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Google Chart is showing no trendline, doesn't show an error

I try to add a trendline to my Google LineChart. It just doesn't show up, without any hints why not in my browsers console.
Just copied the option setting from Googles examples. The table data are getting loaded via ajax, I disabled it and added a static string instead for the example.
I thought that I may have do define a series, but I can't really understand what a series is, and how do define one; my inital thought was that it's getting recognised automatically.
My code:
/* global google */
google.charts.load('current', {'packages': ['gauge', 'corechart', 'line']});
google.charts.setOnLoadCallback(drawAll);
function drawAll() {
drawTrendlines();
}
var temp_line;
function drawTrendlines() {
var line_data = jsonString;
function ajaxLines() {
console.log("updated lines");
temp_line.setDataTable(jsonString);
temp_line.draw();
setTimeout(ajaxLines, 60 * 1000);
}
var data = new google.visualization.DataTable(line_data);
var options = {
lineWidth: 3,
trendlines: { 0: {} },
height: 400,
hAxis: {
title: 'Zeit',
titleTextStyle: {
color: '#cccccc'
},
baselineColor: '#cccccc'
},
vAxis: {
title: 'Temperatur',
minValue: 20,
maxValue: 29,
titleTextStyle: {
color: '#cccccc'
},
baselineColor: '#cccccc'
},
colors: ['#AB0D06', '#007329'],
curveType: 'function',
backgroundColor: '#000'
};
temp_line = new google.visualization.ChartWrapper({
chartType: 'LineChart',
dataDataTable: data,
options: options,
containerId: 'temp_line'
});
temp_line.draw();
ajaxLines();
}
//Those data will be loaded via ajax when running on server
var jsonString = '{"cols":[{"label":"Mins","type":"string"},{"label":"Temp","type":"number"}],"rows":[{"c":[{"v":"02.02, 18:18"},{"v":"27.3","f":"27.3\u00b0"}]},{"c":[{"v":"02.02, 18:22"},{"v":"27.3","f":"27.3\u00b0"}]},{"c":[{"v":"02.02, 18:26"},{"v":"27.4","f":"27.4\u00b0"}]},{"c":[{"v":"02.02, 18:30"},{"v":"27.0","f":"27.0\u00b0"}]},{"c":[{"v":"02.02, 18:34"},{"v":"26.9","f":"26.9\u00b0"}]},{"c":[{"v":"02.02, 18:38"},{"v":"26.9","f":"26.9\u00b0"}]},{"c":[{"v":"02.02, 23:34"},{"v":"24.2","f":"24.2\u00b0"}]},{"c":[{"v":"02.02, 23:38"},{"v":"24.4","f":"24.4\u00b0"}]},{"c":[{"v":"02.02, 23:42"},{"v":"24.7","f":"24.7\u00b0"}]},{"c":[{"v":"02.02, 23:46"},{"v":"24.8","f":"24.8\u00b0"}]},{"c":[{"v":"02.02, 23:50"},{"v":"24.9","f":"24.9\u00b0"}]},{"c":[{"v":"02.02, 23:54"},{"v":"25.0","f":"25.0\u00b0"}]},{"c":[{"v":"02.02, 23:58"},{"v":"25.1","f":"25.1\u00b0"}]},{"c":[{"v":"03.02, 0:02"},{"v":"25.2","f":"25.2\u00b0"}]},{"c":[{"v":"03.02, 0:06"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:10"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:14"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:18"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:22"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:26"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:30"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:34"},{"v":"25.3","f":"25.3\u00b0"}]},{"c":[{"v":"03.02, 0:38"},{"v":"25.4","f":"25.4\u00b0"}]},{"c":[{"v":"03.02, 0:42"},{"v":"25.4","f":"25.4\u00b0"}]},{"c":[{"v":"03.02, 0:46"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 0:50"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 0:54"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 0:58"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:02"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:06"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:10"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:14"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:18"},{"v":"25.4","f":"25.4\u00b0"}]},{"c":[{"v":"03.02, 1:22"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:26"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:30"},{"v":"25.5","f":"25.5\u00b0"}]},{"c":[{"v":"03.02, 1:34"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 1:38"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 1:42"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 1:46"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 1:50"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 1:54"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 1:58"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 2:02"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 2:06"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:10"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:14"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 2:18"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:22"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:26"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:30"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:34"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:38"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:42"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:46"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:50"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:54"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 2:58"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:02"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:06"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:10"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:14"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:18"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:22"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:26"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:30"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:34"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:38"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:42"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:46"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:50"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:54"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 3:58"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:02"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:06"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:10"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:14"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:18"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 4:22"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:26"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:30"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:34"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:38"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 4:42"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:46"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 4:50"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 4:54"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 4:58"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:02"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 5:06"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:10"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:14"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:18"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:22"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:26"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:30"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:34"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:38"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 5:42"},{"v":"25.6","f":"25.6\u00b0"}]},{"c":[{"v":"03.02, 5:46"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:50"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:54"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 5:58"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:02"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:06"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:10"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:14"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:18"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:22"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:26"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:30"},{"v":"25.8","f":"25.8\u00b0"}]},{"c":[{"v":"03.02, 6:34"},{"v":"25.8","f":"25.8\u00b0"}]},{"c":[{"v":"03.02, 6:38"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:42"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:46"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 6:50"},{"v":"25.7","f":"25.7\u00b0"}]},{"c":[{"v":"03.02, 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9:10"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:14"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:18"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:22"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:26"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 9:30"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:34"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:38"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:42"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:46"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:50"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 9:54"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 9:58"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 10:02"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:06"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:10"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:14"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:18"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:22"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:26"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:30"},{"v":"26.1","f":"26.1\u00b0"}]},{"c":[{"v":"03.02, 10:34"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:38"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 10:42"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 10:46"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 10:50"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 10:54"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 10:58"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:02"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:06"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:10"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:14"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:18"},{"v":"25.9","f":"25.9\u00b0"}]},{"c":[{"v":"03.02, 11:22"},{"v":"26.0","f":"26.0\u00b0"}]},{"c":[{"v":"03.02, 11:26"},{"v":"26.1","f":"26.1\u00b0"}]},{"c":[{"v":"03.02, 11:30"},{"v":"26.2","f":"26.2\u00b0"}]},{"c":[{"v":"03.02, 11:34"},{"v":"26.3","f":"26.3\u00b0"}]},{"c":[{"v":"03.02, 11:38"},{"v":"26.3","f":"26.3\u00b0"}]},{"c":[{"v":"03.02, 11:42"},{"v":"26.3","f":"26.3\u00b0"}]},{"c":[{"v":"03.02, 11:46"},{"v":"26.4","f":"26.4\u00b0"}]},{"c":[{"v":"03.02, 11:50"},{"v":"26.5","f":"26.5\u00b0"}]},{"c":[{"v":"03.02, 11:54"},{"v":"26.5","f":"26.5\u00b0"}]},{"c":[{"v":"03.02, 11:58"},{"v":"26.5","f":"26.5\u00b0"}]},{"c":[{"v":"03.02, 12:02"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:06"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:10"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:14"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:18"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:22"},{"v":"26.6","f":"26.6\u00b0"}]},{"c":[{"v":"03.02, 12:26"},{"v":"26.7","f":"26.7\u00b0"}]},{"c":[{"v":"03.02, 12:30"},{"v":"26.7","f":"26.7\u00b0"}]}]}';
body {
background-color: black;
}
.gauge {
display: inline-block;
margin-top:20px;
}
#gauges {
max-width:900px;
margin:auto;
text-align:center;
}
#lines {
margin:auto;
position:relative;
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="lines">
<div id="temp_line"></div>
</div>
Thank you in advance.

