  In the many fields in which the Ising model is applied nowadays, the spin
variables are often assumed to be of spin-class $\{-1,1\}$ or $\{0,1\}$, even
though for any mix of binary real valued spin-classes a proper Ising model
distribution exists. Here we show that in their basis all these spin-classes
are the same, as a simple expressions exist that allow us to transform the
variables from one particular mix of spin-classes to any other combination,
without changing the probabilities for the system states as a whole.
