Plotly Node API

Analyze and Visualize Data, Together

Streaming Plot Examples

• mock sensor stream
• math bar fight

Installation

npm install plotly

Usage

var plotly = require('plotly')('username','apiKey');

var data = [{x:[], y:[], stream:{token:'yourStreamtoken', maxpoints:200}}];
var graphOptions = {fileopt : "extend", filename : "nodenodenode"};

plotly.plot(data,graphOptions,function() {
  var stream = plotly.stream('yourStreamtoken', function (res) {
    console.log(res);
  });
  someReadableStream.pipe(stream);
});

Full REST API Documentation can be found here: https://plot.ly/api/rest/

Sign up for plotly here: https://plot.ly/ and obtain your API key and Stream Tokens in your plotly settings: https://plot.ly/settings.

Methods

var plotly = require('plotly')(username, apiKey)

username is a string containing your username apiKey is a string containing your API key

var plotly = require('plotly')('username', 'apiKey');

plotly.plot(data,graphOptions[, callback])

Plotly graphs are described declaratively with a data JSON Object and a graphOptions JSON Object. data is an array of Objects and with each object containing data and styling information of separate graph traces. Docs: https://plot.ly/api/rest
graphOptions is an Object containing styling options like axis information and titles for your graph. Docs: https://plot.ly/api/rest
callback(err,msg) where err is an error Object, and msg is the return response Object

The msg object has the following attributes : msg.url,msg.filename,msg.message,msg.warning,msg.error

// examples/rest-example.js

var plotly = require('plotly')('username','apiKey');

var data = [{x:[0,1,2], y:[3,2,1], type: 'bar'}];
var graphOptions = {fileopt : "extend", filename : "nodenodenode"};

plotly.plot(data, graphOptions, function (err, msg) {
    console.log(msg);
});

var stream = plotly.stream(token[, callback])

token accepts a token string callback(res) where res is a the response object with the following attributes : res.msg, res.statusCode

// examples/streaming-example.js
var plotly = require('plotly')('username','apiKey');

var initData = [{x:[], y:[], stream:{token:'token', maxpoints:200}}];
var initGraphOptions = {fileopt : "extend", filename : "nodenodenode"};

plotly.plot(initData, initGraphOptions, function (err, msg) {
  if (err) return console.log(err)
  console.log(msg);

  var stream1 = plotly.stream('token', function (err, res) {
    console.log(err, res);
    clearInterval(loop); // once stream is closed, stop writing
  });

  var i = 0;
  var loop = setInterval(function () {
      var streamObject = JSON.stringify({ x : i, y : i });
      stream1.write(streamObject+'\n');
      i++;
  }, 1000);
});

Live Streaming Example

// examples/signal-stream.js

/* If you have not signed up for Plotly you can do so using https://plot.ly
 * or see the example signup.js. Once you do, populate the config.json in this
 * example folder!
 */
var config = require('./config.json')
  , username = config['user']
  , apiKey = config['apiKey']
  , token = config['token']
  , Plotly = require('../.')(username, apiKey)
  , Signal = require('random-signal')


// build a data object - see https://plot.ly/api/rest/docs for information
var data = {
    'x':[]   // empty arrays since we will be streaming our data to into these arrays
  , 'y':[]
  , 'type':'scatter'
  , 'mode':'lines+markers'
  , marker: {
      color: "rgba(31, 119, 180, 0.96)"
  }
  , line: {
      color:"rgba(31, 119, 180, 0.31)"
  }
  , stream: {
      "token": token
    , "maxpoints": 100
  }
}

// build your layout and file options
var graphOptions = {
    "filename": "streamSimpleSensor"
  , "fileopt": "overwrite"
  , "layout": {
      "title": "streaming mock sensor data"
  }
  , "world_readable": true
}

/*
 * Call plotly.plot to set the file up.
 * If you have included a streaming token
 * you should get a "All Streams Go!" message
 */

Plotly.plot(data, graphOptions, function (err, resp) {
    if (err) return console.log("ERROR", err)

    console.log(resp)

    var plotlystream = Plotly.stream(token, function () {})
    var signalstream = Signal({tdelta: 100}) //


    plotlystream.on("error", function (err) {
        signalstream.destroy()
    })

    // Okay - stream to our plot!
    signalstream.pipe(plotlystream)
})

plotly.getFigure(fileOwner, fileId[, callback])

file_owner accepts a string of the file owner's name fileId is an integer, representing the graph ID callback(figure) where figure is a the JSON object of the graph figure

var plotly = require('plotly')('username','apiKey');

plotly.getFigure('fileOwner', 'fileId', function (err, figure) {
    if (err) console.log(err);
    console.log(figure);
});

plotly.getImage(figure[, options, callback])

figure is a JSON object of the graph figure options.format | jpeg, png, pdf, eps, webp options.width | width in px (default : 700) options.height | height in px (default : 500)

callback(err, imageData)

err is an Error Object imageStream is a Stream of base-64 encoded imageData

var plotly = require('plotly')('username','apiKey');
var fs = require('fs');

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  type: "scatter"
};

var figure = { 'data': [trace1] };

var imgOpts = {
    format: 'png',
    width: 1000,
    height: 500
};

plotly.getImage(figure, imgOpts, function (error, imageStream) {
    if (error) return console.log (error);

    var fileStream = fs.createWriteStream('1.png');
    imageStream.pipe(fileStream);
});

You can also use getFigure() and getImage() together!

var plotly = require('../.')('username','apiKey');

// grab the figure from an existing plot
plotly.getFigure('fileOwner', 'fileId', function (err, figure) {
	if (err) return console.log(err);

	var imgOpts = {
		format: 'png',
		width: 1000,
		height: 500
	};

    plotly.getImage(figure, imgOpts, function (error, imageStream) {
        if (error) return console.log (error);

        var fileStream = fs.createWriteStream('2.png');
        imageStream.pipe(fileStream);
    });
});

plotly.deletePlot(fid[, callback])

fid is a String, the id of the plot you wish you delete callback is a function with err and plot as parameters. err, if present, is the error message returned from the request. plot is the plot that was deleted.

var plotly = require('../.')('username','apiKey');

plotly.deletePlot('88', function (err, plot) {
    if (err) console.log(err)
    else console.log(plot);
});