Google charts multiline dynamic charts - charts

Question

Am new to PHP coding & have a few google charts working. All of these charts I've generated so far are based on (date,number of event occurrences) type of chart. I'm trying to plot a google chart whose data is the output of SQL query.
The output of SQL query looks as below
|SERIES|DATE_1|DATE_2|DATE_3|
|a|2|3|
|b|4|6|
|c|7|8|
Both SERIES & DATE_1 can vary. That is to say, based on various conditions in the SQL query, the number of DATE_ can be vary & so can the SERIES.
I would then have to pass this output to the google chart plot code.
Here is what i've tried coding so far
$link = mysql_connect("localhost", "user", "pass");
$dbcheck = mysql_select_db("database");
if ($dbcheck) {
$chart_array_1[] = "['MY_DATE','MY_NAME','#NUM_OCCURENCES']";
$result = mysql_query($sql);
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_assoc($result)) {
$my_date=$row["MY_DATE"];
$my_ins=$row["MY_NAME"];
$my_count=$row["MY_COUNT"];
$chart_array_1[]="['".$my_date."','".$my_ins."',".$my_count."]";
}
}
}
mysqli_close($link);
<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart() {
// Create our data table out of JSON data loaded from server.
var data_1 = google.visualization.arrayToDataTable([<?php echo (implode(",", $chart_array_1)); ?>])
var options = {
bar: {groupWidth: "6%"},
trendlines: {
1: {
type: 'linear',
color: 'green',
lineWidth: 3,
opacity: 0.3,
showR2: true,
visibleInLegend: true
}
},
chartArea: {
left: 70,
top: 61,
width:'95%',
height:'70%'
},
curveType: 'function',
//width: 1600,
height: 400,
pointSize: 4,
lineWidth: 2,
visibleInLegend: false,
vAxis: {
//title: "GC#",
logScale: true,
titleTextStyle: {
color: 'black'
}
},
hAxis: {
title: "TIMELINE",
titleTextStyle: {
bold: false,
color: 'black'
}
},
legend: {
position: 'top',
alignment: 'center',
textStyle: {
color: 'blue'
}
}
};
var chart_1 = new google.visualization.LineChart(document.getElementById('plot1'));
chart_1.draw(data_1, options);
}
</script>
I'm unable to plot the graph. I get the error "Data column(s) for axis #0 cannot be of type string×". Could someone please help me here.
I'd like to see a,b,c etc as separate series each while the date goes on to the X-Axis. Please note am after generating data dynamically using SQL query & not a static array which most examples demonstrate. Could someone please help?

Answer 1

Managed to implement thing a different way. Hence this question can be ignored.