Fit Results (Custom Function)

$\displaystyle A*atan(B*x+C)+D$
PARAMETER         NOTE                                 VALUE             ERROR            
A                 --                                  -1.0672819242e+09 5.0008402280e+12  
B                 --                                  8.7273541620e+09  4.7219961291e+13  
C                 --                                  1.8402469481e+09  0                 
D                 --                                  1.6764826192e+09  7.8553014611e+12  

Reduced Chi-Squared = 1381.76





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