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I'd like to create column chart with X axis numeric values 1, 2, 3, 4 ... N and Y value of course different on every column.
I can't find out how to change labels on X line under bars, to string. For example - 1 could be marked as Elephant, 2 as Horse etc.
I could use string as X values, but then there is no way to get zoom working. At least, I didn't find any way to get it working.
simple example with strings, I'd like to achieve same appearance as this one, but with numeric values on X axis.
google.charts.load('current', {packages: ['corechart', 'bar']});
google.charts.setOnLoadCallback(drawBasic);
function drawBasic() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'animal');
data.addColumn('number', 'count');
data.addRows([
['Elephant', 5],
['Horse', 2],
['Dog', 7],
['Cat', 4],
]);
var options = {
explorer: {
axis: 'horizontal',
keepInBounds: true,
},
title: 'Testing',
hAxis: {
title: 'Animal',
},
vAxis: {
title: 'number'
}
};
var chart = new google.visualization.ColumnChart(
document.getElementById('chart_div'));
chart.draw(data, options);
}
Chart should look like this, but with working zoom:
Chart example
to use string labels on a continuous axis,
you will need to provide your own ticks
using object notation, provide the value (v:) and formatted value (f:)
{v: 1, f: 'Elephant'}
see following working snippet...
google.charts.load('current', {
callback: drawBasic,
packages: ['corechart']
});
function drawBasic() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'animal');
data.addColumn('number', 'count');
data.addRows([
[1, 5],
[2, 2],
[3, 7],
[4, 4]
]);
var options = {
explorer: {
axis: 'horizontal'
},
title: 'Testing',
hAxis: {
ticks: [
{v: 1, f: 'Elephant'},
{v: 2, f: 'Horse'},
{v: 3, f: 'Dog'},
{v: 4, f: 'Cat'}
],
title: 'Animal',
},
vAxis: {
title: 'number'
}
};
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>
I've 2 google charts on one page and both are displayed correctly. The problem is when I set fontName of both charts to 'Open Sans', only one chart is displayed. If both charts have some other font like 'Arial', then both are displayed. Also, if fontName for one chart is 'Open Sans' and 'Arial' for other, both charts are displayed. Error is only with 'Open Sans' for both charts. I've included Below is my code snippet. Can't get a solution to this. Please help. Thanks in advance..!!
<script type="text/javascript">
function commodityChart(){
// Load the Visualization API and the piechart package.
google.load('visualization', '1.1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
// Callback that creates and populates a data table,
// instantiates the pie chart, passes in the data and
// draws it.
function drawChart() {
// Create the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Topping');
data.addColumn('number', 'Slices');
data.addRows([
for($i=0;$i<count($data);$i++){
if($data[$i]->SEGMENT == 'COMMODITY'){
echo "['" . $data[$i]->PARAMETER . "'," . $data[$i]->AMOUNT . "],";
}
}
?>
]);
var formatter = new google.visualization.NumberFormat({prefix: '₹', format:'##,##,###.00'} );
formatter.format(data, 1);
// Set chart options
var options = {pieHole: 0.4,
fontSize: 13,
fontName: 'Open Sans',
is3D : true,
pieSliceText: 'value',
sliceVisibilityThreshold: 0,
// pieStartAngle: 100,
slices: {0: {offset: 0.3}},
//fontName: 'Open Sans',
legend: {position: 'right', alignment:'end'},
colors: ['#9bc53d', '#FF9900'],
'width':600,
// chartArea:{left:30,top:20,width:'70%',height:'75%'},
'height':500};
// Instantiate and draw our chart, passing in some options.
var chart = new google.visualization.PieChart(document.getElementById('gchart_pie_2'));
chart.draw(data, options);
}
}
</script>
<script type="text/javascript">
function equityChart(){
// Load the Visualization API and the piechart package.
google.load('visualization', '1.1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart1);
// Callback that creates and populates a data table,
// instantiates the pie chart, passes in the data and
// draws it.
