Google line chart dividing grid line - javascript

I have created a google line chart that has multiple values over time like this
The data refers to historical data and from a point in time is forecasted data. I want to divide (split) the chart to differentiate the historical information of forecast information.
And get a chart like this:
Is there a way to do that?

You can get a vertical line like that by adding an 'annotation' role column to your domain (x-axis) column in the DataTable, and setting the annotation.<annotation column index>.style option to 'line'. Here's an example:
function drawChart () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn({type: 'string', role: 'annotation'});
data.addColumn('number', 'Value');
data.addRows([
['Jun', null, 3],
['Jul', null, 5],
['Aug', null, 4],
['Sep', null, 4],
['Oct', null, 8],
['Nov', 'this month', 6],
['Dec', null, 2]
]);
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, {
height: 400,
width: 600,
annotation: {
1: {
style: 'line'
}
}
});
}
google.load('visualization', '1', {packages:['corechart'], callback: drawChart});
see it working here: http://jsfiddle.net/asgallant/pkwqt/

Related

Removing the gap between the datapoints

Graph: Number of Persons v DateTime
2004-12-23 15:25:01,8
2004-12-23 15:26:01,5
2004-12-23 15:27:01,5
2004-12-23 15:28:01,4
2004-12-23 15:29:01,4
2004-12-24 10:30:01,13
2004-12-24 10:31:01,12
2004-12-24 10:32:01,12
2004-12-24 10:33:01,13
2004-12-24 10:34:01,13
2004-12-24 10:35:01,13
As we can see there is no data between 2004-12-23 15:29:01 and 2004-12-24 10:30:01 but still the Google Chart shows me a gap and connects the two datapoints when using LineChart. Also I avoid making the dates string as then I would get no yaxis markings, because of the huge date-time.
I am new to using Google Charts, can this be avoided?
function drawBasic() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date-Time');
data.addColumn('number', ‘Available);
data.addRows(dataPoints);
console.log(data);
var options = {
title: ‘Availability',
legend: {position: 'bottom' },
hAxis: {
title: 'Time',
/*
viewWindow: {
min: [7, 30, 0],
max: [17, 30, 0]
}*/
},
vAxis: {
title: 'Number of people available’
}
};
var chart = new google.visualization.LineChart(
document.getElementById('chart_div'));
chart.draw(data, options);
}
if you use string values, rather than date values, no gap will be displayed...
var dataPoints = [
['2004-12-23 15:25:01', 8],
['2004-12-23 15:26:01', 5],
['2004-12-23 15:27:01', 5],
...
also, here, needed to add more room at the bottom of the chart for the labels,
as well as increase the default height...
chartArea: {
bottom: 128
},
height: 400
see following working snippet...
google.charts.load('current', {
packages: ['corechart']
}).then(drawBasic);
function drawBasic() {
var dataPoints = [
['2004-12-23 15:25:01', 8],
['2004-12-23 15:26:01', 5],
['2004-12-23 15:27:01', 5],
['2004-12-23 15:28:01', 4],
['2004-12-23 15:29:01', 4],
['2004-12-24 10:30:01', 13],
['2004-12-24 10:31:01', 12],
['2004-12-24 10:32:01', 12],
['2004-12-24 10:33:01', 13],
['2004-12-24 10:34:01', 13],
['2004-12-24 10:35:01', 13]
];
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date-Time');
data.addColumn('number', 'Available');
data.addRows(dataPoints);
var options = {
title: 'Availability',
legend: {position: 'bottom'},
hAxis: {
title: 'Time',
},
vAxis: {
title: 'Number of people available'
},
chartArea: {
bottom: 128
},
height: 400
};
var chart = new google.visualization.LineChart(
document.getElementById('chart_div')
);
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Multiple lines over google candlestick chart

