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11 lines
1.2 KiB
HTML
11 lines
1.2 KiB
HTML
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<script type="text/html" data-help-name="smooth">
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<p>A simple node to provide various functions across several previous values, including max, min, mean, high and low pass filters.</p>
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<p>Messages arriving with different <code>msg.topic</code> can be treated as separate streams if so configured.</p>
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<p>Max, Min and Mean work over a specified number of previous values.</p>
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<p>The High and Low pass filters use a smoothing factor. The higher the number the more the smoothing. E.g. a value of 10 is similar to an α of 0.1. It is analagous to an RC time constant - but there is no time component to this as the time is based on events arriving.</p>
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<p>Enabling the Reduce option causes the node to only emit one message per N values (available for the Max, Min and Mean functions). E.g. if set to Mean over 10 values, there will only be one outgoing message per 10 incoming ones.</p>
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<p>If <code>msg.reset</code> is received (with any value), all the counters and intermediate values are reset to an initial state.</p>
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<p><b>Note:</b> This only operates on <b>numbers</b>. Anything else will try to be made into a number and rejected if that fails.</p>
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</script>
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