function drawChart1() {
// Create the data table.
var data1 = new google.visualization.DataTable();
data1.addColumn('string', 'type');
data1.addColumn('number', 'amount');
//data.addColumn({type: 'string', role: 'tooltip'});
data1.addRows([
<?
for($i=0;$i<count($data);$i++){
if($data[$i]->SEGMENT == 'EQUITY'){
echo "['" . $data[$i]->PARAMETER . "'," . $data[$i]->AMOUNT . "],";
}
}
?>
]);
var formatter = new google.visualization.NumberFormat({prefix: '₹', format:'##,##,###.00'} );
formatter.format(data1, 1);
// Set chart options
var options1 = {pieHole: 0.4,
is3D: true,`enter code here`
legend: {position: 'right', alignment:'end'},
//fontSize: 13,
fontName: 'Open Sans',
forceIFrame: false,
// pieSliceBorderColor: 'red',
pieSliceText: 'value',
//pieSliceTextStyle: {fontName: 'Open Sans', fontSize: 13},
chartArea:{left:20,top:20,width:'70%',height:'75%'},
// pieStartAngle: 20,
// slices: {0: {offset: 0.4}},
sliceVisibilityThreshold: 0,
// colors: ['#5bc0eb','#fde74c', '#9bc53d', '#e55934', '#fa7921'],
colors: ['#9bc53d','#fde74c', '#e55934', '#5bc0eb', '#FF9900'],
//tooltip: {isHtml: true},
'width':600,
'height':500};
// Instantiate and draw our chart, passing in some options.
var chart1 = new google.visualization.PieChart(document.getElementById('gchart_pie_1'));
chart1.draw(data1, options1);
}
}
enter code here
Try drawings the charts one at a time, that seems to fix the problem...
Here, I use the ready event to wait for the first chart to draw, then draw the second.
google.load('visualization', '1.1', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
commodityChart();
}
function commodityChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Topping');
data.addColumn('number', 'Slices');
data.addRows([
['Pepperoni', 33],
['Hawaiian', 26],
['Mushroom', 22],
['Sausage', 10],
['Anchovies', 9]
]);
var options = {
pieHole: 0.4,
fontSize: 13,
fontName: 'Open Sans',
is3D: true,
pieSliceText: 'value',
sliceVisibilityThreshold: 0,
slices: {
0: {
offset: 0.3
}
},
legend: {
position: 'right',
alignment:'end'
},
colors: [
'#9bc53d',
'#FF9900'
],
width: 600,
height: 500
};
var chart = new google.visualization.PieChart(document.getElementById('gchart_pie_2'));
google.visualization.events.addListener(chart, 'ready', equityChart);
chart.draw(data, options);
}
function equityChart() {
var data1 = new google.visualization.DataTable();
data1.addColumn('string', 'type');
data1.addColumn('number', 'amount');
data1.addRows([
['Work', 11],
['Eat', 2],
['Commute', 2],
['Watch TV', 2],
['Sleep', 7]
]);
var options1 = {
pieHole: 0.4,
is3D: true,
legend: {
position: 'right',
alignment: 'end'
},
fontName: 'Open Sans',
forceIFrame: false,
pieSliceText: 'value',
chartArea: {
left: 20,
top: 20,
width: '70%',
height: '75%'
},
sliceVisibilityThreshold: 0,
colors: [
'#9bc53d',
'#fde74c',
'#e55934',
'#5bc0eb',
'#FF9900'
],
width: 600,
height: 500
};
var chart1 = new google.visualization.PieChart(document.getElementById('gchart_pie_1'));
chart1.draw(data1, options1);
}
<script src="https://www.google.com/jsapi"></script>
<div id="gchart_pie_1"></div>
<div id="gchart_pie_2"></div>
I'm writing a Google Chart. It has stacked columns. On top of that I want to draw 2 lines, which indicate min and max allowed value.
