Hi Scott,<br>here I copy a part of the report:<br><br>Independent points          =       6.222656250<br>Number of variables         =       4.000000000<br>Chi-square                  =     247.145092496<br>Reduced Chi-square          =     111.193574128<br>
R-factor                    =       0.017422216<br><br>Guess parameters +/- uncertainties  (initial guess):<br>  amp             =     6.7815290   +/-      1.4687660    (1.0000)<br>  enot            =     2.2173620   +/-      2.1499920    (0.0000)<br>
  delr            =     0.0514640   +/-      0.0163900    (0.0000)<br>  ss              =     0.0074020   +/-      0.0025220    (0.0030)<br><br>I see that the R-factor is pretty good, 1.74%, amp is high cause is correlated with the coordination number and always have big errors., delr has the error of the total distance, so it is ok, but ss and enot have a a really big error, is this normal? <br>
Thanks, euG<br>