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...trapge" to calculate (and compare) the generalization error of several bootstrap implementations: ## ## Calculates and returns a coefficient corresponding to the generalization ## error. The formula for the bootstrap generalization error is: ## $N^{-1}\sum_{i=1}^n B^{-1}\sum_{j=1}^B |y_i - (\beta_n^{*j})^T x|$ ## ## x - mxn matrix where m is the number of model parameters and n is the ## number of observations ## y - n column-vector containing true values ## theta_star - mxn matrix where m is the number of bootstrapped samples ## and n is the number of model parameters ##...

Dear All, I have a binomial response with one continuous predictor (d) and one factor (g) (8 levels dummy-coded). glm(resp~d*g, data, family=binomial) Y=b0+b1*X1+b2*X2 ... b7*X7 how can I get the inflection point per group, e.g., P(d)=.5 I would be grateful for any help. Thanks in advance, Ren?