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Difference between revisions of "Logistic regression"
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===Ordered LR=== | ===Ordered LR=== | ||
If the dependent variable is categorical and can be ordered in a meaningful way (e.g. ''Grade 1'', ''Grade 2'', ''Grade 3''), ''ordered logistic regression'' is used.<ref>Ordinal Logistic Regression | R Data Analysis Examples. UCLA. URL: [https://stats.idre.ucla.edu/r/dae/ordinal-logistic-regression/ https://stats.idre.ucla.edu/r/dae/ordinal-logistic-regression/]. Accessed on: March 24, 2018</ref> | If the dependent variable is categorical and can be ordered in a meaningful way (e.g. ''Grade 1'', ''Grade 2'', ''Grade 3''), ''ordered logistic regression'' is used.<ref>Ordinal Logistic Regression | R Data Analysis Examples. UCLA. URL: [https://stats.idre.ucla.edu/r/dae/ordinal-logistic-regression/ https://stats.idre.ucla.edu/r/dae/ordinal-logistic-regression/]. Accessed on: March 24, 2018</ref> | ||
==Convergence== | |||
If an individual predictor variable is ''not'' predictive (e.g. one pathologist never calls a diagnosis) the data has ''complete separation'' and will not converge. | |||
==GNU/Octave example== | ==GNU/Octave example== | ||