# At Reference Signal Value

Captures the value of a given expression when a given reference signal expression achieves a certain value (reference signal value).

Input | Description |
---|---|

Response Expression | The function that is to be computed. |

Reference Signal Expression | The function at which the Response expression is desired. |

Reference Signal Value | A value of Reference Signal Expression at which Response expression must be computed. |

Reference Signal Tolerance | A small interval around the desired Reference Signal Value required for computation. |

In the above example, the response variable captures the value of the expression that measures difference in YAW positions when the Reference signal (measuring angular rotation between 2 markers) value is zero.