In AMCharts version 3, there is a demo showing how to highlight a particular column.
Is this possible using AMCharts version 4? For example, in the Simple Column demo, highlight the UK column based on its value (ie, where country = 'UK').
I tried modifying the example at https://stackoverflow.com/a/54358490/906814 but I can't get a handle on the columns in order to assess their values and then apply the active state highlight (JSFiddle).
// copied from https://stackoverflow.com/a/54358490/906814 but not working yet
var activeState = series.columns.template.states.create("active");
activeState.properties.fill = am4core.color("#E94F37");
series.columns.each(function(column) {
alert("column") // no alert is seen
column.setState("active");
column.isActive = true;
})
There are two approaches you can take.
1) Use an adapter on the column's fill and stroke and check the column value before modifying the color, e.g.
series.columns.template.adapter.add('fill', function(fill, target) {
if (target.dataItem && target.dataItem.categoryX == "UK") {
return "#ff0000";
}
return fill;
});
series.columns.template.adapter.add('stroke', function(stroke, target) {
if (target.dataItem && target.dataItem.categoryX == "UK") {
return "#ff0000";
}
return stroke;
})
Demo
2) Use a property field and set the stroke and fill from your data:
chart.data = [
// ...
{
"country": "UK",
"value": 1122,
"color": "#ff0000"
},
// ...
];
// ...
series.columns.template.propertyFields.fill = "color";
series.columns.template.propertyFields.stroke = "color";
Demo
The code I need is here:
chart.js bar chart color change based on value
Dola changes the color of the bars based on the values of the datasets using myObjBar.datasets[0].bars
I want to do the same thing but with the labels values (good, average, bad) e.g.
var barChartData = {
labels: ["good", "average", "bad"],
datasets: [
{
data: [1, 3, 10]
}
]
};
var ctx = document.getElementById("mycanvas").getContext("2d");
window.myObjBar = new Chart(ctx).Bar(barChartData, {
responsive : true
});
var bars = myObjBar.labels[0]; //I need this line
for(i=0;i<bars.length;i++){
var color="green";
if(bars[i].value=="bad"){
color="red";
}
else if(bars[i].value=="average"){
color="orange"
}
else{
color="green"
}
bars[i].fillColor = color;
}
myObjBar.update();
Instead of using bars[i].value property, you can use bars[i].label which gives you the label of the xAxe.
So in your loop, change to this :
for(i=0;i<bars.length;i++){
var color="green";
if(bars[i].label == "bad"){
color="red";
}
else if(bars[i].label == "average"){
color="orange"
}
else{
color="green"
}
bars[i].fillColor = color;
}
You can find the full code in this jsFiddle and here is its result :
I have my chart working ok, however I would like to use a custom step for my vertical y-axis. At the moment it seems to be automatic and is spaced out as below:
1,500,000
3,000,000
4,500,000
I would prefer it to be:
100,000
200,000
300,000
and so on...
Is there any way I can set this, I have looked through all the documentation but can't figure it out.
Here is my code:
var chart = new google.visualization.LineChart(document.getElementById('chart'));
chart.draw(chartData, { width: 1600, height: 900, title: 'Company Performance',
yAxis: { gridlineColor: '#ff0000' },
xAxis: { gridlineColor: '#ff0000' }
}
);
My data is company profit for each week of the year, y-axis is profit, x-axis is the week number.
Hope somebody can help.
Paul
this is how I do it:
var options = {
vAxis: { // same thing for horisontal, just use hAxis
viewWindow: { // what range will be visible
max: 120,
min: 0
},
gridlines: {
count: 12 // how many gridlines. You can set not the step, but total count of gridlines.
}
}
};
all the best ;)
For as far as I know this cannot be done automatically with Google Charts settings.
I've written a javascript function to do this.
To use it you can create a nice sequence that can be used as ticks for the vertical axis:
var prettyTicks = getChartTicks(0, chartData.getColumnRange(1).max);
The line for the xAxis should be changed to apply the ticks:
yAxis: { gridlineColor: '#ff0000', ticks: prettyTicks },
Here is the javascript method to create the ticks. It will create a tick for each value of 10 and if that creates too many ticks then it will do this for each 100 or 1000 etc.