The only solution I came up with, was modifying the first example of ComboCharts. My result looks like this:
Which isn't sufficient. The graph is variable, so if there's only 1 Quartal shown, the line will solely be a dot. My Questions are:
Is there a way to draw the line further, so it hits the left and right boundary of the Graph?
Can I draw markup lines into the graph, without pretending it's another datapoint?
You can fiddle with a ComboChart here if you want.
You can't get the lines to go edge-to-edge with a discrete (string-based) x-axis. If you switch to a continuous (number, date, datetime, timeofday) axis, then you can add one row before your real data and one row after that contain the goal lines (and nulls for the other data series):
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Quarter');
data.addColumn('number', 'Value 1');
data.addColumn('number', 'Value 2');
data.addColumn('number', 'Value 3');
data.addColumn('number', 'Goal 1');
data.addColumn('number', 'Goal 2');
data.addRows([
[0, null, null, null, 10, 14],
[1, 5, 4, 7, null, null],
[2, 6, 9, 6, null, null],
[3, 2, 6, 4, null, null],
[4, 3, 6, 4, null, null],
[5, null, null, null, 10, 14]
]);
var chart = new google.visualization.ComboChart(document.querySelector('#chart_div'));
chart.draw(data, {
height: 400,
width: 600,
isStacked: true,
legend: {
position: 'top'
},
seriesType: 'bars',
interpolateNulls: true,
series: {
3: {
type: 'line'
},
4: {
type: 'line'
}
},
hAxis: {
format: 'Q#',
ticks: [1, 2, 3, 4],
viewWindow: {
min: 0.5,
max: 4.5
}
},
chartArea: {
left: '10%',
width: '80%'
}
});
}
google.load('visualization', '1', {packages:['corechart'], callback: drawChart});
See working example: http://jsfiddle.net/asgallant/W67qU/
Here is some explanation of what is going on (edit on Nov 24, 2022 by Jorr.it):
At the top and bottom of the DataTable there are extra rows added with the goals only. With the hAxis.viewWindow option the two new goal dots are just cut off the chart, but resulting in a full line over the whole width of the chart. Finally option "interpolateNulls" needs to be set to connect the two invisible dots "over" the null values in the bar rows.
Maybe a bit late but I faced the same issue. I was trying to set max and min lines into a line chart with a lot of data points in the serie and I wanted to avoid adding new series with a lot of repeated points so I used overlays ( https://developers.google.com/chart/interactive/docs/overlays#javascript2 ).
Here are an example, It's just a draft in which I'm working now but maybe can help:
<html>
<head>
<script
type="text/javascript"
src="https://www.gstatic.com/charts/loader.js"
></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<style>
#container {
position: relative;
width: 900px;
height: 500px;
}
.min-bar {
height: 1px;
background-color: red;
position: absolute;
left: 0;
right: 0;
}
</style>
<script type="text/javascript">
$(function() {
$.get(
"https://firebasestorage.googleapis.com/v0/b/manasav-pricetracker.appspot.com/o/products%2F-L6O-CtBKZAc2NTCFq7Z.data?alt=media&token=60e06bb6-59b7-41a9-8fd0-f82f4ddc75f2",
function(data) {
google.charts.load("current", { packages: ["corechart"] });
google.charts.setOnLoadCallback(drawChart);
var downloadedData = JSON.parse("[" + data);
function drawChart() {
var dataTable = [["Time", "New"]];
let min = Number.MAX_VALUE;
let rowMin;
for (var i in downloadedData) {
var d = downloadedData[i];
if (d.new < min) {
rowMin = i;
min = d.new;
}
dataTable.push([new Date(d.date), d.new]);
}
var data = google.visualization.arrayToDataTable(dataTable);
var options = {
title: "Price evolution",
legend: { position: "bottom" },
trendlines: { 0: {} }
};
var chart = new google.visualization.LineChart(
document.getElementById("curve_chart")
);
function placeMarker(dataTable) {
var cli = this.getChartLayoutInterface();
var chartArea = cli.getChartAreaBoundingBox();
document.querySelector(".min-bar").style.top =
Math.floor(cli.getYLocation(min)) + "px";
document.querySelector(".min-bar").style.left =
Math.floor(cli.getXLocation(dataTable.getValue(0,0))) - 25 + "px";
document.querySelector(".min-bar").style.right =
