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 |

sigma_low |
The asymptotic minimum of the standard deviation for low observed values |

rsd_high |
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.