TravelWriter (Analytic Filter)

The TravelWriter filter is used to write values when items are in a certain point in your process or physical location.

It's primarily used to create heatmaps when one axis of your heatmap is an element that moves or changes state over time.

The filter changes your data significantly, from a pair of values to an array.

Note that the function parameter only applies when the channel remains steady.

Name	Default	Meaning
Channel	<blank>	The column to use as the moving/state-changing axis
Min	0	The minimum element in the array
Max	100	The maximum element in the array
Function	max	The function (min or max) that determines which value is stored in each array element

<filter type="TravelWriter">
     <channel>Position</channel>
     <min>0</min>
     <max>200</max>
     <function>min</function>
</filter>

Records the a value as Position changes over a range of 0-200

Input

Output

Index	1	2	3	4	5	6	…
07:00:20	nan	nan	nan	12	12	8	…