trendlines are only supported by a continuous x-axis (number, date, etc...)
not a discrete axis (string values)
see following working snippet,
a data view is used to convert the first column to a real date
google.charts.load('current', {
packages: ['gauge', 'corechart', 'line']
}).then(drawTrendlines);
var temp_line;
function drawTrendlines() {
var line_data = jsonString;
function ajaxLines() {
temp_line.setDataTable(view);
temp_line.draw();
setTimeout(ajaxLines, 60 * 1000);
}
var data = new google.visualization.DataTable(line_data);
var view = new google.visualization.DataView(data);
view.setColumns([{
calc: function (dt, row) {
var today = new Date();
var value = dt.getValue(row, 0).replace(' ', '').split(',');
var valueDate = value[0].split('.');
var valueTime = value[1].split(':');
var newValue = new Date(today.getFullYear(), valueDate[1], valueDate[0], valueTime[0], valueTime[1]);
return newValue;
},
label: data.getColumnLabel(0),
type: 'date'
}, 1]);
var options = {
lineWidth: 3,
trendlines: { 0: {} },
height: 400,
hAxis: {
title: 'Zeit',
titleTextStyle: {
color: '#cccccc'
},
baselineColor: '#cccccc'
},
vAxis: {
title: 'Temperatur',
minValue: 20,
maxValue: 29,
titleTextStyle: {
color: '#cccccc'
},
baselineColor: '#cccccc'
},
colors: ['#AB0D06', '#007329'],
curveType: 'function',
//backgroundColor: '#000'
};
temp_line = new google.visualization.ChartWrapper({
chartType: 'LineChart',
dataDataTable: view,
options: options,
containerId: 'temp_line'
});
temp_line.draw();
ajaxLines();
}
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12:26"},{"v":"26.7","f":"26.7\u00b0"}]},{"c":[{"v":"03.02, 12:30"},{"v":"26.7","f":"26.7\u00b0"}]}]}';
body {
background-color: black;
}
.gauge {
display: inline-block;
margin-top:20px;
}
#gauges {
max-width:900px;
margin:auto;
text-align:center;
}
#lines {
margin:auto;
position:relative;
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="lines">
<div id="temp_line"></div>
</div>

