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非線性回歸分析 已有1人參與
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Non-linear least squares regression was initially used to fit some distributions of log2-transformed data to a range of symmetrical ‘bell-shaped’ theoretical population distributions. This technique was also applied to theoretical cumulative distributions of the same data. Regression was conducted in Systat software v.10.2 (Systat, Richmond, CA, USA). Nonlinear least squares regression was then employed to fit cumulative log2-transformed distributions to the normal cumulative function (ZCF). Three parameters were estimated, the mean and standard deviation (both log2), and the total number (N) in the presumed unimodal distribution. N was estimated rather than taken as a constant in the regression, because of the desire to fit the data to the distribution without assuming that N truly contained only wild-type isolates. 我最近要做一些數據的非線性模擬,得到這些數據所模擬的曲線中預測值與實際值的差異,參考了上面文獻中的方法,Systat software 我也有,但是因為以前沒用過,不知道怎么輸入數據及選擇相應的公式進行模擬,自己試了好些次也沒成功,希望高人給予指點!萬分感謝!附件中有相關參考文獻中的非線性分析方法,請參考! |
鐵桿木蟲 (職業(yè)作家)
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