DelayLine

Implements a shift-register array, or data "stream", into which a cell's values are buffered after each event.

Note: After a reset, the first value that is read fills the shift-register.

DelayLine Inputs

Syntax: DelayLine(Event,Value,Number of Steps,Reset)

Parameter

Description

Event

Specifies the event that forces an update.This parameter must be a reference to one of the following:

The Image data structure in cell A0, containing the AcquireImage function. For more information, see AcquireImage.
A cell containing an Event function. For more information, see Event.
A cell containing a Button function. For more information, see Button.

Note: DelayLine buffers the state of a referenced value before that value is updated by any other function that depends on the specified Event.

Value

A reference to the cell containing the source data (-16777216 to 16777216; default = 0).

Number of Steps

Specifies the number of values in the function's internal shift-register array. (default = 10)

Reset

Forces the function to purge itself of previously read values. The first value read after Reset will effectively "fill" the shift register.

0 = OFF (default)	The function will continue to read in values to the data stream.
1 = ON	The function will purge all values from the data stream.

DelayLine Outputs

Returns	A Delay data structure containing statistics for the specified Value over an interval from Reset to current.
Results	When the function initially inserted into a cell, a result table is created in the spreadsheet.

DelayLine Vision Data Access Functions

The following Vision Data Access functions are automatically inserted into the spreadsheet to create the result table. For more information, see Clocked Data Storage.

Last	GetValue(Delay, Index)	The last value contained in the structure.
Mean	GetMean(Delay)	The mean of all the values in the structure.
SDev	GetSDev(Delay)	The standard deviation of all the values in the structure.
Min	GetMin(Delay)	The smallest value contained in the structure.
Max	GetMax(Delay)	The largest value contained in the structure.

Additional data elements can be accessed using the following Vision Data Access functions:

Count	GetCount(Delay)	The number of values contained in the structure.
Sum	GetSum(Delay)	The sum of all values contained in the structure.