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Answers for “如何决定从曲线拟合模型中删除哪些变量?”

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You decide which variables to remove by examining their p-values. If a predictor variable has a p-value greater than a chosen significance level (commonly 0.05), it is considered not statistically significant.

Conditions: Significance level is typically set to 0.05.; The model includes multiple predictor variables with associated p-values.

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You can force your curve fit to respect physical limits by formulating it as a constrained optimization problem using the Optimization Toolbox. Define the model coefficients as optimization variables and assign specific lower and upper bounds to each coefficient.

Conditions: Requires an optimization solver like lsqnonlin.; Objective function must be defined based on the model equation (e.g., minimizing sum of squared errors).; Physical or mathematical constraints on coefficients are known.

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The Plot Slice window displays separate panels for each predictor variable in a fitted multi-factor model. To compare impacts, observe the steepness of the curve in each panel.

Conditions: A fitted model with multiple predictors is available.; The software can generate partial-effect style plots for each predictor.