Re: sampling from an uniform with a minimum distance between the

["David L Lorenz" <lorenz@usgs.gov>]

Melina,
  I am not sure that this simple approach gives a uniform distribution. I
believe that the random numbers that are selected using that procedure
results in a higher number of values that are close to the limits of the
distribution. This effect is more pronounced as the spacing gets to be a
larger proportion of the limits of the distribution. If it is very small,
then the effect is negligible.
  Sorry, I do not have an unbiased method.
Dave



                                                                                
                                                  
                      carcappe@unina.it                                         
                                                  
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                      t.wustl.edu                      Subject:  [S] sampling 
from an uniform with a minimum distance between the 
                                                        sampled values          
                                                  
                                                                                
                                                  
                      11/21/2004 10:59 AM                                       
                                                  
                                                                                
                                                  
                                                                                
                                                  





Many thanks to  Henrik Nielsen, James Hotlman, Simon Rosenfeld and Alan
Gross
for replaying to my message.
A special thank to Juhlin Kenton and Greg Snow who gave me the right hint
to
sort the problem out.
the right script is
if (min(range(diff(sort(x))))<c)

melina

Carmela Cappelli
Department of Statistics, School of Political Science
University of Naples Federico II
phone: +39-081-2537553
fax:+39-081-2537466



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