[R] AUC/Volume under the surface

[Rehena Sultana]

Dear Members,I am having trouble in plotting a 3D ROC curve based on multinomial logistic regression. I am also interested in finding AUC/Volume under the surface based on final multivariate model. I do have an interaction term in my final model. 
I tried using "HUM" library. But I failed to figure out how to include interaction term in the model. 
Looking forward for any help. Appreciate your help in advance. 
Regards,rehena
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