# nodalArray¶

A nodalArray is a distributed array. This means during parallel runs the array is distributed across the different MPI domains. The nodalArray knows how to synchronize domain boundaries.

## Parameters¶

numComponents (integer)
Defines the number of components in the distributed array. Solving the Euler equations requires 5 variables per grid point so in this case numComponents=5.
useEpetraVector (boolean)
Use an Epetra compatible version of the nodal component array. Required if the data structured is used as an input/output vector for implicitMultiUpdater (1d, 2d, 3d)

## Example¶

<DataStruct q>
kind = nodalArray
onGrid = domain
numComponents = 18
</DataStruct>