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node-red-nodes/function/smooth/17-smooth.html

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<script type="text/x-red" data-template-name="smooth">
<div class="form-row">
<label for="node-input-property"><i class="fa fa-ellipsis-h"></i> <span data-i18n="node-red:common.label.property"></span></label>
<input type="text" id="node-input-property" style="width:70%;"/>
</div>
<div class="form-row">
<label for="node-input-action"><i class="fa fa-bolt"></i> Action</label>
<select id="node-input-action" style="width:60%; margin-right:5px;">
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<option value="max">Return the maximum value seen</option>
<option value="min">Return the minimum value seen</option>
<option value="mean">Return the mean value</option>
<option value="sd">Return the standard deviation</option>
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<option value="low">Perform low pass filter</option>
<option value="high">Perform high pass filter</option>
</select>
</div>
<div class="form-row">
<label for="node-input-count">&nbsp;</label>
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<span id="node-over">over the most recent </span>
<input type="text" id="node-input-count" placeholder="10" style="width:50px;"/>
<span id="node-over2"> values</span>
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</div>
<div class="form-row">
<label for="node-input-round">(optionally)</label>
round to <input type="text" id="node-input-round" placeholder="ignore" style="width:50px;"/> decimal places
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</div>
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<div class="form-row">
<label for="node-input-mult">Treat</label>
<select id="node-input-mult" style="width:60%; margin-right:5px;">
<option value="single">All msg as one stream.</option>
<option value="multi">Different msg.topic as individual streams.</option>
</select>
</div>
<div class="form-row" id="row-input-reduce">
<label for="node-input-reduce"><i class="fa fa-compress"></i> Reduce</label>
<input type="checkbox" id="node-input-reduce" style="display:inline-block; width:20px; vertical-align:baseline;">
only emit one message per most recent N values
</div>
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<br/>
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
</div>
<div class="form-tips" id="node-tip">Tip: This node ONLY works with numbers.</div>
</script>
<script type="text/x-red" data-help-name="smooth">
<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>
<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 &alpha; 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>
<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>
<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>
</script>
<script type="text/javascript">
RED.nodes.registerType('smooth', {
color: "#E2D96E",
category: 'function',
defaults: {
name: {value:""},
property: {value:"payload",required:true},
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action: {value:"mean"},
count: {value:"10",required:true,validate:RED.validators.number()},
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round: {value:""},
mult: {value:"single"},
reduce: {value:false}
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},
inputs: 1,
outputs: 1,
icon: "smooth.png",
label: function() {
return this.name || "smooth";
},
labelStyle: function() {
return this.name ? "node_label_italic" : "";
},
outputLabels: function() { return this.reduce === true ? (this.action+" of "+this.count) : (this.action); },
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oneditprepare: function() {
if (this.property === undefined) {
$("#node-input-property").val("payload");
}
$("#node-input-property").typedInput({default:'msg',types:['msg']});
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$("#node-input-count").spinner({
min:1
});
$("#node-input-round").spinner({
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});
$("#node-input-action").change( function() {
var a = $("#node-input-action").val();
if ((a === "high") || ( a === "low" )) {
$("#node-over").html("with a smoothing factor of ");
$("#node-over2").html("");
$("#row-input-reduce").hide();
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}
else {
$("#node-over").html("over the most recent ");
$("#node-over2").html(" values");
$("#row-input-reduce").show();
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}
});
$("#node-input-action").change();
if ($("#node-input-round").val() === "true") {
$("#node-input-round").val(0);
}
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}
});
</script>