User-defined transforms – useful feature of SigmaPlot

SigmaPlot ́s unique feature of using custom-made transforms not only allows various convenient calculations with data in a worksheet but also enables the construction of theoretical curves, for example. The latter was an argument for using this program in dose-response curve studies in the field of pharmacology [1, 2] first and in toxicology [3], more recently. To illustrate how useful working with user-defined transforms is, we want to give a few examples here.