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polynomial.c File Reference

#include "utilf.h"
#include "polynomial.h"

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Functions

real polyeval (real *p, int n, real x)
void polyderiv (real *p, int n, real *pderiv)
void polyint (real *p, int n, real *pint)
void polymul (real *p1, int n1, real *p2, int n2, real *pmul)
void polyprint (real *p, int n)

Function Documentation

void polyderiv (  real *    p,
int    n,
real *    pderiv
) 
 

Definition at line 13 of file polynomial.c.

References real.

Referenced by interface_rrdz(), interface_rzdr(), and interface_surfaces(). 

00014 {
00015   int i;
00016   for (i = 0; i < n - 1; i++)
00017     pderiv[i] = (real)(i + 1)*p[i+1];
00018 }

real polyeval (  real *    p,
int    n,
real    x
) 
 

Definition at line 4 of file polynomial.c.

References real.

Referenced by interface_rrdz(), interface_rzdr(), and interface_surfaces(). 

00005 {
00006   real val = p[n-1];
00007   int i;
00008   for (i = n - 2; i >= 0; i--)
00009     val = x*val + p[i];
00010   return val;
00011 }

void polyint (  real *    p,
int    n,
real *    pint
) 
 

Definition at line 20 of file polynomial.c.

References real.

Referenced by interface_rrdz(), interface_rzdr(), and interface_surfaces(). 

00021 {
00022   int i;
00023   pint[0] = 0.0;
00024   for (i = 0; i < n; i++)
00025     pint[i+1] = p[i]/(real)(i + 1);
00026 }

void polymul (  real *    p1,
int    n1,
real *    p2,
int    n2,
real *    pmul
) 
 

Definition at line 28 of file polynomial.c.

References real.

Referenced by interface_rrdz(), interface_rzdr(), and interface_surfaces(). 

00029 {
00030   int i, j;
00031 
00032   for (i = 0; i < n1 + n2 - 1; i++)
00033     pmul[i] = 0.0;
00034   for (i = 0; i < n1; i++)
00035     for (j = 0; j < n2; j++)
00036       pmul[i + j] += p1[i]*p2[j];
00037 }

void polyprint (  real *    p,
int    n
) 
 

Definition at line 39 of file polynomial.c.

References real. 

00040 {
00041   int i;
00042   printf("[ ");
00043   for (i = 0; i < n; i++)
00044     printf("%g ", p[i]);
00045   printf("]");
00046 }

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