(document.querySelector("#container").offsetWidth - Math.floor(cli.getXLocation(dataTable.getValue(dataTable.getNumberOfRows()-1,0)))) - 25 + "px";
// document.querySelector(".min-bar").style.top =
// Math.floor(cli.getXLocation(dataTable.getValue(rowMin, 1))) +
// "px";
}
google.visualization.events.addListener(
chart,
"ready",
placeMarker.bind(chart, data)
);
chart.draw(data, options);
}
}
);
});
</script>
</head>
<body>
<div id="container">
<div id="curve_chart" style="width: 900px; height: 500px"></div>
<div class="min-bar"></div>
</div>
</body>
</html>
Jsfiddle demo => https://jsfiddle.net/jRubia/8z7ao1nh/
I'm trying to create a Google chart that looks like the following:
http://chart.googleapis.com/chart?cht=bvs&chs=200x125&chd=t2:10,50,60,80,40%7C50,60,100,40,20%7C30,70,90,95,45&chco=4d89f900,c6d9fd&chbh=20&chds=0,160&chm=H,336699,2,-1,1:22
Basically, I just want to represent the max, min, and average all on one chart, but I can't seem to figure out how to do this. I know it's possible using markers with the old URL-based charts, but they're being deprecated and it doesn't look like the new API supports markers yet.
I tried using candlesticks, but the only way I got it working was with a skinny line and a horizontal line in the middle, so it looked like a bunch of plus signs rather than floating columns with line markers. I know I could also technically stack a column chart with a stepped area chart, but then the line is continuous across all entries, which I don't want.
Thanks.
EDIT: Using jmac's method and intervals, I came up with this:
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'label');
data.addColumn('number', 'filler');
data.addColumn('number', 'range');
data.addColumn({type:'number', role:'interval'});
data.addRows([
['A', 3, 4, 2],
['B', 2, 5, 4],
['C', 4, 4, 1],
['D', 5, 2, 1],
['E', 1, 8, 4],
]);
// Create and draw the visualization.
var ac = new google.visualization.ColumnChart(document.getElementById('visualization'));
ac.draw(data, {
width: 600,
isStacked: true,
series: [{color:'transparent'},{color:'silver'},{color:'silver'}],
vAxis: {gridlines: {color: 'transparent'}, textPosition: 'none'},
focusTarget: 'category',
intervals: { 'style': 'bars', 'barWidth': 1.3, 'lineWidth': 2 },
});
}
I don't have enough reputation to post an image of what it looks like yet, but if you paste it in here you can see it: https://code.google.com/apis/ajax/playground/?type=visualization#column_chart
Also, since it still highlights the filler area when you mouse over it, I found a css hack to hide the highlighting on mouse over:
#chart-div {
svg g g g g rect {
stroke-width:0px;
}
}
You can use "box" style intervals to accomplish what you want:
function drawChart () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Category');
data.addColumn('number', 'Min');
data.addColumn('number', 'Average');
data.addColumn('number', 'Max');
data.addRows([
['Foo', 3, 5, 7],
['Bar', 5, 8, 10],
['Baz', 0, 2, 6],
['Bat', 1, 2, 4]
]);
var view = new google.visualization.DataView(data);
// duplicate 1 column as a dummy data series, and add intervals to it
view.setColumns([0, 1, {
id: 'min',
type: 'number',
role: 'interval',
calc: function (dt, row) {
return dt.getValue(row, 1);
}
}, {
id: 'avg',
type: 'number',
role: 'interval',
calc: function (dt, row) {
return dt.getValue(row, 2);
}
}, {
id: 'max',
type: 'number',
role: 'interval',
calc: function (dt, row) {
return dt.getValue(row, 3);
}
}, 1, 2, 3]);
var chart = new google.visualization.LineChart(document.querySelector('#chart_div'));
chart.draw(view, {
height: 400,
width: 600,
lineWidth: 0,
intervals: {
style: 'boxes'
},
legend: {
position: 'none'
},
series: {
0: {
// dummy data series, controls color of intervals
visibleInLegend: false,
color: 'blue',
enableInteractivity: false
},
1: {
// min series options
},
2: {
// average series options
},
3: {
// max series options
}
}
});
}
google.load('visualization', '1', {packages:['corechart'], callback: drawChart});
See working example: http://jsfiddle.net/asgallant/pvJpx/
If all you care about is how it looks visually, you can recreate this with a bit of finagling to have it look like this:
This is the code:
function drawVisualization() {
// Create and populate the data table.
