logistic regression

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Nirmal 2012-6-8

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评论： Runcong Kuang 2022-8-23

采纳的回答： Peter Perkins

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I am trying to use logistic regression, but when i execute the following line of code

betaHatNorm=mnrfit(data,class);

my betaHatNorm contains mostly Nan, any resaon it might do so? it also throws a warning regarding matrix

Warning: Matrix is singular to working precision.

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Peter Perkins 2012-6-11

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What most people mean by "logistic tregression" is a binomial response: number of "successes" vs. number of "failures". Unless you specifically need to fit a model for a multinomial response (more than just two response categories), I'd suggest you use glmfit.

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Peter Perkins 2012-6-13

"Unless you specifically need to fit a model for a multinomial response ..." mnrfit is both more and less general than glmfit, but it is simpler to use glmfit for (binomial) logistic regression.

Runcong Kuang 2022-8-23

Hi @Peter Perkins,

I am doing multinomial response using mnrfit.

I am getting the same warning.

How can I fix this?

Thanks.

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AI and Statistics Statistics and Machine Learning Toolbox Probability Distributions Discrete Distributions Multinomial Distribution

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