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%% Determine Observations Influential on Coefficients Using Dfbetas % This example shows how to determine the observations that have large influence % on coefficients using |Dfbetas|. Load the sample data and define the % response and independent variables. % Copyright 2015 The MathWorks, Inc. load hospital y = hospital.BloodPressure(:,1); X = double(hospital(:,2:5)); %% % Fit a linear regression model. mdl = fitlm(X,y); %% % Find the |Dfbetas| values that are high in absolute value. [row,col] = find(abs(mdl.Diagnostics.Dfbetas)>3/sqrt(100)); disp([row col])