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visual3d:documentation:pipeline:metric_commands:metric_event_count [2024/07/03 17:29] – removed sgrangervisual3d:documentation:pipeline:metric_commands:metric_event_count [2025/09/23 19:38] (current) – [Example 2: Multiple Files] wikisysop
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 +====== Metric Event Count ======
  
 +====Overview====
 +
 +This command creates a [[visual3d:documentation:visual3d_signal_types:metric_data_type|metric]] containing the number of [[visual3d:documentation:c3d_signal_types:event_label_data_type|events]] that occur during a specified time interval or [[visual3d:documentation:pipeline:event_commands:event_define_event_sequence|event sequence]]. This can come in use when trying to identify the frequency or number of occurrences of a certain movement pattern. You must first define this event by adding an event in your pipeline before you can count it. The **Metric Event Count** command can be found in the **Pipeline Workshop** under the **Metric** folder. 
 +
 +====Pipeline Command====
 +
 +The command can be found in the workshop as so:
 +
 +<code>
 +Metric_Event_Count
 +! /RESULT_METRIC_FOLDER=PROCESSED
 +/RESULT_METRIC_NAME=
 +/EVENT_TO_COUNT=
 +! /TIME_INTERVAL=
 +! /EVENT_SEQUENCE=
 +! /EXCLUDE_EVENTS=
 +! /GENERATE_COUNT_TOTAL_IN_GLOBAL=TRUE
 +;
 +</code>
 +
 +====Command Parameters====
 +
 +The following table shows the command parameters seen above and their descriptions:
 +
 +|**RESULT_METRIC_FOLDER**|**The name of the result signal folder**|
 +|**RESULT_METRIC_NAME**|**The name of the result signal**|
 +|**EVENT_TO_COUNT**|**Specify the name of the event that is being counted**|
 +|**TIME_INTERVAL**|**The time interval over which events will be counted**|
 +|**EVENT_SEQUENCE**|**Defining a specific sequence of events to be counted**|
 +|**EXCLUDE_EVENTS**|**Defining events within the sequence to be excluded**|
 +|**GENERATE_COUNT_TOTAL_IN_GLOBAL**|**(True/False) counting the total occurrences of an event in the workspace**|
 +
 +If the user specifies an **Event_Sequence/Exclude Sequence** then the count of the specified event includes all sequences in the file.
 +
 +If **Time_Interval**, specified as a number, then a count of events within each time interval starting from time = 0 is specified as a separate frame. For example, if there were three ranges defined by the time sequence, there would be 3 frames of data in the resulting metric.
 +
 +As of Visual3D v5.00.29, the user can select both an **Event_Sequence/Exclude Sequence** and a **Time_Interval** but only the first Event_Sequence is used. If the **Time_Interval** is populated (a number or expression) the start time is the first event in the event_sequence.
 +
 +====Dialog====
 +
 +The command can be edited in a text editor or in a dialog form. To edit in the dialog pop up form either click on the **Edit** button in the pipeline workshop or double-click on the pipeline command. The dialog is shown below.
 +
 +{{:MetricEventCountDialog.png}}
 +
 +
 +The dialog box allows you to assign values to the command parameters outlined above.
 +
 +===== Example 1: Basic Metric Event Count =====
 +
 +<code>
 +Select_Active_File
 +/FILE_NAME= ALL_FILES
 +! /QUERY=
 +;
 +
 +Metric_Event_Count
 +/RESULT_METRIC_FOLDER=PROCESSED
 +/RESULT_METRIC_NAME=LON_COUNT
 +/EVENT_NAME=LON
 +/TIME_INTERVAL=
 +/EVENT_SEQUENCE=
 +/EXCLUDE_EVENTS=
 +/GENERATE_COUNT_TOTAL_IN_GLOBAL= TRUE
 +;
 +</code>
 +
 +This command will count all events in the file and a metric value LON_COUNT will be created in the METRIC::PROCESSED folder. Since GENERATE_COUNT_TOTAL_IN_GLOBAL is set to TRUE, the total number of LON events in the workspace will be created as well. To see this value set the [[visual3d:documentation:definitions:active_files|Active File]] to [[visual3d:documentation:definitions:global_workspace|GLOBAL]] and a metric value LON_COUNT will be created in the METRIC::PROCESSED folder.
