Difference between revisions of "LlListStatistics"

From Second Life Wiki
Jump to: navigation, search
(Undo ridiculous and pointless revision)
m (3 is enough, wonder if I should fix the overflow issue.)
Line 57: Line 57:
 
list dil_s;
 
list dil_s;
 
list fps_s;
 
list fps_s;
integer ticks;
+
integer ticks = 0;
  
 
default
 
default
Line 75: Line 75:
 
         dil_s = llList2List(dil_s + llGetRegionTimeDilation(), -60, -1);
 
         dil_s = llList2List(dil_s + llGetRegionTimeDilation(), -60, -1);
 
         fps_s = llList2List(fps_s + llGetRegionFPS(), -60, -1);
 
         fps_s = llList2List(fps_s + llGetRegionFPS(), -60, -1);
         if(3 > ++ticks)
+
         if(3 <= ++ticks)
 
         {
 
         {
 
             llSetText(
 
             llSetText(

Revision as of 11:38, 9 August 2014

Summary

Function: float llListStatistics( integer operation, list src );

Returns a float that is the result of performing statistical aggregate function operation on src.

• integer operation a LIST_STAT_* flag
• list src

If a list entry type is not a float or an integer it is silently ignored.

Constant Description
LIST_STAT_RANGE 0 Calculates the range.
LIST_STAT_MIN 1 Calculates the smallest number.
LIST_STAT_MAX 2 Calculates the largest number.
LIST_STAT_MEAN 3 Calculates the mean (average).
LIST_STAT_MEDIAN 4 Calculates the median number.
LIST_STAT_STD_DEV 5 Calculates the standard deviation.
LIST_STAT_SUM 6 Calculates the sum.
LIST_STAT_SUM_SQUARES 7 Calculates the sum of the squares.
LIST_STAT_NUM_COUNT 8 Determines the number of float and integer elements.
LIST_STAT_GEOMETRIC_MEAN 9 Calculates the geometric mean.

Examples

<lsl>// shows just how bad SL is behaving and demonstrates the use of llListStatistics() list dil_s; list fps_s; integer ticks = 0;

default {

   state_entry()
   {
       llSetTimerEvent(1.0);
   }
   
   on_rez (integer parm)
   {
       llResetScript();
   }
   
   timer()
   {
       dil_s = llList2List(dil_s + llGetRegionTimeDilation(), -60, -1);
       fps_s = llList2List(fps_s + llGetRegionFPS(), -60, -1);
       if(3 <= ++ticks)
       {
           llSetText(
               "Dilation: min="+(string) llListStatistics(LIST_STAT_MIN, dil_s) + ", mean=" +
                   (string) llListStatistics(LIST_STAT_MEAN, dil_s) + ", max=" +
                   (string) llListStatistics(LIST_STAT_MAX, dil_s) + ", std.dev=" +
                   (string) llListStatistics(LIST_STAT_STD_DEV, dil_s) + "\n" + 
                   "FPS: min="+(string) llListStatistics(LIST_STAT_MIN, fps_s) + ", mean=" +
                   (string) llListStatistics(LIST_STAT_MEAN, fps_s) + ", max=" +
                   (string) llListStatistics(LIST_STAT_MAX, fps_s) + ", std.dev=" +
                   (string) llListStatistics(LIST_STAT_STD_DEV, fps_s),
               <1.0, 1.0, 0.0>, //yellow
               1.0);
       }
   }
   
   changed(integer change)
   {
       if(change & CHANGED_REGION)
       {
           llResetScript();
       }
   }
}</lsl>

Notes

Given that this operation ignores any non-numbers in a list, it can be used to tell you, in a mixed list, how many of the elements in a list are numbers (when used with the LIST_STAT_NUM_COUNT parameter.)

See Also

Functions

•  llGetListEntryType

Deep Notes

Search JIRA for related Issues

Tests

•  llListStatistics Test

Signature

function float llListStatistics( integer operation, list src );