user3362533 user3362533 - 3 years ago 138
Javascript Question

Type mismatch for number in Google Chart API

I have an array and the second column with values like this

and inside my javascript function to create a Area Chart I made the following

function drawVisualization() {
var data = null;
data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Value');
// Create and draw the visualization.
var ac = new google.visualization.AreaChart(document
ac.draw(data, {
title : 'Results',
isStacked : true,
width : 700,
height : 400,
vAxis : {title : "kW"},
hAxis : {title : "Day"}


however I get this error
Type mismatch. Value 2050.878456 does not match type number in column index 1
however it cannot be a string type as well, why do I get this error and how to fix it?

Answer Source

Try passing the Value as string and then later do a parseFloat. Something like this:

data.addColumn('string', 'Value');

for (var i=0;i<myArrayCreated.length;i++){
    myVal = parseFloat($.trim(myArrayCreated[i][1])); 
    data.addRow([i, {v: myVal, f: myval.toFixed(6)}]); 
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