411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a00s
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
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/* ------------------------------------ */
/* Save as : vpfm.h */
/* ------------------------------------ */
double **fp_mR(
double **A,
char FileName[],
char MatrixName[],
int er,
int dr,
int n
)
{
FILE * fp = fopen(FileName,"a");
int r;
int c;
int n_c = C1;
int n_c_LAST;
int n_c_FIRST;
fprintf(fp,"%s",MatrixName);
while(n_c<A[C_SIZE][C0])
{
n_c+=n;
n_c_FIRST = n_c-n;
if(n_c<A[C_SIZE][C0])n_c_LAST = n_c;
else n_c_LAST = A[C_SIZE][C0];
for(r=R1; r<A[R_SIZE][C0]; r++)
{
fprintf(fp,"\n");
for (c=n_c_FIRST; c<n_c_LAST; c++)
fprintf(fp,"%+*.*f ",er,dr,A[r][c]);
}
fprintf(fp,"\n");
}
fprintf(fp,"\n\n");
fclose(fp);
return(A);
}
/* ------------------------------------ */
double **fpE_mR(
double **A,
char FileName[],
char MatrixName[],
int er,
int dr,
int n
)
{
FILE * fp = fopen(FileName,"a");
int r;
int c;
int n_c = C1;
int n_c_LAST;
int n_c_FIRST;
fprintf(fp,"%s",MatrixName);
while(n_c<A[C_SIZE][C0])
{
n_c+=n;
n_c_FIRST = n_c-n;
if(n_c<A[C_SIZE][C0])n_c_LAST = n_c;
else n_c_LAST = A[C_SIZE][C0];
for(r=R1; r<A[R_SIZE][C0]; r++)
{
fprintf(fp,"\n");
for (c=n_c_FIRST; c<n_c_LAST; c++)
fprintf(fp,"%+*.*e ",er,dr,A[r][c]);
}
fprintf(fp,"\n");
}
fprintf(fp,"\n\n");
fclose(fp);
return(A);
}
/* ------------------------------------ */
/* ------------------------------------ */
/* ------------------------------------ */
double **fP_mR(
double **A,
char FileName[],
char MatrixName[],
int er,
int dr,
int n
)
{
FILE * fp = fopen(FileName,"a");
int r;
int c;
int n_c = C1;
int n_c_LAST;
int n_c_FIRST;
fprintf(fp,"%s",MatrixName);
while(n_c<A[C_SIZE][C0])
{
n_c+=n;
n_c_FIRST = n_c-n;
if(n_c<A[C_SIZE][C0])n_c_LAST = n_c;
else n_c_LAST = A[C_SIZE][C0];
for(r=R1; r<A[R_SIZE][C0]; r++)
{
fprintf(fp,"\n");
for (c=n_c_FIRST; c<n_c_LAST; c++)
fprintf(fp,"%+*.*f, ",er,dr,A[r][c]);
}
fprintf(fp,"\n");
}
fprintf(fp,"\n\n");
fclose(fp);
return(A);
}
/* ------------------------------------ */
double **fPE_mR(
double **A,
char FileName[],
char MatrixName[],
int er,
int dr,
int n
)
{
FILE * fp = fopen(FileName,"a");
int r;
int c;
int n_c = C1;
int n_c_LAST;
int n_c_FIRST;
fprintf(fp,"%s",MatrixName);
while(n_c<A[C_SIZE][C0])
{
n_c+=n;
n_c_FIRST = n_c-n;
if(n_c<A[C_SIZE][C0])n_c_LAST = n_c;
else n_c_LAST = A[C_SIZE][C0];
for(r=R1; r<A[R_SIZE][C0]; r++)
{
fprintf(fp,"\n");
for (c=n_c_FIRST; c<n_c_LAST; c++)
fprintf(fp,"%+*.*e, ",er,dr,A[r][c]);
}
fprintf(fp,"\n");
}
fprintf(fp,"\n\n");
fclose(fp);
return(A);
}
/* ------------------------------------ */
/* ------------------------------------ */
fP_mR(); and fPE_mR(); add a comma separating the numbers, instead of a single space, to make it easy to reintroduce a matrix into a C file.