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VFP (version 1.0)

Variance Function Program

Description

Variance function estimation for models proposed by W. Sadler in his variance function program ('VFP', ). Here, the idea is to fit multiple variance functions to a data set and consequently assess which function reflects the relationship 'Var ~ Mean' best. For 'in-vitro diagnostic' ('IVD') assays modeling this relationship is of great importance when individual test-results are used for defining follow-up treatment of patients.

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Version

Install

install.packages('VFP')

Monthly Downloads

356

Version

1.0

License

GPL (>= 2)

Maintainer

Andre Schuetzenmeister

Last Published

July 31st, 2018

Functions in VFP (1.0)

VFP-package

(V)ariance (F)unction (P)rogram
legend.rm

Add Legend to Right Margin.
RealData1

Result of a Real-World Precsion Experiment on 10 Samples
conditionHandler

Condition-Handling Without Losing Information.
coef.VFP

Extract Model-Coefficients from VFP-Objects.
summary.VFP

Summary Objects of Class 'VFP'
powfun6

Internal Function Model 6.
bt.coef

Back-Transformation of Estimated Coefficients.
powfun5simple

Internal Function Model 5.
Signif

Adapted Version of Function 'signif'
fit.vfp

Estimate (Im)Precision-Profiles Modeling the Relationship 'Var ~ Mean'.
powfun3simple

Internal Function Model 3.
plot.VFP

Plot VFP-Ojbects.
getMat.VCA

Transform list of VCA-object into VFP-matrix required for fitting.
predict.VFP

Predict Method for Objects of Class 'VFP'.
predict.modelEP17

Predict Method for Objects of Class 'modelEP17'.
powfun4

Internal Function Model 4.
fit.EP17

Fit CLSI EP17 Model Using log-transformaed X and Y.
powfun5

Internal Function Model 5.
powfun4simple

Internal Function Model 4.
predictMean

Finding X-Value for Given Y-Value Using a Bisection-Approach.
powfun7simple

Internal Function Model 7.
print.VFP

Print Objects of Class 'VFP'
t.coef

Transformation of Coefficients.
powfun2simple

Internal Function Model 2.
powfun6simple

Internal Function Model 6.
powfun7

Internal Function Model 7.
powfun3

Internal Function Model 3.
powfun8

Internal Function Model 8.
powfun8simple

Internal Function Model 8.
powfun9simple

Internal Function Model 9.
addGrid

Add a Grid to an Existing Plot.
as.rgb

Convert Color-Name or RGB-Code to Possibly Semi-Transparent RGB-code.
B2mIntra_98

Example Data B2mIntra_98.VFP (Beta-2-microglobulin RIA) from the Variance Function Program 12.0 from Sadler
ReproData

Serum Work Area Example Data of a Reproducibility Experiment
Glucose

Example Data Glucose.VFP from the Variance Function Program 12.0 from Sadler
T4S9_99

Example Data T4S9_99.VFP (T4 RIA) from the Variance Function Program 12.0 from Sadler
MultiLotReproResults

Result of a Real-World Precsion Experiment on 10 Samples