I'm trying to create a google candlestick chart, but also trying to overlay multiple lines on the same chart.
I'm able to draw one line over the candlestick if I do something like the following:
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Low');
data.addColumn('number', 'Open');
data.addColumn('number', 'Close');
data.addColumn('number', 'High');
data.addColumn('number', 'Average');
data.addRow('Mon', 1, 1, 2, 2, 1.5]);
data.addRow('Tue', 2, 2, 3, 3, 2.5]);
data.addRow('Wed', 2, 2, 4, 4, 3.5]);
var options = {
legend:'none',
series: {1: {type: 'line'}}
};
But I can't seem to figure out how to add a second line.
To avoid confusion, I'll leave out all of the things I've attempted, but the goal is to just add another data column and specify whatever is necessary to tell the chart to overlay the new data as a second line.
Is there any way to make this work?
sure, just keep adding line series as you have, using the series option...
for the CandleStickChart, five columns are required,
those five columns count as one series,
in this example, series 0
which makes the 6th column series 1
which you've changed to 'line'
1: {type: 'line'}
adding another column would be series 2,
just add another column and change the type...
1: {type: 'line'},
2: {type: 'line'}
see following working snippet...
google.charts.load('current', {
packages: ['corechart']
}).then(function () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Low');
data.addColumn('number', 'Open');
data.addColumn('number', 'Close');
data.addColumn('number', 'High');
data.addColumn('number', 'Average');
data.addColumn('number', 'Average 2');
data.addRow(['Mon', 1, 1, 2, 2, 1.5, 2.5]);
data.addRow(['Tue', 2, 2, 3, 3, 2.5, 3.5]);
data.addRow(['Wed', 2, 2, 4, 4, 3.5, 4.5]);
var options = {
legend: 'none',
series: {
1: {type: 'line'},
2: {type: 'line'}
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.CandlestickChart(container);
chart.draw(data, options);
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Google visualization set column dock

I am struggling with google charts. I want bars to be displayed from bottom, rather than from top. Currently they are "hanging" like on the image below:
I don't see proper setting in docs, if it is there, please correct me. This is the code responsible for handling the display:
function parseInterval(value) {
var result = new Date(1,1,1);
result.setMilliseconds(value*1000);
return result;
}
(function($) {
$(document).ready(function(){
var loading = $('#loading');
$.getJSON("/api/v1/users", function(result) {
var dropdown = $("#user_id");
$.each(result, function(item) {
dropdown.append($("<option />").val(this.user_id).text(this.name));
});
dropdown.show();
loading.hide();
});
$('#user_id').change(function(){
var selected_user = $("#user_id").val();
var chart_div = $('#chart_div');
if(selected_user) {
loading.show();
chart_div.hide();
$.getJSON("/api/v1/mean_time_month/"+selected_user, function(result) {
$.each(result, function(index, value) {
value[1] = parseInterval(value[1]);
});
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('datetime', 'Mean time (h:m:s)');
data.addRows(result);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
title: 'Mean presence time',
minValue: new Date(1, 1, 1, 0, 0)
},
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
chart_div.show();
loading.hide();
var chart = new google.visualization.ColumnChart(chart_div[0]);
chart.draw(data, options);
});
}
});
});
})(jQuery);
try using option vAxis.direction...
The direction in which the values along the vertical axis grow. Specify -1 to reverse the order of the values.
vAxis: {
direction: -1
}
see following working snippet...
google.charts.load('current', {
callback: drawChart,
packages:['corechart']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('datetime', 'Mean time (h:m:s)');
data.addRows([
['Jan', new Date(1, 1, 1, 8, 16, 13)],
['Feb', new Date(1, 1, 1, 9, 24, 45)],
['Mar', new Date(1, 1, 1, 7, 36, 56)],
['Apr', new Date(1, 1, 1, 4, 20, 42)],
['May', new Date(1, 1, 1, 6, 51, 16)]
]);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
direction: -1,
title: 'Mean presence time',
minValue: new Date(1, 1, 1, 0, 0)
}
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
but i think the real problem lies within the data
notice the y-axis values the chart displays in the example above,
the order doesn't seem right, as well as the range (10am - 12am)
it appears you're only interested in the time values
as such, recommend using 'timeofday' vs. 'datetime'
(see --> working with timeofday)
The DataTable 'timeofday' column data type takes an array of either 3 or 4 numbers, representing hours, minutes, seconds, and optionally milliseconds, respectively. Using timeofday is different than using date and datetime in that the values are not specific to a date, whereas date and datetime always specify a date.
For example, the time 8:30am would be: [8, 30, 0, 0], with the 4th value being optional ([8, 30, 0] would output the same 'timeofday' value).
see following working snippet for example using 'timeofday'...
google.charts.load('current', {
callback: drawChart,
packages:['corechart']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('timeofday', 'Mean time (h:m:s)');
data.addRows([
['Jan', [8, 16, 13]],
['Feb', [9, 24, 45]],
['Mar', [7, 36, 56]],
['Apr', [4, 20, 42]],
['May', [6, 51, 16]]
]);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
title: 'Mean presence time',
minValue: [0, 0, 0]
}
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Google line chart show all custom tooltips

