====== Metric Sum ======

The **Metric_Sum** command will sum the signal components over a range from a Start event to End event.

The command details are:

|**Metric_Sum**                                                                                         |                                                                                                 |
|**/Signal_Types=**                                                                                     |The type of signal to be processed                                                               |
|**/Signal_Names=**                                                                                     |The name of the signal to be processed                                                           |
|**/Signal_Folder**                                                                                     |The folder of the signal to be processed                                                         |
|**/Signal_Components=**                                                                                |The component of the signal to be processed                                                      |
|**/[[Visual3D:Documentation:C3D_Signal_Types:EVENT_LABEL_Data_Type#Event_Sequence|Event_Sequence]]=**  |The Start and End labels                                                                         |
|**/[[Visual3D:Documentation:C3D_Signal_Types:EVENT_LABEL_Data_Type#Exclude_Events|Exclude_Events]]=**  |Exclude ranges containing this event                                                             |
|**/[[Visual3D:Documentation:Pipeline:Metric_Commands:SEQUENCE_PERCENT_START|SEQUENCE_PERCENT_START]]=**|Within the event sequence specify the beginning of the range as a percent                        |
|**/[[Visual3D:Documentation:Pipeline:Metric_Commands:SEQUENCE_PERCENT_START|SEQUENCE_PERCENT_END]]=**  |Within the event sequence specify the end of the range as a percent                              |
|**/Result_Metric_Name=**                                                                               |The name of the resulting signal                                                                 |
|**/Result_Metric_Folder=**                                                                             |The folder of the resulting signal.                                                              |
|**/Apply_As_Suffix_To_Signal_Name=**                                                                   |Apply a suffix to the Signal_Name                                                                |
|**/Generate_Mean_And_STDDEV=**                                                                         |Generate the mean and standard deviation both within each active file and across all active files|
|**/Append_To_Existing_Values=**                                                                        |Append the results to an existing signal.                                                        |
|**;**                                                                                                  |                                                                                                 |

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The **Metric_Sum** command dialog is below:

{{:Metric_Sum.jpg}}

==== Metric Sum Examples ====

  - An example of the command **Metric_Sum** is found [[Visual3D:Documentation:Pipeline:Expressions:Expressions_Overview#Example:_Value_of_signal_at_an_analog_frame|here]]. This script uses metric_sum command to find a signal value at the analog frame rate. For details go to the page.
  - An example can be found on [[Visual3D:Documentation:Statistics:Compute_Linear_Regression#Linear_Regression_Explicit_Meta-Command|Statistics Example 4#Linear_Regression_Explicit Meta-Command]] where the meta-command uses the **Metric_Sum** command to calculate a linear regression.
  - Another example can be found on [[Visual3D:Documentation:Statistics:Meta_Command_for_Linear_Regression#Linear_Regression_with_Events_Meta-Command|Statistics Example 5#Linear Regression with Events Meta-Command]] where the meta-command uses the **Metric_Sum** command to calculate a linear regression.