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[求助]
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(shù)據(jù)的非線性模擬,得到這些數(shù)據(jù)所模擬的曲線中預(yù)測值與實(shí)際值的差異,參考了上面文獻(xiàn)中的方法,Systat software 我也有,但是因?yàn)橐郧皼]用過,不知道怎么輸入數(shù)據(jù)及選擇相應(yīng)的公式進(jìn)行模擬,自己試了好些次也沒成功,希望高人給予指點(diǎn)!萬分感謝!附件中有相關(guān)參考文獻(xiàn)中的非線性分析方法,請參考! |
榮譽(yù)版主 (文壇精英)
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專家經(jīng)驗(yàn): +518 |
鐵桿木蟲 (職業(yè)作家)
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您說的1stOpt我沒下載到,我其實(shí)是想把一組符合正態(tài)分布的數(shù)據(jù)通過非線性回歸給擬合出來,不知道具體的函數(shù)選擇和參數(shù)需要怎么規(guī)定,這些軟件應(yīng)該都有些通用的功能,您幫我看看我上傳的截圖,用的是systat軟件看看能有什么注意的? |
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