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xiegangmai: ½ð±Ò-1, רҵ°æ¿é½»Á÷Ìù£¬ÇëÎð¹àË® 2012-11-18 19:07:36
2Â¥2012-11-18 17:16:16
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xiegangmai: ½ð±Ò+1, лл²ÎÓë 2012-11-20 21:31:34
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10^6*a/b*(1./(1+exp((c-x)/b)))
3Â¥2012-11-18 21:32:50
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yanshima

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4Â¥2012-11-19 07:03:58
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xiegangmai: ½ð±Ò+2, лл²ÎÓë 2012-11-20 21:31:41
General model:
     f(x) = 10^6*a*(1/(1+exp((x-c)/b)))
Coefficients (with 95% confidence bounds):
       a =  8.165e+004  (-8.512e+012, 8.512e+012)
       b =      -88.97  (-385, 207)
       c =        3071  (-9.275e+009, 9.275e+009)

Goodness of fit:
  SSE: 2.639e+006
  R-square: 0.8788
  Adjusted R-square: 0.8303
  RMSE: 726.5
showmethemoney
5Â¥2012-11-19 11:59:23
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xiegangmai: ½ð±Ò+2, лл²ÎÓë 2012-11-20 21:31:50
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Fit computation did not converge:
Fitting stopped because the number of iterations or function evaluations exceeded the specified maximum.

Fit found when optimization terminated:

General model:
     f(x) = 10^6*a*(1/(1+exp((x-c)/b)))
Coefficients (with 95% confidence bounds):
       a =  1.099e+004  (-1.959e+010, 1.959e+010)
       b =      -165.1  (-237.6, -92.61)
       c =        4016  (-2.942e+008, 2.942e+008)

Goodness of fit:
  SSE: 1.009e+005
  R-square: 0.9954
  Adjusted R-square: 0.9935
  RMSE: 142.1

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showmethemoney
6Â¥2012-11-19 12:03:17
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yanshima

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7Â¥2012-11-22 11:41:06
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xiegangmai: ½ð±Ò+1, ר¼Ò¿¼ºË, лл²ÎÓë 2012-11-24 20:34:27
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8Â¥2012-11-22 11:53:40
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