 +
 +===== Example 2: Multiple Files =====
 +
 +This example shows three ways the Metric_Event_Count command can be used. All three consider a set of 5 files containing the following event LHS.
 +
 +^ File ^ LHS Event Times ^
 +| mvc004.c3d | 0.960000 |
 +| | 2.240000 |
 +| | 3.500000 |
 +| mvc003.c3d | 0.980000 |
 +| | 2.260000 |
 +| | 3.560000 |
 +| mvc002.c3d | 1.000000 |
 +| | 2.260000 |
 +| | 3.600000 |
 +| mvc005.c3d | 0.920000 |
 +| | 2.140000 |
 +| | 3.360000 |
 +
 +==== Example 2A: Count events across entire file ====
 +
 +This example counts events on a per-file basis.
 +
 +<code>
 +Metric_Event_Count
 +/RESULT_METRIC_NAME=LHS_COUNT
 +/RESULT_METRIC_FOLDER=PROCESSED
 +/EVENT_NAME=LHS
 +/TIME_INTERVAL=
 +/EVENT_SEQUENCE=
 +/EXCLUDE_EVENTS=
 +/GENERATE_COUNT_TOTAL_IN_GLOBAL=TRUE
 +;
 +</code>
 +
 +The result of this command will be:
 +
 +<code>
 +mvc005.c3d
 +Event_Count= 3
 +mvc002.c3d
 +Event_Count= 3
 +mvc003.c3d
 +Event_Count= 3
 +mvc004.c3d
 +Event_Count= 3
 +Global_Event_Count= 12
 +</code>
 +
 +==== Example 2B: Count events across entire file in time intervals ====
 +
 +This example counts events according to time intervals over entire files and also calculates global counts.
 +
 +<code>
 +Metric_Event_Count
 +/RESULT_METRIC_NAME=LHS_COUNT
 +/RESULT_METRIC_FOLDER=PROCESSED
 +/EVENT_NAME=LHS
 +/TIME_INTERVAL=1
 +/EVENT_SEQUENCE=
 +/EXCLUDE_EVENTS=
 +/GENERATE_COUNT_TOTAL_IN_GLOBAL=TRUE
 +;
 +</code>
 +
 +The result of this command will be:
 +
 +<code>
 +mvc005.c3d
 +Interval= 0.000000 to 1.000000 Event_Count= 1
 +Interval= 1.000000 to 2.000000 Event_Count= 0
 +Interval= 2.000000 to 3.000000 Event_Count= 1
 +Interval= 3.000000 to 4.000000 Event_Count= 1
 +Interval= 4.000000 to 4.200000 Event_Count= 0
 +mvc002.c3d
 +Interval= 0.000000 to 1.000000 Event_Count= 0
 +Interval= 1.000000 to 2.000000 Event_Count= 1
 +Interval= 2.000000 to 3.000000 Event_Count= 1
 +Interval= 3.000000 to 4.000000 Event_Count= 1
 +Interval= 4.000000 to 4.580000 Event_Count= 0
 +mvc003.c3d
 +Interval= 0.000000 to 1.000000 Event_Count= 1
 +Interval= 1.000000 to 2.000000 Event_Count= 0
 +Interval= 2.000000 to 3.000000 Event_Count= 1
 +Interval= 3.000000 to 4.000000 Event_Count= 1
 +Interval= 4.000000 to 4.600000 Event_Count= 0
 +mvc004.c3d
 +Interval= 0.000000 to 1.000000 Event_Count= 1
 +Interval= 1.000000 to 2.000000 Event_Count= 0
 +Interval= 2.000000 to 3.000000 Event_Count= 1
 +Interval= 3.000000 to 4.000000 Event_Count= 1
 +Interval= 4.000000 to 4.380000 Event_Count= 0
 +Global_Event_Counts
 +Global_Event_Count= 3
 +Global_Event_Count= 1
 +Global_Event_Count= 4
 +Global_Event_Count= 4
 +Global_Event_Count= 0
 +</code>
 +
 +==== Example 2C: Count events in a set number of intervals across entire file ====
 +
 +This example counts events over 5 intervals from the event_sequence START+END, where START=1.0 and END=4.0 for all files.
