[rrd-developers] Problems with MIN and graphing (Patch)

[Tobias Oetiker]

Hi Mary,

Here is the patch which fixes the MIN problem ...

---------------
--- rrd_graph.c~        Fri Jan  7 09:43:39 2000
+++ rrd_graph.c Mon Jan 24 22:20:02 2000
@@ -559,12 +559,16 @@
         
     for (src_row = skiprows; src_row < row_cnt; src_row+=reduce_factor) {
        for (col=0;col<(*ds_cnt);col++){
-           double newval=0;
+           double newval=DNAN;
            unsigned long validval=0;
            for (i=0;i<reduce_factor && src_row+i<row_cnt;i++) {
                unsigned long ptr = (src_row+i)* (*ds_cnt)+col;
                if (isnan((*data)[ptr])) continue; /* we can't help with NAN
*/
                validval++;
+               if (isnan(newval)) {
+                   newval = (*data)[ptr];
+               } else {
+                  
                switch (cf) {
                case CF_AVERAGE:
                    newval += (*data)[ptr];
@@ -578,6 +582,7 @@
                case CF_LAST:
                    newval = (*data)[ptr];
                    break;
+                 }
                }
            }
            if (validval == 0){newval = DNAN;} else{
--------------------

use gnu patch to apply ...

cheers
tobi


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