Google chart only loads on refresh of page

Am a beginner using google charts/js. My google chart below loads fine, however there are times when the chart area loads blank html, and when I refresh the page it displays correctly.
I'm not sure why this is. It seems to do this on all browsers. This seems to indicate it could be with Mozilla, but the problem persists...
<script type="text/javascript">
google.charts.load('current', {
packages: ['corechart']
}).then(function drawChart() {
<?php
$imei = $bboxx_imei;
$result = shell_exec('Daily_Data_Retriever_ishackweb.py ' . $imei.' '. $end.' '.$start); #imei=sys.arg[1] end=sys.arg[2] start=sys.arg[3]
?>
var jsonData = <?php echo $result; ?> //{"Charge Current, (A)":{"2017-11-16T00:00:00.000Z":0.001373312,"2017-11-16T00:01:00.000Z":0.001373312,"2017-11-16T00:02:00.000Z":0.001373312,"2017-11-16T00:03:00.000Z":0.001373312,"2017-11-16T00:04:00.000Z":0.001373312},"Battery Voltage, (V)":{"2017-11-16T00:00:00.000Z":12.9267109178,"2017-11-16T00:01:00.000Z":12.9267109178,"2017-11-16T00:02:00.000Z":12.9267109178,"2017-11-16T00:03:00.000Z":12.9267109178,"2017-11-16T00:04:00.000Z":12.9267109178}};
var chartCols = ['Datetime'];
Object.keys(jsonData).forEach(function (column) {
chartCols.push(column);
});
// build list of date
var dateValues = [];
Object.keys(jsonData).forEach(function (column) {
Object.keys(jsonData[column]).forEach(function (dateValue) {
if (dateValues.indexOf(dateValue) === -1) {
dateValues.push(dateValue);
}
});
});
// build chart data
var chartData = [chartCols];
dateValues.forEach(function (dateValue) {
var row = [new Date(dateValue)];
Object.keys(jsonData).forEach(function (column) {
row.push(jsonData[column][dateValue] || null);
});
chartData.push(row);
});
var data = google.visualization.arrayToDataTable(chartData);
var options = {
chartArea: {width:'90%', height:'85%'},
//title: 'Battery Voltage and Panel Charge',
curveType: 'function',
legend: { position: 'bottom' },
vAxes: {0: {viewWindowMode:'explicit',
viewWindow:{
max:16,
min:11
},
gridlines: {color: 'transparent'},
},
1: {viewWindowMode:'explicit',
viewWindow:{
max:5,
min:0
},
},
},
series: {0: {targetAxisIndex:1},
1: {targetAxisIndex:0},
},
};
var chart = new google.visualization.LineChart(document.getElementById('line_chart'));
chart.draw(data, options);
$(window).resize(function(){
drawChart()
});
});
</script>