var data = google.visualization.arrayToDataTable([
['label', 'filler', 'bot half', 'top half'],
['A', 3, 2, 2],
['B', 2, 4, 1],
['C', 4, 1, 3],
['D', 5, 1, 1],
['E', 1, 4, 4],
]);
// Create and draw the visualization.
var ac = new google.visualization.ColumnChart(document.getElementById('visualization'));
ac.draw(data, {
width: 600,
isStacked: true,
series: [{color:'transparent'},{color:'silver'},{color:'silver'}],
vAxis: {gridlines: {color: 'transparent'}, textPosition: 'none'},
focusTarget: 'category',
});
}
This is a dumb workaround, but here are the steps given a min value, a max value, and an avg value:
Create a dummy (transparent) series equal to min
Create a second series for the bottom half of the bar equal to avg - min
Create a third series for the top half of the bar equal to max - avg
Although it looks right, the issue is that interaction with the chart will be real funky, in the sense that it won't show you what you would expect from the chart (you would have separate values that aren't showing min, max, and average, but only two values for the size of points 2) and 3) above). You can get around this with creative use of focusTarget, but that will still get you odd stuff like this:
Now you could theoretically rename your series, and use the {v:, f:} trick to make it look nicer, and that may be a good workaround, but it is very kludgy depending on your application. If you finagle it all nice and right, you would get something like this:
This is done with the following code:
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Series Name');
data.addColumn('number', 'Average');
data.addColumn('number', 'Minimum');
data.addColumn('number', 'Maximum');
data.addRows([
['A', {v:3, f:'5'}, {v:2, f:'3'}, {v:2, f:'7'}],
['B', {v:2, f:'6'}, {v:4, f:'2'}, {v:1, f:'7'}],
['C', {v:4, f:'5'}, {v:1, f:'4'}, {v:3, f:'8'}],
['D', {v:5, f:'6'}, {v:1, f:'5'}, {v:1, f:'8'}],
['E', {v:1, f:'5'}, {v:4, f:'1'}, {v:4, f:'9'}],
]);
// Create and draw the visualization.
var ac = new google.visualization.ColumnChart(document.getElementById('visualization'));
ac.draw(data, {
width: 600,
isStacked: true,
series: [{color:'transparent'},{color:'silver'},{color:'silver'}],
vAxis: {gridlines: {color: 'transparent'}, textPosition: 'none'},
focusTarget: 'category',
});
}
Again, this is kludgy and not perfect (see the grey box around the filler series, that can't be helped), but it will display the info, and it can be automated using some fancy javascript and/or formatters with dataviews depending on how often the charts need to be changed and what format you get your data in.
How do you change the color of an annotation text in Google Chart Tools LineChart ?
Here is an example
google.load('visualization', '1', {packages: ['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Sales');
data.addColumn({id: 'title', label: 'Title', type: 'string', role: 'annotation'});
data.addRows([
[new Date(2012, 3, 5), 80, null],
[new Date(2012, 3, 12), 120, 'New Product'],
[new Date(2012, 3, 19), 80, null],
[new Date(2012, 3, 26), 65, null],
[new Date(2012, 4, 2), 70, null],
]);
var options = {
title: 'Sales by Week',
displayAnnotations: true,
hAxis: {title: 'Date',
titleTextStyle: {color: 'grey'}},
colors: ['#f07f09']
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
I want the line to be orange and the annotation text in grey. Currently the annotation text is orange.
