// Swarm library. Copyright © 1996-2000 Swarm Development Group.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// 
// The Swarm Development Group can be reached via our website at:
// http://www.swarm.org/

#import <analysis.h> // Averager
#import <objectbase/MessageProbe.h>

// Average object: calculates a few basic statistics given a collection of 
// objects to poll and a selector with which to poll them.

@interface Averager: MessageProbe <Averager>
{
  double total, totalSquared; 
  double max, min;
  unsigned count, totalCount;
  id target;
  BOOL isList;

  unsigned maWidth;
  double maTotal;
  double maTotalSquared;
  double *maData;

  id (*nextImp) (id, SEL);
  id (*getLocImp) (id, SEL);
  double (*callImp) (id, SEL, id);
  void (*addImp) (id, SEL, double);
}

- setCollection: aCollection;
- setWidth: (unsigned)width;
- createEnd;		

- (void)update;					  // update the average.
- (double)getAverage;
- (double)getMovingAverage;
- (double)getVariance;
- (double)getMovingVariance;
- (double)getStdDev;
- (double)getMovingStdDev;
- (double)getTotal;
- (double)getMax;
- (double)getMin;
- (unsigned)getCount;
@end