{"coeffs": [-1.6179954924139212e-07, 1.5417818346889487e-09, -0.33740659166633924, 0.045437465398445516], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [6.848786459675474e-08, 2.3140152875368217e-08, 0.07816749157388796, 0.06529159404190085], "covariance": [[4.690587597023412e-15, -2.265565262135791e-16, 3.663566921647178e-09, -2.9028767134570953e-09], [-2.26556526213579e-16, 5.35466675095412e-16, 2.6057357835220787e-10, 4.80905157969585e-10], [3.6635669216471787e-09, 2.6057357835220776e-10, 0.0061101567389538446, -0.0019845964520140928], [-2.9028767134570953e-09, 4.809051579695851e-10, -0.001984596452014092, 0.004262992252532382]]}