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node-red/packages/node_modules/@node-red/nodes/locales/en-US/function/16-range.html

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<script type="text/x-red" data-help-name="range">
<p>Maps a numeric value to a different range.</p>
<h3>Inputs</h3>
<dl class="message-properties">
<dt>payload <span class="property-type">number</span></dt>
<dd>The payload <i>must</i> be a number. Anything else will try to be
parsed into a number and rejected if that fails.</dd>
</dl>
<h3>Outputs</h3>
<dl class="message-properties">
<dt>payload <span class="property-type">number</span></dt>
<dd>The value mapped to the new range.</dd>
</dl>
<h3>Details</h3>
<p>This node will linearly scale the received value. By default, the result
is not constrained to the range defined in the node.</p>
<p><i>Scale and limit to target range</i> means that the result will never be outside
the range specified within the result range.</p>
<p><i>Scale and wrap within the target range</i> means that the result will
be wrapped within the result range.</p>
</script>