Function describing the standard deviation of the measurement error in dependence of the measured value $$y$$:

$$\sigma = \sqrt{ \sigma_{low}^2 + y^2 * {rsd}_{high}^2}$$

sigma_rl(y, sigma_low, rsd_high)

## Arguments

y The magnitude of the observed value The asymptotic minimum of the standard deviation for low observed values The coefficient describing the increase of the standard deviation with the magnitude of the observed value

## Value

The standard deviation of the response variable.

## References

Rocke, David M. und Lorenzato, Stefan (1995) A two-component model for measurement error in analytical chemistry. Technometrics 37(2), 176-184.