No need for extra style data column and plumbing code to fill it for every row with ugly (and even incomplete above) formatting string. Only resort to separate styling column if you want to have different annotation color for the different data points.
There's a global setting, search for annotations.textStyle in https://developers.google.com/chart/interactive/docs/gallery/linechart
var options = {
annotations: {
textStyle: {
fontName: 'Times-Roman',
fontSize: 18,
bold: true,
italic: true,
// The color of the text.
color: '#871b47',
// The color of the text outline.
auraColor: '#d799ae',
// The transparency of the text.
opacity: 0.8
}
}
};
Here is a concept code for your case (notice different initialization google.charts, very important):
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
google.charts.load('current', { 'packages': ['corechart', 'line', 'bar'] });
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Sales');
data.addColumn({id: 'title', label: 'Title', type: 'string', role: 'annotation'});
data.addRows([
[new Date(2012, 3, 5), 80, null],
[new Date(2012, 3, 12), 120, 'New Product'],
[new Date(2012, 3, 19), 80, null],
[new Date(2012, 3, 26), 65, null],
[new Date(2012, 4, 2), 70, null],
]);
var options = {
chart: {
title: 'Sales by Week'
},
hAxis: {
title: 'Date',
titleTextStyle: {color: 'grey'}
},
annotations: {
textStyle: {
color: 'grey',
}
}
colors: ['#f07f09']
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
You can also change other text formatting of the annotation, like bold, italic, font type, etc. Here is an example where most of the text is configured to be bold:
var options = {
chart: {
title: title
},
hAxis: {
textStyle: {
bold: true
}
},
vAxis: {
format: 'decimal',
textStyle: {
bold: true
}
},
legendTextStyle: {
bold: true
},
titleTextStyle: {
bold: true
},
width: chart_width,
//theme: 'material', // material theme decreases the color contrast and sets the black color items (all text) to 171,171,171 grey -> washed out
annotations: {
alwaysOutside: true,
highContrast: true, // default is true, but be sure
textStyle: {
bold: true
}
}
};
More examples with source repo link: https://mrcsabatoth.github.io/GoogleChartsTalk/
Actually you can. Color of the annotations is the same as line color. Just put a dot in the place you want to make an annotation and set a dot's color to the desirable annotation color.
data.addColumn({type: 'string', role: 'style'});
data.addColumn({type:'string', role:'annotation'});
and then when you add data
'point { size: 14; shape-type: circle; fill-color: #63A74A','Your annotation'
See example at
http://www.marketvolume.com/stocks/stochasticsmomentumindex.asp?s=SPY&t=spdr-s-p-500
If your annotations are not "touching", ie. the points you'd like to annotate are not next to each other, you could add a second line and add the annotations to that line.
In the JSON example below I have a date and a "total balance", as well as an "Ann" line.
"cols":[
{
"id":"date",
"label":"date",
"type":"date",
"p":{
"role":"domain"
}
},
{
"id":"total-balance",
"label":"Total balance",
"type":"number",
"p":{
"role":"data"
}
},
{
"id":"ann",
"label":"Ann",
"type":"number",
"p":{
"role":"data"
}
},
{
"type":"string",
"p":{
"role":"annotation"
}
},
{
"type":"string",
"p":{
"role":"annotationText"
}
}
],
The annotation comes after the "Ann" column so it'll be added to the "Ann" data points.
