# Tagged Questions

5 views

### Plotting a ROC curve from a random forest classification [migrated]

I'm trying to plot ROC curve of a random forest classification. Plotting works, but I think I'm plotting the wrong data since the resulting plot only has one point (the accuracy). This is the code I ...
206 views

### Why does my ROC curve look like this (is it correct?)

I have a ROC curve generated for a multivariate logistic regression. Does it look correct? This is what I've done: Solve $\theta_0 + \theta_1X_1 + \theta_2X_2 ... = Y$ for the $\theta$s Iterate ...
365 views

### Precision - Recall: Graphical Representation

I'm a little bit confused with precision recall. I read some papers about recommender systems, where in one paper they have a graphical representation and in other papers they don't (they just have ...
195 views

### Replicating a plot from the ROCR Website

I'm trying to reproduce this plot from the ROCR website: I can get something similar as follows: ...
1k views

### How to plot ROC curve with TP, FP and FN alone with different thresholds?

I want to plot a ROC for my detection algorithm which is used to detect features in image. I had obtained true positive, false positive and false negative from the algorithm. There is no true ...
4k views

### How to determine best cutoff point and its confidence interval using ROC curve in R?

I have the data of a test that could be used to distinguish normal and tumor cells. According to ROC curve it looks good for this purpose (area under curve is 0.9): My questions are: How to ...
624 views

### Plotting overlaid ROC curves

I'm trying to make overlaid ROC curves to represent successive improvements in model performance when particular predictors are added one at a time to the model. I want one ROC curve for each of about ...
396 views

### Combining classifiers by flipping a coin

I am studying a machine learning course and the lecture slides contain information what I find contradicting with the recommended book. The problem is the following: there are three classifiers: ...