# [R] two kind of Hosmer and Lemeshow’s test

From: leo_wa <kwngai6022_at_hotmail.com>
Date: Fri, 07 Nov 2008 05:31:53 -0800 (PST)

I know that there are two method to apply the Hosmer and Lemeshow’s. One of them is calculated based on the fixed and pre-determined cut-off points of the estimated probability of success. One of them is calculated based on the percentiles of estimated probabilities. In the previous post,i find that the Hosmer and Lemeshow’s test how to use in R.
hosmerlem <-
function (y, yhat, g = 10)
{

cutyhat <- cut(x, breaks = quantile(yhat, probs = seq(0,

1, 1/g)), include.lowest = T)
obs <- xtabs(cbind(1 - y, y) ~ cutyhat)     expect <- xtabs(cbind(1 - yhat, yhat) ~ cutyhat)     chisq <- sum((obs - expect)^2/expect)     P <- 1 - pchisq(chisq, g - 2)
c("X^2" = chisq, Df = g - 2, "P(>Chi)" = P) }
I want to know how can i use the another method which is not use the probability of success. i want to know how can i revise above program to achieve an objective.

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