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Add smoothing node to Node-RED-nodes
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89
analysis/smooth/17-smooth.html
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analysis/smooth/17-smooth.html
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<!--
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Copyright 2014 IBM Corp.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<script type="text/x-red" data-template-name="smooth">
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<div class="form-row">
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<select id="node-input-action" style="width:80%; margin-right:5px;">
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<option value="max">Return the maximum value seen</option>
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<option value="min">Return the minimum value seen</option>
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<option value="mean">Return the mean value seen</option>
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<option value="low">Perform low pass filter</option>
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<option value="high">Perform high pass filter</option>
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</select>
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</div>
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<div class="form-row">
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<span id="node-over">over the most recent </span>
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<input type="text" id="node-input-count" placeholder="10" style="width:80px;"/>
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<span id="node-over2"> values.</span>
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</div>
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<div class="form-row">
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<label for="node-input-round" style="width:200px;">Round to nearest integer ?</label>
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<input type="checkbox" id="node-input-round" style="display: inline-block; width: auto; vertical-align: top;">
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</div>
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<br/>
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<div class="form-row">
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<label for="node-input-name"><i class="icon-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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<div class="form-tips" id="node-tip">Tip: This node ONLY works with numbers.</div>
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</script>
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<script type="text/x-red" 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>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><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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<script type="text/javascript">
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RED.nodes.registerType('smooth', {
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color: "#E2D96E",
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category: 'function',
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defaults: {
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count: {value:"10",required:true,validate:RED.validators.number()},
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action: {value:"mean"},
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round: {value:false},
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name: {value:""}
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},
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inputs: 1,
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outputs: 1,
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icon: "smooth.png",
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label: function() {
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return this.name || "smooth";
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},
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labelStyle: function() {
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return this.name ? "node_label_italic" : "";
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},
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oneditprepare: function() {
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$("#node-input-count").spinner({
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min:1,
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width:80
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});
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$("#node-input-action").change( function() {
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var a = $("#node-input-action").val();
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if ((a === "high") || ( a === "low" )) {
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$("#node-over").html("with a smoothing factor of ");
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$("#node-over2").html("");
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}
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else {
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$("#node-over").html("over the most recent ");
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$("#node-over2").html(" values.");
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}
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});
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$("#node-input-action").change();
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}
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});
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</script>
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59
analysis/smooth/17-smooth.js
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analysis/smooth/17-smooth.js
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/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var RED = require(process.env.NODE_RED_HOME + "/red/red");
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function SmoothNode(n) {
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RED.nodes.createNode(this, n);
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this.action = n.action;
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this.round = n.round || false;
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this.count = Number(n.count);
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var node = this;
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var a = [];
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var tot = 0;
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var pop = 0;
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var old = null;
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this.on('input', function (msg) {
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var n = Number(msg.payload);
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if (!isNaN(n)) {
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if ((node.action === "low") || (node.action === "high")) {
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if (old == null) { old = n; }
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old = old + (n - old) / node.count;
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if (node.action === "low") { msg.payload = old; }
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else { msg.payload = n - old; }
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}
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else {
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a.push(n);
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if (a.length > node.count) { pop = a.shift(); }
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if (node.action === "max") {
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msg.payload = Math.max.apply(Math, a);
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}
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if (node.action === "min") {
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msg.payload = Math.min.apply(Math, a);
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}
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if (node.action === "mean") {
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tot = tot + n - pop;
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msg.payload = tot / a.length;
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}
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}
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if (node.round) { msg.payload = Math.round(msg.payload); }
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node.send(msg);
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}
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else { node.log("Not a number: "+msg.payload); }
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});
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}
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RED.nodes.registerType("smooth", SmoothNode);
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177
analysis/smooth/LICENSE
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analysis/smooth/LICENSE
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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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1. Definitions.
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24
analysis/smooth/README.md
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analysis/smooth/README.md
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node-red-node-smooth
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====================
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A <a href="http://nodered.org" target="_new">Node-RED</a> node that provides several simple smoothing algorithms for incoming data values.
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Install
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-------
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Run the following command in the root directory of your Node-RED install
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npm install node-red-node-smooth
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Usage
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-----
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A simple node to provide various functions across several previous values, including max, min, mean, high and low pass filters.
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Max, Min and Mean work over a specified number of previous values.
|
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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 analogous to an RC time constant - but there is no time component to this as the code is based on events arriving.
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**Note:** This only operates on **numbers**. Anything else will try to be made into a number and rejected if that fails.
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BIN
analysis/smooth/icons/smooth.png
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BIN
analysis/smooth/icons/smooth.png
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Binary file not shown.
After Width: | Height: | Size: 725 B |
23
analysis/smooth/package.json
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analysis/smooth/package.json
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{
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"name" : "node-red-node-smooth",
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"version" : "0.0.1",
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"description" : "A Node-RED node that provides several simple smoothing algorithms for incoming data values.",
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"dependencies" : {
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},
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"repository" : {
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"type":"git",
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"url":"https://github.com/node-red/node-red-nodes/tree/master/analysis/smooth"
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},
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"license": "Apache",
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"keywords": [ "node-red", "smooth", "average" ],
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"node-red" : {
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"nodes" : {
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"smooth": "17-smooth.js"
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}
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},
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"author": {
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"name": "Dave Conway-Jones",
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"email": "ceejay@vnet.ibm.com",
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"url": "http://nodered.org"
|
||||
}
|
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}
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