when using a function inline / anonymously, although you can provide a name,
you will not be able to call that same function again, by it's name
google.charts.load('current', {
packages: ['corechart']
}).then(function drawChart() { // <-- cannot call this again, no name needed
...
instead, declare the function separately, then pass a reference where needed,
using the name of the function
google.charts.load('current', {
packages: ['corechart']
}).then(drawChart);
$(window).resize(drawChart);
function drawChart() {
...
}
see following working snippet...
google.charts.load('current', {
packages: ['corechart']
}).then(drawChart);
$(window).resize(drawChart);
function drawChart() {
var jsonData = {"Charge Current, (A)":{"2017-11-16T00:00:00.000Z":0.001373312,"2017-11-16T00:01:00.000Z":0.001373312,"2017-11-16T00:02:00.000Z":0.001373312,"2017-11-16T00:03:00.000Z":0.001373312,"2017-11-16T00:04:00.000Z":0.001373312},"Battery Voltage, (V)":{"2017-11-16T00:00:00.000Z":12.9267109178,"2017-11-16T00:01:00.000Z":12.9267109178,"2017-11-16T00:02:00.000Z":12.9267109178,"2017-11-16T00:03:00.000Z":12.9267109178,"2017-11-16T00:04:00.000Z":12.9267109178}};
var chartCols = ['Datetime'];
Object.keys(jsonData).forEach(function (column) {
chartCols.push(column);
});
// build list of date
var dateValues = [];
Object.keys(jsonData).forEach(function (column) {
Object.keys(jsonData[column]).forEach(function (dateValue) {
if (dateValues.indexOf(dateValue) === -1) {
dateValues.push(dateValue);
}
});
});
// build chart data
var chartData = [chartCols];
dateValues.forEach(function (dateValue) {
var row = [new Date(dateValue)];
Object.keys(jsonData).forEach(function (column) {
row.push(jsonData[column][dateValue] || null);
});
chartData.push(row);
});
var data = google.visualization.arrayToDataTable(chartData);
var options = {
chartArea: {width:'90%', height:'85%'},
//title: 'Battery Voltage and Panel Charge',
curveType: 'function',
legend: { position: 'bottom' },
vAxes: {
0: {
viewWindowMode:'explicit',
viewWindow:{
max:16,
min:11
},
gridlines: {color: 'transparent'},
},
1: {
viewWindowMode:'explicit',
viewWindow:{
max:5,
min:0
},
},
},
series: {
0: {targetAxisIndex:1},
1: {targetAxisIndex:0},
},
};
var chart = new google.visualization.LineChart(document.getElementById('line_chart'));
chart.draw(data, options);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="line_chart"></div>

Issues with setting query ranges on google charts

I'm fairly new to coding with google charts/javascript, and for some reason when I try to draw data from a spreadsheet I can't specify the range.I'm using a tiny example spreadsheet and it still won't work. My java code is below, and I've tried every url modification I could find. Using 'https://docs.google.com/spreadsheets/d/1BHeR6LetK5ztqvgIm53OpbNFjMttRICBBDR8j1yEAjg/edit#gid=0range=2:5'doesn't change the result.
Using 'https://docs.google.com/spreadsheets/d/1BHeR6LetK5ztqvgIm53OpbNFjMttRICBBDR8j1yEAjg/gviz/tq?range=2:5'won't generate a chart even though excluding the range will.
The whole java code is here, what am I doing wrong?:
google.charts.load('current', {
'packages': ['line', 'corechart', 'table']
});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var queryString = encodeURIComponent('SELECT A, H, O, Q, R, U LIMIT 5 OFFSET 8');
var query = new google.visualization.Query(
'https://docs.google.com/spreadsheets/d/1BHeR6LetK5ztqvgIm53OpbNFjMttRICBBDR8j1yEAjg/edit#gid=0range=A1:C2' + queryString);
query.send(handleSampleDataQueryResponse);
}
function handleSampleDataQueryResponse(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var data = response.getDataTable();
var materialOptions = {
chart: {
title: 'Example Data'
},
width: 900,
height: 500,
series: {
0: {
axis: 'Miles'
},
1: {
axis: 'Heartrate'
}
},
axes: {
y: {
Miles: {
label: 'Miles Run'
},
Heartrate: {
label: 'Heart rate(BPM)'
}
}
}
};
function drawMaterialChart() {
var chartDiv = document.getElementById('chart_div');
var materialChart = new google.charts.Line(chartDiv);
materialChart.draw(data, materialOptions);
}
drawMaterialChart();
}

