Description Usage Arguments Details Value Author(s) References See Also Examples

To compute the nonparametric kernel estimate of receiver operating characteristic (ROC) Curves for continuous data.

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`x` |
numeric vector. |

`y` |
numeric vector. |

`bw.x` |
the smoothing bandwidth of |

`bw.y` |
the smoothing bandwidth of |

`adjust` |
the parameter for adjusting the bandwidth. The bandwidth used for the estimate is actually |

`kernel` |
a character string giving the smoothing kernel to be used. This must be either “normal” or “epanechnikov”. By default, the normal kernel is used. |

`xgrid` |
the user-defined data points at which the CDF is to be evaluated. If missing, the CDF will be evaluated at the equally spaced points defined within the function. |

`ngrid` |
the number of equally spaced points at which the density is to be estimated. |

`from` |
the left-most points of the grid at which the density is to be estimated. |

`to` |
the right-most points of the grid at which the density is to be estimated |

`cut` |
by default, the values of from and to are cut bandwidths beyond the extremes of the data. |

`na.rm` |
logical; if |

`...` |
further arguments for methods. |

estimate the nonparametric kernel estimate of receiver operating characteristic (ROC) Curves for continuous data

An object of class “ROC”.

`FPR` |
the false positive rate. |

`TPR` |
the true positive rate. |

`bw.x, bw.y` |
the bandwidths used. |

`nx, ny` |
the sample sizes after elimination of missing values. |

`call` |
the call which produced the result. |

`x.data.name, y.data.name` |
the deparsed names of the |

`x.has.na, y.has.na` |
logical; if |

The `print`

method reports `summary`

values on the `x`

and `Fhat`

components.

X.F. Wang wangx6@ccf.org

Lloyd, C.J. (1998). Using smoothed receiver operating characteristic curves to summarize and compare diagnostic systems. *Journal of the American Statistical Association*, 93(444): 1356-1364.

Zhou, X.H. and Harezlak, J. (2002). Comparison of bandwidth selection methods for kernel smoothing of ROC curves. *Statistics in Medicine*, 21, 2045-2055.

Zou, K.H., Hall, W.J., and Shapiro, D.E. (1997). Smooth non-parametric receiver operating characteristic (ROC) curves for continuous diagnostic tests. *Statistics in medicine*, 16(19): 2143-56.

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