# Rev Language Reference

## mvMixtureAllocation

### Usage

mvMixtureAllocation(Real x, Natural delta, RealPos weight, Probability tuneTarget)

### Arguments

 x : Real ( pass by reference) The variable on which this move operates. delta : Natural (pass by value) The window of how many categories to propose left and right. Default : 0 weight : RealPos (pass by value) The weight how often on average this move will be used per iteration. Default : 1 tuneTarget : Probability (pass by value) The acceptance probability targeted by auto-tuning. Default : 0.44