parameters on the url need to separated by --> &
e.g. --> .../edit#gid=0&range=A1:C2
see following working snippet...
google.charts.load('current', {
callback: drawChart,
packages: ['line', 'corechart', 'table']
});
function drawChart() {
var query = new google.visualization.Query(
'https://docs.google.com/spreadsheets/d/1BHeR6LetK5ztqvgIm53OpbNFjMttRICBBDR8j1yEAjg/edit#gid=0&range=A1:C2');
query.send(handleSampleDataQueryResponse);
}
function handleSampleDataQueryResponse(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var data = response.getDataTable();
var materialOptions = {
chart: {
title: 'Example Data'
},
width: 900,
height: 500,
series: {
0: {
axis: 'Miles'
},
1: {
axis: 'Heartrate'
}
},
axes: {
y: {
Miles: {
label: 'Miles Run'
},
Heartrate: {
label: 'Heart rate(BPM)'
}
}
}
};
function drawMaterialChart() {
var chartDiv = document.getElementById('chart_div');
var materialChart = new google.charts.Line(chartDiv);
materialChart.draw(data, materialOptions);
}
drawMaterialChart();
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
note: if you're going to include a query string,
the select statement needs to be within the range set on the url
currently, range only includes columns A thru C
but sql has H, O, Q, R, U
EDIT
drop the range and try using method setQuery to use a SQL statement...
query.setQuery('SELECT A, B, C LIMIT 3');
see following working snippet...
google.charts.load('current', {
callback: drawChart,
packages: ['line', 'corechart', 'table']
});
function drawChart() {
var query = new google.visualization.Query(
'https://docs.google.com/spreadsheets/d/1BHeR6LetK5ztqvgIm53OpbNFjMttRICBBDR8j1yEAjg/edit#gid=0');
query.setQuery('SELECT A, B, C LIMIT 3');
query.send(handleSampleDataQueryResponse);
}
function handleSampleDataQueryResponse(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var data = response.getDataTable();
var materialOptions = {
chart: {
title: 'Example Data'
},
width: 900,
height: 500,
series: {
0: {
axis: 'Miles'
},
1: {
axis: 'Heartrate'
}
},
axes: {
y: {
Miles: {
label: 'Miles Run'
},
Heartrate: {
label: 'Heart rate(BPM)'
}
}
}
};
function drawMaterialChart() {
var chartDiv = document.getElementById('chart_div');
var materialChart = new google.charts.Line(chartDiv);
materialChart.draw(data, materialOptions);
}
drawMaterialChart();
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

country name not show on geochart

This is my code
<script type='text/javascript' src='http://www.google.com/jsapi'></script>
<script type='text/javascript'>google.load('visualization', '1', {'packages': ['geochart']});
google.setOnLoadCallback(drawVisualization);
function drawVisualization()
{
var query = new google.visualization.Query('https://docs.google.com/spreadsheets/d/1dTfxVvfDKn6iXn4W_m7HJ_86JOGNDsxYSSaXipEo0vM/edit#gid=0');
// query.setQuery('select A,B,C');
query.send(handleQueryResponseTR);
}
function handleQueryResponseTR(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var options = {
backgroundColor: {fill:'#FFFFFF',stroke:'#FFFFFF' ,strokeWidth:0 },
colorAxis: {colors: ['#D95F0E','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FFF7BC','#FFF7BC','#FFF7BC','#FFF7BC',]},
backgroundColor: {fill:'#FFFFFF',stroke:'#FFFFFF' ,strokeWidth:0 },
datalessRegionColor: '#F5F0E7',
displayMode: 'regions',
enableRegionInteractivity: 'true',
resolution: 'countries',
sizeAxis: {minValue: 1, maxValue:1,minSize:10, maxSize: 10},
region:'world',
keepAspectRatio: true,
width:800,
height:600,
tooltip: {isHtml:'true',textStyle: {color: '#444444'}, trigger:'focus'}
};
var data = response.getDataTable();
var view = new google.visualization.DataView(data);
view.setColumns([0,{
type:'string',
label : 'num of',
calc: function (dt, row) {
return {
v: dt.getValue(row, 1),
f: dt.getFormattedValue(row, 1) + ': (' + dt.getFormattedValue(row, 2) + ' .)'
}
}
}]);
var chart = new google.visualization.GeoChart(document.getElementById('visualization'));
chart.draw(view, options);
}
</script>
<div id='visualization'></div>
and the spreadsheet here https://docs.google.com/spreadsheets/d/1dTfxVvfDKn6iXn4W_m7HJ_86JOGNDsxYSSaXipEo0vM/edit#gid=0
I don't know why the country name in the first column not show on the geochart
and how can I customize the tooltips such as.. add line break instead of colon(:) I tried br / but it didn't work
anyone can help ?
Thanks

