This command identifies the global maximum of a specified signal within a given time range and creates an event at that peak value. This command is useful for detecting peak joint angles, force plate data peaks, or maximum velocity in motion capture trials.

• The result will be one maximum value over the range.
• If the local maxima are needed, see the Event_Maximum command.
• To review the difference between local and global maximum values please see here

The following command shows the most recent update, Version 6.

Event_Global_Maximum
/RESULT_EVENT_NAME=
! /SIGNAL_TYPES=
! /SIGNAL_FOLDER=ORIGINAL
! /SIGNAL_NAMES=
! /SIGNAL_COMPONENTS=
! /FRAME_OFFSET=0
! /TIME_OFFSET=
! /EVENT_SEQUENCE=
! /EXCLUDE_EVENTS=
! /EVENT_SEQUENCE_INSTANCE=0
! /EVENT_SUBSEQUENCE=
! /SUBSEQUENCE_EXCLUDE_EVENTS=
! /EVENT_SUBSEQUENCE_INSTANCE=0
! /THRESHOLD=
;

Older versions of the command are listed in the notes section at the end of this page.

The following table shows the command parameters and descriptions:

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 command. The dialog box is shown below:

The following example will go through the use of the Event_Global_Maximum command in the Visual3D application.

This command may be used to create an event, Create an event RKFlex_Max at the maximum knee flexion angle during the gait cycle. The gait cycle is indicated by the RHS events. This example will go through different use cases of this command:

Example 1) The maximum value of the signal may be over the entire signal
Example 2) The maximum value of the signal may be during an event sequence
Example 3) A specific event sequence may be excluded

NOTE: If no events are specified in the Event Sequence, a global maximum over the whole trial will be created.

This example will be done showing both the dialog box and corresponding command text.

To create the RKFlex_Max event using the Event_Global_Maximum dialog box:

1. Enter information into dialog box:

• Event_Name: RKFlex_Max
• Select Frame Offset: 0
• Signal Components: X
• Event Sequence Instance: 0
• Defined Events: RHS + RHS
• Click OK

Event_Global_Maximum /RESULT_EVENT_NAME=RKFlex_Max ! /SIGNAL_TYPES= ! /SIGNAL_FOLDER=ORIGINAL ! /SIGNAL_NAMES= /SIGNAL_COMPONENTS=X ! /FRAME_OFFSET=0 ! /TIME_OFFSET= /EVENT_SEQUENCE=RHS+RHS ! /EXCLUDE_EVENTS= ! /EVENT_SEQUENCE_INSTANCE=0 ! /EVENT_SUBSEQUENCE= ! /SUBSEQUENCE_EXCLUDE_EVENTS= ! /EVENT_SUBSEQUENCE_INSTANCE=0 ! /THRESHOLD= ;

2. Select desired signal:

• Select signal from data tree Right_Knee_Angle
• Click Import Selected Signals

Two instances of RKFlex_Max were created, one in between each sequence of RHS+RHS.

In this example an event BAD was created between one sequence of RHS + RHS. Using the same parameters as the previous example, set the Exclude Sequences containing events parameter to BAD

Event_Global_Maximum /RESULT_EVENT_NAME=RKFlex_Max ! /SIGNAL_TYPES= ! /SIGNAL_FOLDER=ORIGINAL ! /SIGNAL_NAMES= /SIGNAL_COMPONENTS=X ! /FRAME_OFFSET=0 ! /TIME_OFFSET= /EVENT_SEQUENCE=RHS+RHS /EXCLUDE_EVENTS=BAD ! /EVENT_SEQUENCE_INSTANCE=0 ! /EVENT_SUBSEQUENCE= ! /SUBSEQUENCE_EXCLUDE_EVENTS= ! /EVENT_SUBSEQUENCE_INSTANCE=0 ! /THRESHOLD= ;

Only one RKFlex_Max event was created because the second sequence containing the event BAD was excluded:

Subsequences can be used to create an event that occurs within a sequence within a sequence.

In this example RKFlex_Max was created as the maximum value between LTO + LHS when these events feel between the RHS events.

Using the same parameters as the previous example, set the Subsqeuence parameter to LTO + LHS

Event_Global_Maximum /RESULT_EVENT_NAME=RKFlex_Max ! /SIGNAL_TYPES= ! /SIGNAL_FOLDER=ORIGINAL ! /SIGNAL_NAMES= /SIGNAL_COMPONENTS=X ! /FRAME_OFFSET=0 ! /TIME_OFFSET= /EVENT_SEQUENCE=RHS+RHS ! /EXCLUDE_EVENTS= ! /EVENT_SEQUENCE_INSTANCE=0 /EVENT_SUBSEQUENCE=LTO+LHS ! /SUBSEQUENCE_EXCLUDE_EVENTS= ! /EVENT_SUBSEQUENCE_INSTANCE=0 ! /THRESHOLD= ;

RKFlex_Max event was created between RHS events that contained the LTO to LHS subsequence.

Event_Global_Maximum
/Signal_Types= The type of signal to be evaluated
/Signal_Names= The names of the signals to be evaluated
/Signal_Folder= The name of the signal folder
/Event_Name= The name to be given to the threshold event
/Select_X= (True or False)Use this component of the signal
/Select_Y= (True or False)Use this component of the signal
/Select_Z= (True or False)Use this component of the signal
/Radius= The range of frames of data that must be below the maximum
/Start_At_Event= The search begins from the start event
/End_At_Event= The search ends at the end event

Dialog that pops up when pipeline selection is edited by double clicking with the left mouse button.