Printing summary of non-linear model fits

This method produces formatted output of the summary statistics: parameter estimates, estimated standard errors, z-test statistics and corresponding p-values.

Usage

# S3 method for class 'summary.drc'
print(x, ...)

Arguments

x

an object of class 'drc'.

...

additional arguments.

Value

The object (argument x) is returned invisibly.

Author

Christian Ritz

Examples

ryegrass.m1 <- drm(rootl~conc, data=ryegrass, fct= LL.4())

summary(ryegrass.m1)
#> 
#> Model fitted: Log-logistic (ED50 as parameter) (4 parms)
#> 
#> Parameter estimates:
#> 
#>               Estimate Std. Error t-value   p-value    
#> b:(Intercept)  2.98222    0.46506  6.4125 2.960e-06 ***
#> c:(Intercept)  0.48141    0.21219  2.2688   0.03451 *  
#> d:(Intercept)  7.79296    0.18857 41.3272 < 2.2e-16 ***
#> e:(Intercept)  3.05795    0.18573 16.4644 4.268e-13 ***
#> ---
#> Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
#> 
#> Residual standard error:
#> 
#>  0.5196256 (20 degrees of freedom)