Basic functions

aylien_textapi_sample_basic.js

//**********************************************************
// Here's a basic app that uses AYLIEN's Text Analysis API
// through the Node.js SDK. To install the SDK using `npm`:
// $ npm install aylien_textapi
//**********************************************************
var AYLIENTextAPI = require('aylien_textapi');
var textapi = new AYLIENTextAPI({
    application_id: 'YourApplicationId',
    application_key: 'YourApplicationKey'
});

//**********************************************************
// Language Detection
// Detects the language of a text
//**********************************************************

textapi.language('What language is this sentence written in?', function(err, resp) {
    console.log("\n************************************");
    console.log("Language Detection Results:");
    console.log("************************************\n");
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        console.log("Language :", resp.lang);
        console.log("Confidence :", resp.confidence);
    }
});


//**********************************************************
// Sentiment Analysis
// Finds out if a text is positive, negative or neutral
//**********************************************************

textapi.sentiment('John is a very good football player!', function(err, resp) {
    console.log("\n************************************");
    console.log("Sentiment Analysis Results:");
    console.log("************************************\n");
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        console.log("Subjectivity :", resp.subjectivity);
        console.log("Subjectivity Confidence  :", resp.subjectivity_confidence);
        console.log("Polarity :", resp.polarity);
        console.log("Polarity Confidence  :", resp.polarity_confidence);
    }
});


//**********************************************************
// Article Summarization
// Summarizes an article into a few key sentences
//**********************************************************

textapi.summarize('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Article Summarization Results:");
    console.log("************************************\n");    
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        for (var i = 0; i < resp.sentences.length; i++) {
            console.log("Sentence ", i + 1, ": ", resp.sentences[i]);
        }
    }
});

//**********************************************************
// Article Classification
// Classifies an article into about 500 categories
//**********************************************************

textapi.classify('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Article Classification Results:");
    console.log("************************************\n");    
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        for (var i = 0; i < resp.categories.length; i++) {
            console.log("Label  :", resp.categories[i].label);
            console.log("Code :", resp.categories[i].code);
            console.log("Confidence :", resp.categories[i].confidence);
        }

    }
});

//**********************************************************
// Entity Extraction
// Extracts the entities mentioned in a text
//**********************************************************

textapi.entities('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Entity Extraction Results:");
    console.log("************************************\n");     
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        console.log("Organisations  :", resp.entities.organization);
        console.log("Locations  :", resp.entities.location);
        console.log("Keywords :", resp.entities.keyword);
        console.log("Dates  :", resp.entities.date);
        console.log("People :", resp.entities.person);
    }
});

//**********************************************************
// Concept Extraction
// Extracts the concepts mentioned in a text
//**********************************************************

textapi.concepts('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Concept Extraction Results:");
    console.log("************************************\n");    
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        var concepts = Object.keys(resp.concepts);
        concepts.forEach(function(c) {
            var info = resp.concepts[c];
            console.log("\nConcept DBPedia URI  :" + c);
            console.log("Surface Form :" + info.surfaceForms[0].string);
            console.log("Relavance Score  :" + info.surfaceForms[0].score);
            console.log("Offset Index :" + info.surfaceForms[0].offset);
        });


    }
});

//**********************************************************
// Hashtag Suggestion
// Suggests a set of hashtags for a piece of text
//**********************************************************

textapi.hashtags('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Hashtag Suggestion Results:");
    console.log("************************************\n");    
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        for (var i = 0; i < resp.hashtags.length; i++) {
            console.log("Hashtag ", i, ": ", resp.hashtags[i]);
        }
    }
});

//**********************************************************
// Article Extraction
// Scrapes an article and extracts main text, images, etc
//**********************************************************

textapi.extract('http://www.bbc.com/news/science-environment-30097648', function(err, resp) {
    console.log("\n************************************");
    console.log("Article Extraction Results:");
    console.log("************************************\n");    
    if (err !== null) {
        console.log("Error: " + err);
    } else {
        console.log("Article Title  :", resp.title);
        console.log("Article text :", resp.article);
    }
});

//************************************************************
// Unsupervised Classification
// Classify a piece of text based on a specified set of labels
//************************************************************

var params = {
    text: "Organic molecules detected on comet",
    'class': ['Cosmology', 'Chemistry', 'Agriculture']
};

textapi.unsupervisedClassify(params, function(error, response) {
    console.log("\n************************************");
    console.log("Unsupervised Classification Results:");
    console.log("************************************\n");     
    if (error !== null) {
        console.log(error, response);
    } else {
        console.log("\nThe text to classify is : \n\n", response.text, "\n");
        for (var i = 0; i < response.classes.length; i++) {
            console.log("label - ", response.classes[i].label, ", score -", response.classes[i].score, "\n");
        }
    }
});