Doxygen Source Code Documentation
zzlogy.c File Reference
#include "f2c.h"Go to the source code of this file.
Functions | |
| int | zzlogy_ (real *x, real *y1, real *y2, integer *ndec, real *tmaj, real *tmin) |
Function Documentation
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Definition at line 11 of file zzlogy.c. Referenced by zzaxyy_().
00013 {
00014 /* Initialized data */
00015
00016 static real tmlog[8] = { .30103f,.47712f,.60206f,.69897f,.77815f,.84509f,
00017 .90309f,.95424f };
00018
00019 /* System generated locals */
00020 integer i__1;
00021
00022 /* Local variables */
00023 static integer idec, imin;
00024 static real dymaj, xmajr, ymajr, xminr, yy;
00025 extern /* Subroutine */ int zzline_(real *, real *, real *, real *);
00026
00027
00028 /* Draw a log axis from (X,Y1) to (X,Y2) [physical coordinates], */
00029 /* with NDEC decades and the major and minor tic mark lengths in */
00030 /* TMAJ and TMIN, respectively. */
00031
00032 /* This array is LOG10 of 2,3,...,9; it is used to space the */
00033 /* minor divisions. */
00034
00035 /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00036 */
00037 zzline_(x, y1, x, y2);
00038 if (*tmaj == 0.f || *tmin == 0.f) {
00039 goto L8000;
00040 }
00041 xmajr = *x + *tmaj;
00042 xminr = *x + *tmin;
00043 dymaj = (*y2 - *y1) / *ndec;
00044 ymajr = *y1;
00045 zzline_(x, &ymajr, &xmajr, &ymajr);
00046
00047 i__1 = *ndec;
00048 for (idec = 1; idec <= i__1; ++idec) {
00049 if (*tmin != 0.f) {
00050 for (imin = 1; imin <= 8; ++imin) {
00051 yy = ymajr + tmlog[imin - 1] * dymaj;
00052 zzline_(x, &yy, &xminr, &yy);
00053 /* L100: */
00054 }
00055 }
00056 ymajr += dymaj;
00057 zzline_(x, &ymajr, &xmajr, &ymajr);
00058 /* L200: */
00059 }
00060
00061 L8000:
00062 return 0;
00063 } /* zzlogy_ */
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