# Rev Language Reference

## mvCorrelationMatrixElementSwap - Correlation Matrix element swap move.

Swaps elements i and j of the correlation matrix (i != j).

### Usage

mvCorrelationMatrixElementSwap(MatrixReal x, RealPos weight, Probability tuneTarget)

### Arguments

 x : MatrixReal ( pass by reference) The variable on which this move operates. 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

### Example


# we draw a correlation matrix from an LKJ distribution
R ~ dnLKJ(eta=1, dim=5)

# we specify an element swap move
moves[1] = mvCorrelationMatrixElementSwap(R)