multinomial

Dirichlet Multinomial model in JAGS with categorical X

南楼画角 提交于 2021-02-08 10:01:13
问题 Can someone help with JAGS code for a Bayesian multinomial logistic model with one categorical X variable (Dirichlet prior)? My representative sample is the matrix "z" in the code below that represents the 3 outcomes and "site", in the bottom line of code, is the categorical x variable. I can get the code that estimates each of the 3 outcomes but I'm stumped on how to add a categorical X (hospital site). I would like to use the first outcome, z[, 1], as the reference and 'a' as the reference

Dirichlet Multinomial model in JAGS with categorical X

时光总嘲笑我的痴心妄想 提交于 2021-02-08 10:00:22
问题 Can someone help with JAGS code for a Bayesian multinomial logistic model with one categorical X variable (Dirichlet prior)? My representative sample is the matrix "z" in the code below that represents the 3 outcomes and "site", in the bottom line of code, is the categorical x variable. I can get the code that estimates each of the 3 outcomes but I'm stumped on how to add a categorical X (hospital site). I would like to use the first outcome, z[, 1], as the reference and 'a' as the reference

Assesing the goodness of fit for the multinomial logit in R with the nnet package

℡╲_俬逩灬. 提交于 2020-04-08 17:47:21
问题 I use the multinom() function from the nnet package to run the multinomial logistic regression in R. The nnet package does not include p-value calculation and t-statistic calculation. I found a way to calculate the p-values using the two tailed z-test from this page. To give one example of calculating a test statistic for a multinom logit (not really a t-stat, but an equivalent) I calculate the Wald's statistic: mm<-multinom(Empst ~ Agegroup + Marst + Education + State, data = temp,weight

Assesing the goodness of fit for the multinomial logit in R with the nnet package

人走茶凉 提交于 2020-04-08 17:47:12
问题 I use the multinom() function from the nnet package to run the multinomial logistic regression in R. The nnet package does not include p-value calculation and t-statistic calculation. I found a way to calculate the p-values using the two tailed z-test from this page. To give one example of calculating a test statistic for a multinom logit (not really a t-stat, but an equivalent) I calculate the Wald's statistic: mm<-multinom(Empst ~ Agegroup + Marst + Education + State, data = temp,weight

multinomial logistic multilevel models in R

痴心易碎 提交于 2020-01-30 13:45:05
问题 Problem: I need to estimate a set of multinomial logistic multilevel models and can’t find an appropriate R package. What is the best R package to estimate such models? STATA 13 recently added this feature to their multilevel mixed-effects models – so the technology to estimate such models seems to be available. Details: A number of research questions require the estimation of multinomial logistic regression models in which the outcome variable is categorical. For example, biologists might be

Fitted values for multinom in R: Coefficients for Reference Category?

眉间皱痕 提交于 2020-01-23 02:14:17
问题 I'm using the function multinom from the nnet package to run a multinomial logistic regression. In multinomial logistic regression, as I understand it, the coefficients are the changes in the log of the ratio of the probability of a response over the probability of the reference response (i.e., ln(P( i )/P( r ))=B 1 +B 2 *X... where i is one response category, r is the reference category, and X is some predictor). However, fitted(multinom(...)) produces estimates for each category, even the

How to interpret the output of choicemodelr (rhierMnlRwMixture) in R

送分小仙女□ 提交于 2020-01-14 01:58:06
问题 My Problem I just started using the R library 'choicemodelr' and succeded in getting some beta values as a solution. But I wonder how do I assign these values to the specific attribute-levels. As a result I only get values for A1B1, A1B2, A1B3,... etc. How does this generic output generally connect to my Design? Didn't find a hint in the documentation. Neither for the choicemodelr libraray, nor the bayesm library (rhierMnlRwMixture) to which it is connected to. I hope you can help me with