How many businesses in state X have more than Y stars?

Three example of specific questions in this class are:

How many businesses in Wisconsin have more than 3 stars? 67
How many businesses in North Carolina have more than 4 stars? 56
How many businesses in Illinois have more than 2 stars? 20

State

Stars

City

Data is not loaded yet

items = 'not loaded yet'

$.get('http://bigdatahci2015.github.io/data/yelp/yelp_academic_dataset_business.5000.json.lines.txt')
    .success(function(data){        
        var lines = data.trim().split('\n')

        // convert text lines to json arrays and save them in `items`
        items = _.map(lines, JSON.parse)

        console.log('number of items loaded:', items.length)

        console.log('first item', items[0])
     })
     .error(function(e){
         console.error(e)
     })

function viz(arg1, arg2, arg3){    

    // define a template string
    var tplString = '<g transform="translate(0 ${d.y})"> \
                    <text y="20">${d.label}</text> \
                    <rect x="30"   \
                         width="${d.width}" \
                         height="20"    \
                         style="fill:${d.color};    \
                                stroke-width:3; \
                                stroke:rgb(0,0,0)" />   \
                    <text y="20">${d.label}</text> \
                    </g>'

    // compile the string to get a template function
    var template = _.template(tplString)
    var filter_stars = _.filter(items, function(d){
            return (d.stars >= arg2)
        })
    console.log('filter stars: ', filter_stars)

    var filtered_states = _.filter(filter_stars, function(d){
            return (d.state == arg1)
        })
    console.log('filter states: ', filtered_states)

    var cities = _.groupBy(filtered_states, function(d){
            return d.city
        })
    console.log("cities: ", cities)

    function computeX(d, i) {
        return 0
    }

    function computeWidth(d, i) {        
        return d[0].length 
    }

    function computeY(d, i) {
        return i * 20
    }

    function computeColor(d, i) {
        return 'red'
    }

    function computeLabel(d, i) {
        return d[0].length
    }

    // TODO: modify the logic here based on your UI
    // take the first 100 items to visualize    
    items = _.take(items, 100)

    var pairs = _.pairs(cities)
    var viz = _.map(pairs, function(d, i){                
                return {
                    x: computeX(d, i),
                    y: computeY(d, i),
                    width: computeWidth(d, i),
                    color: computeColor(d, i),
                    label: computeLabel(d, i)
                }
             })
    console.log('viz', viz)

    var result = _.map(viz, function(d){
             // invoke the compiled template function on each viz data
             return template({d: d})
         })
    console.log('result', result)

    $('.myviz').html('<svg width="100%" height="100%">' + result + '</svg>')
}

$('button#viz').click(function(){    
    var arg1 = $('input#arg1').val()
    var arg2 = $('input#arg2').val()
    var arg3 = $('input#arg3').val()
    viz(arg1, arg2, arg3)
})

Authors

This UI is developed by