 +
 +<code>
 +Metric_Event_Count
 +/RESULT_METRIC_NAME=LHS_COUNT
 +/RESULT_METRIC_FOLDER=PROCESSED
 +/EVENT_NAME=LHS
 +/TIME_INTERVAL=(EVENT_LABEL::ORIGINAL::END-EVENT_LABEL::ORIGINAL::START)/5
 +/EVENT_SEQUENCE=START+END
 +/EXCLUDE_EVENTS=
 +/GENERATE_COUNT_TOTAL_IN_GLOBAL=TRUE
 +;
 +</code>
 +
 +The result for this command will be:
 +
 +<code>
 +mvc005.c3d
 +Interval= 1.000000 to 1.600000 Event_Count= 0
 +Interval= 1.600000 to 2.200000 Event_Count= 1
 +Interval= 2.200000 to 2.800000 Event_Count= 0
 +Interval= 2.800000 to 3.400000 Event_Count= 1
 +Interval= 3.400000 to 4.000000 Event_Count= 0
 +mvc002.c3d
 +Interval= 1.000000 to 1.600000 Event_Count= 1
 +Interval= 1.600000 to 2.200000 Event_Count= 0
 +Interval= 2.200000 to 2.800000 Event_Count= 1
 +Interval= 2.800000 to 3.400000 Event_Count= 0
 +Interval= 3.400000 to 4.000000 Event_Count= 1
 +mvc003.c3d
 +Interval= 1.000000 to 1.600000 Event_Count= 0
 +Interval= 1.600000 to 2.200000 Event_Count= 0
 +Interval= 2.200000 to 2.800000 Event_Count= 1
 +Interval= 2.800000 to 3.400000 Event_Count= 0
 +Interval= 3.400000 to 4.000000 Event_Count= 1
 +mvc004.c3d
 +Interval= 1.000000 to 1.600000 Event_Count= 0
 +Interval= 1.600000 to 2.200000 Event_Count= 0
 +Interval= 2.200000 to 2.800000 Event_Count= 1
 +Interval= 2.800000 to 3.400000 Event_Count= 0
 +Interval= 3.400000 to 4.000000 Event_Count= 1
 +Global_Event_Counts
 +Global_Event_Count= 1
 +Global_Event_Count= 1
 +Global_Event_Count= 3
 +Global_Event_Count= 1
 +Global_Event_Count= 3
 +</code>
 +
 +====Example 3: Defining and Counting Gait Events====
 +Here we will use **Automatic Gait Events** to define a series of events during a gait cycle trial, and then count those events using the **Metric Event Count** command.
 +
 +Once you have loaded in a gait trial to your Visual3D, use **Automatic Gait Events** to identify the core gait events like so:
 +
 +<code>
 +Automatic_Gait_Events
 +! /FRAME_WINDOW=8
 +! /USE_TPR=TRUE
 +! /TPR_EVENT_INSTANCE=1
 +;
 +</code>
 +
 +Now we can use **Metric Event Count** to count the number of left heel strikes during each trial. The command should look like so:
 +
 +<code>
 +Metric_Event_Count
 +/RESULT_METRIC_FOLDER=PROCESSED_events
 +/RESULT_METRIC_NAME=Event_Count
 +/EVENT_TO_COUNT=LHS
 +! /TIME_INTERVAL=
 +! /EVENT_SEQUENCE=
 +! /EXCLUDE_EVENTS=
 +! /GENERATE_COUNT_TOTAL_IN_GLOBAL=TRUE
 +;
 +</code>
 +
 +A new folder containing the counts named **PROCESSED_events** can now be found within the **Metric** folder.
visual3d/documentation/pipeline/metric_commands/metric_event_count.1720027740.txt.gz · Last modified: 2024/07/03 17:29 by sgranger