Variance Function Program
Add a Grid to an Existing Plot.
Predict Method for Objects of Class 'modelEP17'.
(V)ariance (F)unction (P)rogram
Finding X-Value for Given Y-Value Using a Bisection-Approach.
Internal Function Model 3.
Internal Function Model 4.
Internal Function Model 4.
Internal Function Model 5.
Internal Function Model 5.
Internal Function Model 6.
Internal Function Model 6.
Internal Function Model 7.
Internal Function Model 7.
Internal Function Model 8.
Internal Function Model 8.
Internal Function Model 9.
Convert Color-Name or RGB-Code to Possibly Semi-Transparent RGB-code.
Back-Transformation of Estimated Coefficients.
Extract Model-Coefficients from VFP-Objects.
Condition-Handling Without Losing Information.
Determine C5 and C95 or any Concentration Cx.
Keep backward compatibility by assigning new to old function names whe...
Fit CLSI EP17 Model Using log-transformed X and Y.
Precision Performance Plot of Qualitative Tests.
Estimate (Im)Precision-Profiles Modeling the Relationship 'Var ~ Mean'...
Transform list of VCA-object into VFP-matrix required for fitting.
Select the Best Fitting Model.
Determine Monotony of Vector.
Add Legend to Right Margin.
Result of a Real-World Precsion Experiment on 10 Samples
Plot VFP-Ojbects.
Internal Function Model 2.
Internal Function Model 3.
Predict Method for Objects of Class 'VFP'.
Print Objects of Class 'VFP'
Residuals Method for Objects of Class 'VFP'.
Adapted Version of Function 'signif'
Summary Objects of Class 'VFP'
Transformation of Coefficients.
Variance function estimation for models proposed by W. Sadler in his variance function program ('VFP', www.aacb.asn.au/AACB/Resources/Variance-Function-Program). 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.