Rsq: R-square value of a fitted model
In qpcR: Modelling and Analysis of Real-Time PCR Data

Description Usage Arguments Details Value Author(s) Examples

Calculates the R^2 value for objects of class nls, lm, glm, drc or any other models from which fitted and residuals can be extracted. Since version 1.2-9 it calculates a weighted R^2 if the object has an item object$weights containing weighting values.

1	Rsq(object)

object

a fitted model.

Uses the most general definition of R^2:

R^2 \equiv 1 - \frac{RSS}{TSS}

where

RSS = ∑_{i=1}^{n}w_i \cdot (y_i-\hat{y}_i)^2

and

TSS = ∑_{i=1}^{n}w_i \cdot (y_i - \bar{y})^2

using the weighted mean

\bar{y} = \frac{∑_{i=1}^{n}w_ix_i}{∑_{i=1}^{n}w_i}

The R^2 value of the fit.

Andrej-Nikolai Spiess

1 2	m1 <- pcrfit(reps, 1, 2, l5) Rsq(m1)

Loading required package: MASS
Loading required package: minpack.lm
Loading required package: rgl
Loading required package: robustbase
Loading required package: Matrix
Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE 
3: .onUnload failed in unloadNamespace() for 'rgl', details:
  call: fun(...)
  error: object 'rgl_quit' not found 
[1] 0.9997843