I am looking to perform a backward feature selection process on a logistic regression with the AUC as a criterion. For building the logistic regression I used the scikit library, but unfortunately this library does not seem to have any methods for backward feature selection. My ...
代码实现 defstepwise(x,y,alpha=0.05):#这里的x为所有的自变量,y为因变量,x和y都需为Series或者Dataframe格式x_const=sm.add_constant(x)#statsmodels库在进行最小二乘法计算时需要自变量有一列常数(const)值1来提高运算的准确性predictors=[x_const.columns[0]]#这里表示p值小于α的自变量索引,开始只有'const...
Best Subset Selection, Forward Stepwise, Backward Stepwise Classes in sk-learn style. - xinhe97/StepwiseSelectionOLS
df = dataset("datasets", "swiss")[2:end] stepwise(df, :Fertility, true, false) stepwise(df, :Fertility, true, true) stepwise(df, :Fertility, false, true) stepwise(df, :Fertility, false, false) (all options return the same model and are consistent with a reference example in R)...
Stepwise linear regression analysis (backward selection) to study the independent variables predicting MMPs in FH subjects.Morten, Hjuler NielsenHelle, IrvineSimon, VedelBent, RaungaardHenning, BeckNielsenAase, Handberg
Best Subset Selection, Forward Stepwise, Backward Stepwise Classes in sk-learn style. This package is compatible to sklearn. Examples onPipelineandGridSearchCVare given. ForwardStepwiseOLS 2020-04-19 Hyperparameter fK: at mostfKnumber of features are selected ...
Additional variables of sex, BMI, and time since injury did not significantly contribute to the model and were not included by the forward stepwise selection process. Fig. 2 Linear regressions of overground walking tests on maximum walking propulsion force (MWPF) obtained on the robotic treadmill....
Since variable selection is important in quantitative structure property/activity studies, in this paper comparison between the genetic algorithm and several common methods such as forward method, backward elimination and stepwise regression is performed. 鉴于变量选择在 QSAR/QSPR研究中的重要性 ,比较了遗...
而Adjusted R^2=MST/MSE,其中SST自由度是n-1,SSR自由度是k,则SSE自由度是n-k-1。 多重相关系数(multiple correlation coefficient) 又称复相关系数是因变量与所有自变量之间的关系。而相关关系是两两之间的关系。 因为:T(n)=(f(1,n))^1/2所以...
Performance of using multiple stepwise algorithms for variable selection Three popular SVS algorithms were tested (backward elimination, forward selection, and stepwise) on three statistical methods (linear, logistic, and Cox ... RE Wiegand - 《Statistics in Medicine》 被引量: 83发表: 2010年 Compute...