added the following properties to the calculated view field...
role: 'tooltip',
p: {html: true}
see following working snippet...
google.charts.load('current', {
callback: drawVisualization,
packages:['geochart']
});
function drawVisualization() {
var query = new google.visualization.Query('https://docs.google.com/spreadsheets/d/1dTfxVvfDKn6iXn4W_m7HJ_86JOGNDsxYSSaXipEo0vM/edit#gid=0');
query.send(handleQueryResponseTR);
}
function handleQueryResponseTR(response) {
if (response.isError()) {
console.log('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var options = {
backgroundColor: {fill:'#FFFFFF',stroke:'#FFFFFF' ,strokeWidth:0 },
colorAxis: {colors: ['#D95F0E','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FEC44F','#FFF7BC','#FFF7BC','#FFF7BC','#FFF7BC',]},
backgroundColor: {fill:'#FFFFFF',stroke:'#FFFFFF' ,strokeWidth:0 },
datalessRegionColor: '#F5F0E7',
displayMode: 'regions',
enableRegionInteractivity: 'true',
resolution: 'countries',
sizeAxis: {minValue: 1, maxValue:1,minSize:10, maxSize: 10},
region:'world',
keepAspectRatio: true,
width:800,
height:600,
tooltip: {isHtml:'true',textStyle: {color: '#444444'}, trigger:'focus'}
};
var data = response.getDataTable();
var view = new google.visualization.DataView(data);
view.setColumns([0, {
type:'string',
label : 'num of',
calc: function (dt, row) {
return dt.getFormattedValue(row, 1) + ': (' + dt.getFormattedValue(row, 2) + ' .)'
},
role: 'tooltip',
p: {html: true}
}]);
var chart = new google.visualization.GeoChart(document.getElementById('visualization'));
chart.draw(view, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id='visualization'></div>

Animate Google Chart from JSON

All of the examples on how to animate don't cover if the chart is created by JSON data. They all use static data. (See Transition Animation.)
This is my code that gets my data via JSON.
<script type="text/javascript">
google.load("visualization", "1", { packages: ["corechart"] });
google.setOnLoadCallback(drawChart);
function drawChart() {
$.post('/Weight/WeightAreaChartData', {}, function (data) {
var tdata = new google.visualization.arrayToDataTable(data);
var options = {
title: 'Weight Lost & Gained This Month',
hAxis: { title: 'Day of Month', titleTextStyle: { color: '#1E4A08'} },
vAxis: { title: 'Lbs.', titleTextStyle: { color: '#1E4A08' } },
chartArea: { left: 50, top: 30, width: "75%" },
colors: ['#FF8100'],
animation:{
duration: 1000,
easing: 'in'
},
};
var chart = new google.visualization.AreaChart(
document.getElementById('chart_div')
);
chart.draw(tdata, options);
});
}
</script>
I have a button that redraws the chart successfully. However, it doesn't animate. How can I make the chart animate? Thank you for your help.
$('#myBtn').click(function () {
drawChart();
});

Maybe cause you're creating the chart everytime?
Try to make chart a global variable and try again

As eluded to by #FelipeFonseca, you're overwriting the chart each time #myBtn is clicked. Try doing this instead:
(function (global, undef) {
google.load("visualization", "1", { packages: ["corechart"] });
google.setOnLoadCallback(drawChart);
var options = {
title: 'Weight Lost & Gained This Month',
hAxis: { title: 'Day of Month', titleTextStyle: { color: '#1E4A08'} },
vAxis: { title: 'Lbs.', titleTextStyle: { color: '#1E4A08' } },
chartArea: { left: 50, top: 30, width: "75%" },
colors: ['#FF8100'],
animation:{
duration: 1000,
easing: 'in'
}
};
var chart;
function drawChart() {
$.post('/Weight/WeightAreaChartData', {}, function (data) {
var tdata = new google.visualization.arrayToDataTable(data);
if (!chart) {
chart = new google.visualization.AreaChart(
document.getElementById('chart_div')
);
}
chart.draw(tdata, options);
});
}
})(this);