Mathc initiation/0003
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kg_fab.h |
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/* --------------------------------- */
/* save as kg_fab.h */
/* --------------------------------- */
void G_fab_2d(
CTRL_splot w,
double a,
double b,
double step,
double (*P_f)(double x)
)
{
FILE *fp = fopen("a_main.plt","w");
double i = a;
fprintf(fp," reset\n"
" set zeroaxis lt 8\n"
" set grid\n\n"
" set size ratio -1\n"
" plot [%0.3f:%0.3f] [%0.3f:%0.3f]\\\n"
" \"a\" with linesp lt 7 lw 3 pt 1,\\\n"
" \"b\" with linesp lt 7 lw 3 pt 1,\\\n"
" \"fab\" with line lt 8 lw 3\n\n",
w.xmin,w.xmax,w.ymin,w.ymax);
fclose(fp);
fp = fopen("a", "w");
fprintf(fp," %0.6f %0.6f\n", a, (*P_f)(a));
fprintf(fp," %0.6f %0.6f\n", a, 0.0);
fclose(fp);
fp = fopen("b", "w");
fprintf(fp," %0.6f %0.6f\n", b, (*P_f)(b));
fprintf(fp," %0.6f %0.6f\n", b, 0.0);
fclose(fp);
fp = fopen("fab", "w");
do{
fprintf(fp," %0.6f %0.6f\n", i,(*P_f)(i));
i += step;
}while(i <= b+step);
fclose(fp);
}
/* --------------------------------- */
/* --------------------------------- */