Dynamic data for line graph in codeigniter

Question

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I have been trying to prepare a graph using the values that I have but somehow all I could do is just getting data to JSON.

What I have tried:

print_r(json_encode($graph, JSON_NUMERIC_CHECK)); // This is in my controller

Below code is in my view page.

JavaScript

$(document).ready(function (res) {
    var chart = new CanvasJS.Chart("chartContainer", {
        title:{
            text: "Financial Year Wise Data"              
        },
        data: [ {
            type: "line",
            dataPoints: res
        } ]
    });

HTML

<div id="chartContainer" style="height: 300px; width: 100%"></div>

Posted 16-Feb-17 23:52pm

Member 13007173

Updated 17-Feb-17 5:10am

Bryian Tan

v2

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Richard Deeming · Answer 1 · 2017-02-17T05:10:00

Solution 1

The function you pass to $(document).ready(...) will receive a single parameter, which is a reference to the jQuery object:

.ready() | jQuery API Documentation[^]

When $.noConflict() is used to avoid namespace conflicts, the $ shortcut is no longer available. However, the .ready() handler is passed a reference to the jQuery object that called the method. This allows the handler to use a jQuery object, for example as $, without knowing its aliased name.

This object is clearly not a valid set of data points for your chart.

You will either need to load the chart data using an AJAX request, or echo the data into a Javascript variable and use that to initialize your chart.

Posted 17-Feb-17 5:10am

Richard Deeming

Comments

Member 13007173 17-Feb-17 12:01pm

I just changed the above code to this.

$("#displayChart").click(function(res) {
e.preventDefault();
$.ajax({
type: "JSON",
url: "http://localhost:8080/supply_chain/historical_analysis",
success: function(res) {
console.log(res);
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "Financial Year Wise Data"
},
data: [{
type: "line",
dataPoints: res
}]

});
},
error: function(err) {
console.log(err);
}
});
});

Nelek 17-Feb-17 15:52pm

Then you should use the "improve question" and change or add the code above... it will improve readability with proper format and indentation