The old "1e+nn" labels were really annoying me to no end, so, as goaded by
one mailing list post on rrd-users
(http://www.ee.ethz.ch/~slist/rrd-users/msg02951.html), I patched
rrd_graph.c myself. It's not entirely thorough, but certainly does the job
well here for use with MRTG traffic graphs. Adapt and apply as you see fit.
Applies to 1.0.39.
Now you get:
old new
1e+00 1
1e+01 10
1e+02 100
1e+03 1 k
1e+04 10 k
1e+05 100 k
1e+06 1 M
1e+07 10 M
1e+08 100 M
1e+09 1 G
1e+10 10 G
1e+11 100 G
1e+12 1 T
1e+13 10 T
1e+14 100 T
1e+15 1 P
1e+16 10 P
1e+17 100 P
1e+18 1 E
1e+19 10 E
1e+20 100 E
1e+21 1000 E
1e+22 10000 E
1e+23 100000 E
1e+24 1000000 E
...
Regards,
Ian Morgan
--
-------------------------------------------------------------------
Ian E. Morgan Vice President & C.O.O. Webcon, Inc.
[EMAIL PROTECTED] PGP: #2DA40D07 www.webcon.ca
* Customized Linux network solutions for your business *
-------------------------------------------------------------------
--- src/rrd_graph.c.orig Wed Aug 7 02:50:53 2002
+++ src/rrd_graph.c Wed Aug 7 04:33:24 2002
@@ -1970,6 +1970,8 @@
gdPoint polyPoints[4];
int styleMinor[2],styleMajor[2];
double value, pixperstep, minstep;
+ double tvalue;
+ char tvalsymbol;
/* find grid spaceing */
pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
@@ -2038,7 +2040,37 @@
gdImageLine(gif, polyPoints[0].x,polyPoints[0].y,
polyPoints[1].x,polyPoints[0].y,gdStyled);
- sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
+
+ /* Make log scale labels sane using SI units */
+ tvalue = value * yloglab[majoridx][i];
+ tvalsymbol='x';
+ if (tvalue >= 1e18) {
+ tvalsymbol = 'E';
+ tvalue /= 1e18;
+ } else if (tvalue >= 1e15) {
+ tvalsymbol = 'P';
+ tvalue /= 1e15;
+ } else if (tvalue >= 1e12) {
+ tvalsymbol = 'T';
+ tvalue /= 1e12;
+ } else if (tvalue >= 1e9) {
+ tvalsymbol = 'G';
+ tvalue /= 1e9;
+ } else if (tvalue >= 1e6) {
+ tvalsymbol = 'M';
+ tvalue /= 1e6;
+ } else if (tvalue >= 1e3) {
+ tvalsymbol = 'k';
+ tvalue /= 1e3;
+ }
+
+ /* sprintf(graph_label,"%3.0e",tvalue); */
+ if ( tvalsymbol == 'x' ) {
+ sprintf(graph_label, "%.0f", tvalue);
+ } else {
+ sprintf(graph_label, "%.0f %c", tvalue, tvalsymbol);
+ }
+
gdImageString(gif, SmallFont,
(polyPoints[0].x - (strlen(graph_label) *
SmallFont->w)-7),
--
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