// Creates an array of values that can be used for the tick property of the Google Charts vAxis
// The values provide a nice scale to have a clean view.
var getChartTicks = function (min, max) {
// settings
var maxTicks = 8;
var tickSize = 10;
// determine the range of the values and the number of ticks
var newMin;
var newMax;
var nrOfTicks;
var appliedTickSize = 1;
while (newMin == null || nrOfTicks > maxTicks) {
appliedTickSize *= tickSize;
newMin = Math.floor(min / appliedTickSize) * appliedTickSize;
newMax = Math.ceil(max / appliedTickSize) * appliedTickSize;
nrOfTicks = (newMax - newMin) / appliedTickSize;
}
// generate the tick values which will be applied to the axis
var ticks = new Array();
var i = 0;
for (var v = newMin; v <= newMax; v += appliedTickSize) {
ticks[i++] = v;
}
return ticks;
}
So to summarize, after adding this method your code could then be changed to:
var prettyTicks = getChartTicks(0, chartData.getColumnRange(1).max);
var chart = new google.visualization.LineChart(document.getElementById('chart'));
chart.draw(chartData, { width: 1600, height: 900, title: 'Company Performance',
yAxis: { gridlineColor: '#ff0000', ticks: prettyTicks },
xAxis: { gridlineColor: '#ff0000' }
}
);
Hi Please refer google chart api.There are several parameters available according to your requirement like
chbh = Bar width and spacing ...
chco = Series colors ...
chd = Chart data string...
chdl,chdlp, chdls=Chart legend text and style...
chds Scale for text format with custom range...
chem = Dynamic icon markers...
for more information
http://code.google.com/apis/chart/image/docs/chart_params.html
I was wondering how I can make a simple bar chart that perhaps has day as the x-axis, with values 'today' and 'yesterday', and the y-axis as perhaps 'time' with corresponding values '1' and '2'. I guess I'm confused as to how to set text as the values for the x-axis, how to show the y axis, and what exactly r.g.axis does...
(I found an example using axis = r.g.axis(0,300,400,0,500,8,2) and I only know it's the xpos, ypos,width, ??, ?? num ticks, ??). Any insight would be great! Or a page with more fully featured bar chart examples (labels, etc). Thanks.
For the sake of all those googling this:
r.g.axis(x_start, y_start, x_width, from, to, steps, orientation, labels, type, dashsize)
x_start and y_start: distance of the axis text from the bottom left corner
x_width: position of the end of the text along the x axis
from and to: used to specify and range to use instead of using the labels argument
steps: is the number of ticks - 1
orientation: seems to specify x-axis vs. y-axis
type: is the type of tick mark used.
This was all deduced from the source code. I think I'll be switching to a charting library with documentation now...
The current code (Raphaeljs 2.0) has changed and has to be slightly adapted to use Raphael.g.axis instead of r.g.axis:
Raphael.g.axis(85,230,310,null,null,4,2,["Today", "Yesterday",
"Tomorrow", "Future"], "|", 0, r)
You're on the right track. You use g.axis and the positional arguments for setting the text is found in the 'text' arg (positional) and for toggling the y using the 'orientation' args. I added an example here,
Barchart with text x-axis
Reading this Q&A and a dozen like it, I still could not get gRaphaël to show proper labels for a bar chart. The recipes all seemed to refer to older versions of the library, or to github pages that are no longer there. gRaphaël produces some great looking output--but its docs leave much to be desired.
I was, however, able to use a combination of Firebug and Inspect This Element to follow the code and see what it produced. Diving into the barchart object, the required geometry is right there. To save others the frustration, here's how I solved the problem:
<script>
function labelBarChart(r, bc, labels, attrs) {
// Label a bar chart bc that is part of a Raphael object r
// Labels is an array of strings. Attrs is a dictionary
// that provides attributes such as fill (text color)
// and font (text font, font-size, font-weight, etc) for the
// label text.
