNOMIAL

Posted By: Bingham Fischer     Category: C Programming     Views: 4839

## Code for Program of FITTING A POLYNOMIAL in C Programming

```#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float x[10],y[10],sum[10],mat[3][4],temp=0,temp1=0,a1,a2,a3;
int i,n,j;
float fact(int);
clrscr();
printf("\nHow many record you will be enter: ");
scanf("%d",&n);
for(i=0; i<n; i++)
{
printf("\n\nenter the value of x%d: ",i);
scanf("%f",&x[i]);
temp=temp+x[i];
printf("\n\nenter the value of y%d: ",i);
scanf("%f",&y[i]);
temp1=temp1+y[i];
}
sum[0]=temp;
sum[1]=temp1;
sum[2]=sum[3]=sum[4]=sum[5]=sum[6]=0;

for(i=0;i<n;i++)
{
sum[2]=sum[2]+(x[i]*x[i]);
sum[3]=sum[3]+(x[i]*x[i]*x[i]);
sum[4]=sum[4]+(x[i]*x[i]*x[i]*x[i]);
sum[5]=sum[5]+(x[i]*y[i]);
sum[6]=sum[6]+(x[i]*x[i]*y[i]);
}
mat[0][0]=n;
mat[0][1]=mat[1][0]=sum[0];
mat[0][2]=mat[1][1]=mat[2][0]=sum[2];
mat[1][2]=mat[2][1]=sum[3];
mat[2][2]=sum[4];
mat[0][3]=sum[1];
mat[1][3]=sum[5];
mat[2][3]=sum[6];

temp=mat[1][0]/mat[0][0];
temp1=mat[2][0]/mat[0][0];
for(i=0,j=0;j<3+1;j++)
{
mat[i+1][j]=mat[i+1][j]-(mat[i][j]*temp);
mat[i+2][j]=mat[i+2][j]-(mat[i][j]*temp1);
}

temp=mat[2][1]/mat[1][1];
temp1=mat[0][1]/mat[1][1];
for(i=1,j=0;j<3+1;j++)
{
mat[i+1][j]=mat[i+1][j]-(mat[i][j]*temp);
mat[i-1][j]=mat[i-1][j]-(mat[i][j]*temp1);
}

temp=mat[0][2]/mat[2][2];
temp1=mat[1][2]/mat[2][2];
for(i=0,j=0;j<3+1;j++)
{
mat[i][j]=mat[i][j]-(mat[i+2][j]*temp);
mat[i+1][j]=mat[i+1][j]-(mat[i+2][j]*temp1);
}

for(i=0;i<3;i++)
{
for(j=0;j<4;j++)
{
printf(" %.3f ",mat[i][j]);
}
printf("\n\n");
}

a3 = mat[2][3]/mat[2][2];
a2 = mat[1][3]/mat[1][1];
a1 = mat[0][3]/mat[0][0];
printf("\n\nx = %.3f",a1);
printf("\n\ny = %.3f",a2);
printf("\n\nz = %.3f",a3);

getch();
}

/*______________________________________         OUT PUT______________________________________How many record you will be enter: 6enter the value of x0: 1.0enter the value of y0: 1.1enter the value of x1: 1.5enter the value of y1: 1.3enter the value of x2: 2.0enter the value of y2: 1.6enter the value of x3: 2.5enter the value of y3: 2.0enter the value of x4: 3.1enter the value of y4: 3.4enter the value of x5: 4enter the value of y5: 4.2  6.000  0.000  0.000  4.065  0.000  5.975  0.000  0.816  0.000  0.000  5.095  0.991x = 0.678y = 0.137z = 0.195*/```
Share:

Didn't find what you were looking for? Find more on Program of FITTING A POLYNOMIAL Or get search suggestion and latest updates.

 Bingham Fischer author of Program of FITTING A POLYNOMIAL is from Frankfurt, Germany. View All Articles

 Please enter your CommentComment should be atleast 30 Characters.Please put code inside [Code] your code [/Code]. No Comment Found, Be the First to post comment!