Hoe can I combine 2 different ROC curves in same plot in R?

02 February 2019 1 440 Report

I have ROCs of 2 different outputs, I can ave two different graphs fro both the outputs. But, I want to show the curves in same graph.

Stephen Politzer-Ahles

I don't know how your curves were originally calculated. But assuming you have each represented as its own object (a vector of values or something like that), there are many ways to plot two lines/curves on the same graph. One is using the matplot() function. Another is to plot one line using the plot() function and then add the same line using the lines() function. A third option is to use the ggplot2() package, which I understand has many options for building plots incrementally like this.

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