Starting Values

Model:  y = f(x;beta) + e  =  beta(1) - beta(2)x - (arctan[(beta(8) / (x - beta(4))]) pi) + e

Starting Values

Parameter
Start 1 Start 2 Start 3
beta(1) 1.0000000000E-01 2.0000000000E-01 2.0196866396E-01
beta(2) -1.0000000000E-05 -5.0000000000E-06 -6.1953516256E-06
beta(3) 1.0000000000E+03 1.2000000000E+03 1.2044556708E+03
beta(4) -1.0000000000E+02 -1.5000000000E+02 -1.8134269537E+02