In my JSON, the date and "total-balance" are always filled in. "Ann" and the annotations are usually empty:
"rows":[
{
"c":[
{
"v":"Date(2013, 0, 1)"
},
{
"v":1000
},
{
"v":null
},
{
"v":null
},
{
"v":null
}
]
},
{
"c":[
{
"v":"Date(2013, 0, 8)"
},
{
"v":1001
},
{
"v":null
},
{
"v":null
},
{
"v":null
}
]
},
When I need an annotation, the "Ann" cell gets the same value as the total balance, and the annotation is added:
{
"c":[
{
"v":"Date(2013, 1, 26)"
},
{
"v":2000
},
{
"v":2000
},
{
"v":"Something!"
},
{
"v":"Something happened here!"
}
]
},
In your GChart's configuration, you can now set two colours. One for the normal line, and one for the "Ann".
colors: ['black','red']
If you have no annotations "touching", GCharts will not draw a line between them and the points will remain "invisible", while the annotations show up at exactly the right place.
Short answer: no, you can't change the text color through standard options (you could write something to find that text in the SVG and change its color with javascript, but that is beyond my level).
You can see an answer from ASGallant on Google Groups here, and his example here.
// code borrowed from Google visualization API playground, slightly modified here
google.load('visualization', '1', {packages: ['corechart']});
google.setOnLoadCallback(drawVisualization);
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'x');
data.addColumn({type: 'string', role: 'annotation'});
data.addColumn({type: 'string', role: 'annotationText'});
data.addColumn('number', 'Cats');
data.addColumn('number', 'Blanket 1');
data.addColumn('number', 'Blanket 2');
data.addRow(["A", null, null, 1, 1, 0.5]);
data.addRow(["B", null, null, 2, 0.5, 1]);
data.addRow(["C", null, null, 4, 1, 0.5]);
data.addRow(["D", null, null, 8, 0.5, 1]);
data.addRow(["E", 'foo', 'foo text', 7, 1, 0.5]);
data.addRow(["F", null, null, 7, 0.5, 1]);
data.addRow(["G", null, null, 8, 1, 0.5]);
data.addRow(["H", null, null, 4, 0.5, 1]);
data.addRow(["I", null, null, 2, 1, 0.5]);
data.addRow(["J", null, null, 3.5, 0.5, 1]);
data.addRow(["K", null, null, 3, 1, 0.5]);
data.addRow(["L", null, null, 3.5, 0.5, 1]);
data.addRow(["M", null, null, 1, 1, 0.5]);
data.addRow(["N", null, null, 1, 0.5, 1]);
// Create and draw the visualization.
var chart = new google.visualization.LineChart(document.getElementById('visualization'));
chart.draw(data, {
annotation: {
1: {
style: 'line'
}
},
curveType: "function",
width: 500,
height: 400,
vAxis: {
maxValue: 10
}
});
}
The best you can do is to change the style of the line, but it doesn't look like you can currently change the color of the line.
Has this been updated using the 'style' option where one could add a new column {"type":"string","role":"style"} and in each row we would have {"v":"point {size: 4; fill-color: #3366cc;}"}? This allows the annotation to have the same color as the point/marker (which could be changed for each point) but does not allow it to be bold. One example of the data to try would be,
var data =new google.visualization.DataTable(
{
"cols":[
{"label":"Log GDP Per-Capita ","type":"number"},
{"label":"New Chart",
"type":"number"},
{"type":"string","role":"annotation"},
{"type":"string","role":"style"}
],
"rows":[
{"c":[{"v":10.21932},{"v":12.3199676},{"v":"ABW"},{"v":"point {size: 4; fill-color: #3366cc;}"}]},
{"c":[{"v":10.68416},{"v":8.4347518},{"v":"ARE"},{"v":"point {size: 4; fill-color: #3366cc;}"}]},
{"c":[{"v":9.634226},{"v":12.0774068},{"v":"ATG"},{"v":"point {size: 4; fill-color: #3366cc;}"}]},
{"c":[{"v":10.83869},{"v":1.8545959},{"v":"AUS"},{"v":"point {size: 4; fill-color: #3366cc;}"}]},
{"c":[{"v":10.7687},{"v":7.4919999},{"v":"AUT"},{"v":"point {size: 4; fill-color: #3366cc;}"}]}
]
}
);