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Pass multi-dimension array into Google.visualization.arrayToDataTable

arrays google-visualization html javascript multidimensional-array

Json Prime

asked 05 Jun, 2022

I want to draw a candlestick chart by using Google Chart , i have a multi-array array call chartdata and i failed to pass the multi-array array into google.visualization.arrayToDataTable([chartdata],true) and give errorLast domain does not have enough data columns (missing 3)

it should look like this var data = google.visualization.arrayToDataTable([ ['2022-05-25 12:00',12,864,889,76], ['2022-05-25 13:00',765,45,97,82] ],true);

html

<div >
        <div>
            <button>OK</button>
            <table id="haha">
                <thead>
                    <tr>
                        <td>date</td>
                        <td>open</td>
                        <td>close</td>
                        <td>high</td>
                        <td>low</td>
                        <td>change</td>
                    </tr>
                </thead>
                <tr class="data">
                    <td class="date_">2022-05-25 12:00</td>
                    <td class="open">12</td>
                    <td class="close">864</td>
                    <td class="high">889</td>
                    <td class="low">76</td>
                    <td class="change">66</td>
                </tr>
                <tr class="data">
                    <td class="date_">2022-05-25 13:00</td>
                    <td class="open">765</td>
                    <td class="close">45</td>
                    <td class="high">97</td>
                    <td class="low">82</td>
                    <td class="change">613</td>
                </tr>
            </table>
        </div>
    </div>
    <div id="chart" style="width: 900px; height: 500px;"></div>

js

$(document).ready(function(){
        $(document).on("click", "button", function(){

            var parenthis = this.parentElement;
            var tr = parenthis.querySelectorAll('.data');

            var chartdata = [];

            for(var x=0 ; x < tr.length ; x++){

                var subdata = [];
                var array=['date_','open','close','high','low'];

                for(var y=0 ; y < array.length ; y++){
                    
            
                    var class_table = parenthis.querySelectorAll("[class=" + CSS.escape(array[y]) + "]"); 

                    if(y==0){
                        subdata.push(class_table[x].innerHTML);
                    }
                    else if(y==4){
                        subdata.push(parseFloat(class_table[x].innerHTML));
                        chartdata.push(subdata);
                    }
                    else{
                        subdata.push(parseFloat(class_table[x].innerHTML))
                    }

                };                    
            };

            // candlestick chart 
            google.charts.load('current', {'packages':['corechart']});
            google.charts.setOnLoadCallback(drawChart);

            function drawChart(){

                // [[str,num/float,num/float,num/float,num/float],]
                var data = google.visualization.arrayToDataTable([chartdata],true);
                
                var options = {
                legend:'none',
                };

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

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Answer

In your script, how about the following modification?

From:

var data = google.visualization.arrayToDataTable([chartdata],true);

To:

var data = google.visualization.arrayToDataTable(chartdata,true);

In your script, chartdata is the 2-dimensional array. So, I thought that this might be able to be directly used.

Reference:

arrayToDataTable()

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