for (var i = 0; i<bc.bars.length; i++) {
var bar = bc.bars[i];
var gutter_y = bar.w * 0.4;
var label_x = bar.x
var label_y = bar.y + bar.h + gutter_y;
var label_text = labels[i];
var label_attr = { fill: "#2f69bf", font: "16px sans-serif" };
r.text(label_x, label_y, label_text).attr(label_attr);
}
}
// what follows is just setting up a bar chart and calling for labels
// to be applied
window.onload = function () {
var r = Raphael("holder"),
data3 = [25, 20, 13, 32, 15, 5, 6, 10],
txtattr = { font: "24px 'Allerta Stencil', sans-serif", fill: "rgb(105, 136, 39)"};
r.text(250, 10, "A Gratuitous Chart").attr(txtattr);
var bc = r.barchart(10, 10, 500, 400, data3, {
stacked: false,
type: "soft"});
bc.attr({fill: "#2f69bf"});
var x = 1;
labelBarChart(r, bc,
['abc','b','card','d','elph','fun','gurr','ha'],
{ fill: "#2f69bf", font: "16px sans-serif" }
);
};
</script>
<div id="holder"></div>
There are a bunch of little cleanups you could do to labelBarChart(), but this basically gets the job done.
Here's a function I wrote for adding the labels. It's not particularly elegant but it will add the labels:
Raphael.fn.labelBarChart = function(x_start, y_start, width, labels, textAttr) {
var paper = this;
// offset width and x_start for bar chart gutters
x_start += 10;
width -= 20;
var labelWidth = width / labels.length;
// offset x_start to center under each column
x_start += labelWidth / 2;
for ( var i = 0, len = labels.length; i < len; i++ ) {
paper.text( x_start + ( i * labelWidth ), y_start, labels[i] ).attr( textAttr );
}
};
Usage is as follows:
var paper = Raphael(0, 0, 600, 400);
var chart = paper.barchart(0, 0, 600, 380, [[63, 86, 26, 15, 36, 62, 18, 78]]);
var labels = ['Col 1', 'Col 2', 'Col 3', 'Col 4', 'Col 5', 'Col 6', 'Col 7', 'Col 8'];
paper.labelBarChart(0, 390, 600, labels, {'font-size': 14});
I would like to propose a solution of an issue of the labelBarChart function proposed by Jonathan Eunice.
considering stacked bar-graphes (or other bar-graphes with more than one array of values), I added a test on bc.bars[0] in case the bc.bars.length means the number of arrays of values stacked.
This lead to the code :
<script>
function labelBarChart(r, bc, labels, attrs) {
// Label a bar chart bc that is part of a Raphael object r
// Labels is an array of strings. Attrs is a dictionary
// that provides attributes such as fill (text color)
// and font (text font, font-size, font-weight, etc) for the
// label text.
//Added test : replace bc.bars by generic variable barsRef
var barsRef = (typeof bc.bars[0].length === 'undefined') ? bc.bars : bc.bars[0];
var bar, gutter_y, label_x, label_y, label_text;
//Added consideration of set attrs (if set)
var label_attr = (typeof attrs === 'undefined') ? {} : attrs;
label_attr['fill'] = (typeof label_attr['fill'] === 'undefined') ? "#2f69bf" : label_attr['fill'];
label_attr['font'] = (typeof label_attr['font'] === 'undefined') ? "16px sans-serif" : label_attr['font'];
for (var i = 0; i<barsRef.length; i++) {
bar = barsRef[i];
gutter_y = bar.w * 0.4;
label_x = bar.x
label_y = bar.y + bar.h + gutter_y;
label_text = labels[i];
r.text(label_x, label_y, label_text).attr(label_attr);
}
}
// what follows is just setting up a bar chart and calling for labels
// to be applied
// I added an array of data to illustrate : data4
window.onload = function () {
var r = Raphael("holder"),
data3 = [25, 20, 13, 32, 15, 5, 6, 10],
data4 = [0, 2, 1, 40, 1, 65, 46, 11],
txtattr = { font: "24px 'Allerta Stencil', sans-serif", fill: "rgb(105, 136, 39)"};
r.text(250, 10, "A Gratuitous Chart").attr(txtattr);
var bc = r.barchart(10, 10, 500, 400, [data3, data4] {
stacked: true,
type: "soft"});
bc.attr({fill: "#2f69bf"});
labelBarChart(r, bc,
['abc','b','card','d','elph','fun','gurr','ha'],
{ fill: "#2f69bf", font: "16px sans-serif" }
);
};
</script>
<div id="holder"></div>
I just tested it with 2 arrays of values stacked.