| mc.wdemingConstCV {mcrPioda} | R Documentation |
Calculate Weighted Deming Regression
Description
Calculate weighted Deming regression with iterative algorithm suggested by Linnet. This algorithm is available only for positive values. But even in this case there is no guarantee that the algorithm always converges.
Usage
mc.wdemingConstCV(X, Y, error.ratio, iter.max = 30, threshold = 1e-06)
Arguments
X |
measurement values of reference method. |
Y |
measurement values of test method. |
error.ratio |
ratio between squared measurement errors of reference- and test method, necessary for Deming regression (Default is 1). |
iter.max |
maximal number of iterations. |
threshold |
threshold value. |
Value
a list with elements
b0 |
intercept. |
b1 |
slope. |
xw |
average of reference method values. |
iter |
number of iterations. |
References
Linnet K. Evaluation of Regression Procedures for Methods Comparison Studies. CLIN. CHEM. 39/3, 424-432 (1993).
Linnet K. Estimation of the Linear Relationship between the Measurements of two Methods with Proportional Errors. STATISTICS IN MEDICINE, Vol. 9, 1463-1473 (1990).