Add rows to google chart from array?

Question

I'm having trouble adding rows to a google chart from an array. Right now I have the code below and it works fine. I want to use a for loop to add the rows instead of having to manually add in each one like I have it now when I was testing it out. How can I do that? The array has 30 elements in total.

function drawChart(array1) {

// Create the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Day');
data.addColumn('number', 'Temperature');

data.addRows([

    [array1[29], array1[28]],
    [array1[27], array1[26]],
    [array1[25], array1[24]],
    [array1[23], array1[22]],
    [array1[21], array1[20]],

    ["Today", array1[0]]

]);


var options = {'title':'Historical Temperatures',

    hAxis: {
    title: 'Time',
    logScale: true
},
    vAxis: {
        title: 'Popularity',
        logScale: false
    },
    'width':700,
    'height':300};


var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}

Would replacing the data.addRows block with the following work?

for (var i = 20; i < array1.length; i+2)
{
    data.addRows([
        [array1[i+1], array1[i]]
    ])
}

I tried it but the script / page crashes out and I need to force quit the browser. — Csw
– Csw, Commented May 4, 2016 at 17:27

Fabricator · Accepted Answer · 2016-05-04 17:29:48Z

1

There is a typo in your for loop:

for (var i = 20; i < array1.length; i+2) // it doesn't update i and enters an infinite loop

should be

for (var i = 20; i < array1.length; i+=2)

answered May 4, 2016 at 17:29

Fabricator

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1 Comment

Csw Over a year ago

Yep that was causing the issue. Thanks for finding that.

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