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

The function creates a plot from the results of the function `nPV`

.

1 |

`x` |
an object of class |

`NPVlty` |
single integer value, the linetype for NPV sample size, see |

`PPVlty` |
single integer value, the linetype for PPV sample size, see |

`...` |
further arguments to be passed to |

Required sample sizes for different experimental settings and prevalences, needed to achieve a prespecified power can be calculated in dependence of the proportion of true negative and true positive compounds in the validation set, using function `nPV`

. This function draws a plot with the proportion of true positives on x and the total sample size on y, combining all parameter settings in one plot.

Note that for huge numbers of setting this should not work.

A plot.

Frank Schaarschmidt

*Steinberg DM, Fine J, Chappell R (2009).* Sample size for positive and negaitive predictiove value in diagnostic research using case-control designs. Biostatoistics 10, 1, 94-105.

`plotnPV`

, for sample sizes for several settings in one figure

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