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

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<!--
Copyright 2014 IBM Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script type="text/x-red" data-template-name="smooth">
<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:80px;"/>
<span id="node-over2"> values.</span>
</div>
<div class="form-row">
<label for="node-input-round">&nbsp;</label>
<input type="checkbox" id="node-input-round" style="display: inline-block; width: auto; vertical-align: top;"> Round to the nearest integer ?
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</div>
<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>
<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><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: {
count: {value:"10",required:true,validate:RED.validators.number()},
action: {value:"mean"},
round: {value:false},
name: {value:""}
},
inputs: 1,
outputs: 1,
icon: "smooth.png",
label: function() {
return this.name || "smooth";
},
labelStyle: function() {
return this.name ? "node_label_italic" : "";
},
oneditprepare: function() {
$("#node-input-count").spinner({
min:1,
width:80
});
$("#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("");
}
else {
$("#node-over").html("over the most recent ");
$("#node-over2").html(" values.");
}
});
$("#node-input-action").change();
}
});
</script>