I have to create a line chart where a few of the points have tooltips or other balloons/captions/texboxes with information about the point. They must always be displayed, not only on mouse over. Basically a google annotation chart, but with the data on the chart.
I tried the code below, which doesn't even show the tooltip as it should. Any thoughts, or should I choose a different technology? Thanks.
google.load('visualization', '1.1', { packages: ['line'] });
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Day');
data.addColumn('number', 'Score');
data.addColumn({type: 'string', role: 'tooltip' });
data.addRows([
[1, 37, 'This score occurred in Texas in 1959.'],
[2, 30, ''],
[3, 25, ''],
]);
var options = {
chart: {
title: 'Important Chart',
subtitle: 'in millions of dollars (USD)'
},
width: 900,
height: 500,
legend: 'none',
axes: {
x: {
0: { side: 'top' }
}
}
};
var chart = new google.charts.Line(document.getElementById('line_top_x'));
chart.draw(data, options);
}
You would want to use role:'annotation' instead of role: 'tooltip'. Annotation allows you to display the text without any user interaction. See the documentation on annotationRole for more info.
Working Code: http://jsfiddle.net/wkyg2brg/
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Day');
data.addColumn('number', 'Score');
data.addColumn({type:'string', role:'annotation'});
data.addRows([
[1, 37, 'This score occurred in Texas in 1959.'],
[2, 30, ''],
[3, 25, ''],
]);
var options = {
chart: {
title: 'Important Chart',
subtitle: 'in millions of dollars (USD)'
},
width: 900,
height: 500,
legend: 'none',
axes: {
x: {
0: { side: 'top' }
}
}
};
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data,options);
}

How Draw Vertical Line to Histogram Graph on Google Charts?

If I draw a line chart there is no problem but I want to have this on a histogram graph.. (https://developers.google.com/chart/interactive/docs/gallery/histogram)
For LineChart;
var chart = new google.visualization.LineChart(document.querySelector('#chart_div'));
For Histogram;
var chart = new google.visualization.Histogram(document.querySelector('#chart_div'));
Other Codes;
function drawChart () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn({type: 'string', role: 'annotation'});
data.addColumn('number', 'Value');
data.addRows([
['Foo', null, 4],
['Bar', null, 3],
['Baz', null, 7],
['Bat', null, 9],
['Cad', 'Vertical line here', 9],
['Qud', null, 2],
['Piz', null, 6]
]);
var chart = new google.visualization.Histogram(document.querySelector('#chart_div'));
chart.draw(data, {
height: 300,
width: 400,
annotation: {
// index here is the index of the DataTable column providing the annotation
1: {
style: 'line'
}
}
});
}
Daniel LaLiberte answered my question on Google Groups, who is a Senior Software Engineer at Google..
https://groups.google.com/forum/#!msg/google-visualization-api/7y3LrKETEwY/fR4HoYwBu-EJ
So it is not possible on Google Charts..
But :) Google Charts uses SVG.. For exp. I want to draw a line to 30 x axis..
var newLine = document.createElementNS('http://www.w3.org/2000/svg', 'line');
newLine.setAttribute('id', 'lineId');
newLine.setAttribute('style', 'stroke:rgb(0,0,0); stroke-width:3;');
newLine.setAttribute('x1', chart.getChartLayoutInterface().getXLocation(30));
newLine.setAttribute('y1', chart.getChartLayoutInterface().getChartAreaBoundingBox().top);
newLine.setAttribute('x2', chart.getChartLayoutInterface().getXLocation(30));
newLine.setAttribute('y2', chart.getChartLayoutInterface().getChartAreaBoundingBox().height + chart.getChartLayoutInterface().getChartAreaBoundingBox().top);
$("svg").append(newLine);

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