DrawCurves_srsc

An S4 object of class <code> <a rd-options="" href="/link/stanfitExtended?package=BayesianFROC&version=1.0.0" data-mini-rdoc="BayesianFROC::stanfitExtended">stanfitExtended</a></code> which is an inherited class from the S4 class <code>stanfit</code>.
This R object is a fitted model object
 as a return value of the function <code><a rd-options="" href="/link/fit_Bayesian_FROC?package=BayesianFROC&version=1.0.0" data-mini-rdoc="BayesianFROC::fit_Bayesian_FROC">fit_Bayesian_FROC</a>()</code>.
To be passed to <code><a rd-options="" href="/link/DrawCurves?package=BayesianFROC&version=1.0.0" data-mini-rdoc="BayesianFROC::DrawCurves">DrawCurves</a>()</code> ... etc

StanS4class

An integer, for the color of background and etc.

type

type_to_be_passed_into_plot

Logical: <code>TRUE</code> of <code>FALSE</code>. If <code>TRUE</code> (default), then title of curves are drawn.

title

TRUE of FALSE. If TRUE, then the cumulative false and hits are specified with its confidence level.

indexCFPCTP

A non-negative real number. This is a upper bound for the axis of the horisontal coordinate of FROC curve.

upper_x

A non-negative real number. This is a upper bound for the axis of the vertical coordinate of FROC curve.

upper_y

A non-negative real number. This is a lower bound for the axis of the horisontal coordinate of FROC curve.

lower_X

A non-negative real number. This is a lower bound for the axis of the vertical coordinate of FROC curve.

lower_y

Logical: <code>TRUE</code> of <code>FALSE</code>. If TRUE (default), then open a new device to draw curve.
Using this we can draw curves in same plain by new.imaging.device=FALSE.

new.imaging.device

Logical: <code>TRUE</code> of <code>FALSE</code>. Whether the (A)FROC curve is to be drawn by using color of dark theme. The Default value is a <code>TRUE</code>.

Drawcol

Logical: <code>TRUE</code> of <code>FALSE</code>. Whether or not FROC curves are shown.

DrawFROCcurve

Logical: <code>TRUE</code> of <code>FALSE</code>. Whether or not AFROC curves are shown.

DrawAFROCcurve

Logical: <code>TRUE</code> of <code>FALSE</code>. Whether or not the pairs of FPF and TPF are shown.

DrawCFPCTP

TRUE or FALSE. If true, then to plot the cumulative false positives and true positives the plot points is depicted by two way, one is a large circle and one is a small circle. By see the small circle, user can see the more precise position of these points.

Draw.inner.circle.for.CFPCTPs

TRUE of FALSE. If TRUE then area under the AFROC curves are painted.

DrawAUC

Draw an FROC curves and an AFROC curves.

Provides new methods for the so-called Free-response Receiver Operating Characteristic (FROC) analysis. The ultimate aim of FROC analysis is to compare observer performances, which means comparing characteristics, such as area under the curve (AUC) or figure of merit (FOM). In this package, we only use the notion of AUC for modality comparison, where by "modality",  we mean imaging methods such as Magnetic Resonance Imaging (MRI), Computed Tomography (CT), Positron Emission Tomography (PET), ..., etc. So there is a problem that which imaging method is better to detect lesions from shadows in radiographs. To solve modality comparison issues, this package provides new methods using hierarchical Bayesian models proposed by the author of this package. Using this package, one can obtain at least one conclusion that which imaging methods are better for finding lesions in radiographs with the case of your data. Fitting FROC statistical models is sometimes not so good, it can easily confirm by drawing FROC curves and comparing these curves and the points constructed by False Positive fractions (FPFs) and True Positive Fractions (TPFs), we can validate the goodness of fit intuitively. Such validation is also implemented by the Chi square goodness of fit statistics in the Bayesian context which means that the parameter is not deterministic, thus by integrating it with the posterior predictive measure, we get a desired value. To compare modalities (imaging methods: MRI, CT, PET, ... , etc),  we evaluate AUCs for each modality. FROC is developed by Dev Chakraborty, his FROC model in his 1989 paper relies on the maximal likelihood methodology. The author modified and provided the alternative Bayesian FROC model. Strictly speaking, his model does not coincide with models in this package. In FROC context, we means by multiple reader and multiple case (MRMC) the case of the number of reader or modality is two or more. The MRMC data is available for functions of this package. I hope that medical researchers use not only the frequentist method but also alternative Bayesian methods. In medical research, many problems are considered under only frequentist methods, such as the notion of p-values. But p-value is sometimes misunderstood. Bayesian methods provide very simple, direct, intuitive answer for research questions. Combining frequentist methods with Bayesian methods, we can obtain more reliable answer for research questions. References: Dev Chakraborty (1989) Maximum likelihood analysis of free - response receiver operating characteristic (FROC) data.

Issei Tsunoda

BayesianFROC

FROC Analysis by Bayesian Approaches

DrawCurves_srsc function

An S4 object of class <code> <a rd-options='' href='stanfitExtended'>stanfitExtended</a></code> which is an inherited class from the S4 class <code>stanfit</code>.
This R object is a fitted model object
 as a return value of the function <code><a rd-options='' href='fit_Bayesian_FROC'>fit_Bayesian_FROC</a>()</code>.
To be passed to <code><a rd-options='' href='DrawCurves'>DrawCurves</a>()</code> ... etc

DrawCurves_srsc: Draw the FROC curves

Description

Usage

Arguments