Calculates the root mean squared error (aka root mean squared deviation (RMSD)) function.

## Syntax

**RMSE**(

**X**,

**Y**,

**Ret_type**)

**X** is the original (eventual outcomes) time series sample data (a one dimensional array of cells (e.g. rows or columns)).

**Y** is the forecast time series data (a one dimensional array of cells (e.g. rows or columns)).

**Ret_type** is a switch to select the return output (1= RMSE (default), 2= NRMSE, 3= CV(RMSE)).

Order | Description |
---|---|

1 | RMSE (default) |

2 | Normalized RMSE (NRMSE) |

3 | Coefficient of Variation of the RMSE (CV(RMSE)) |

## Remarks

- The RMSE is also known as root mean squared deviation (RMSD).
- Please go to RMSD reference page for definition and notes.

## Files Examples

## References

- Please go to the RMSD reference page for references.

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