The Fractionator Principle. The fractionator principle is one of the important concepts used in stereology. The importance of this principle cannot be overlooked. It appears in many different places. Although it looks different depending on how it is used, the principle is the same.
In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = Ïr2, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.
A variable is an entity which changes in a given system. Consider a simple example of a moving particle through space. In such a case, entities such as time, distance travelled by the particle, the direction of travelling are called variables. There are two main types of variables in a given experiment.