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undersanding Histogram function

Hi Bill and All,
I made this small program to test the Histogram function. what it does is to generate 10000 random numbers and get the histogram. I was expecting to have more or less the same number of points per bin but I am having only a half of the points in the first and last "interval".
May be I am either making a wrong interpretation of the results or I am giving the wrong input to the program. 

Thanks again,
Ricardo Mantilla
University of Colorado at Boulder


import visad.*;
import visad.java2d.DisplayImplJ2D;
import java.rmi.RemoteException;
import java.awt.Font;

public class testHisto extends java.lang.Object {

  /** Creates new testHisto */
  public testHisto()  throws RemoteException, VisADException{
RealType numLinks = RealType.Generic; 
      RealType distanceToOut = RealType.Generic;
FunctionType func_distanceToOut_numLinks = new FunctionType(distanceToOut, numLinks); 

      Linear1DSet distanceToOut_set = new Linear1DSet(0, 1, 10000);

      float[][] NumL_vals = new float[1][10000];
      for (int i=0;i<10000;i++) NumL_vals[0][i]=(float) Math.random();
FlatField vals_ff = new FlatField( func_distanceToOut_numLinks, distanceToOut_set); 
      vals_ff.setSamples( NumL_vals );
Linear1DSet bins = new Linear1DSet(0, 1, 11); FlatField hist = visad.math.Histogram.makeHistogram(vals_ff, bins); float[][] otra=bins.getSamples(); 
      double[][] algo=hist.getValues();
for (int i=0;i<algo[0].length;i++) System.out.println(otra[0][i]+" "+algo[0][i]); } 

  /**
  * @param args the command line arguments
  */
  public static void main (String args[]){
      try{
          new testHisto();
      } catch (VisADException v){
          System.err.println(v);
      } catch (RemoteException r){
          System.err.println(r);
      }
  }
}
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