I have a chart with ordering by date.
My problem is the chart lines joining false from start to end.
My options:
var options =
{
grid:
{
color: "#dedede",
borderWidth: 1,
borderColor: "transparent",
clickable: true,
hoverable: true
},
series: {
grow: {active:false},
lines: {
show: true,
fill: false,
lineWidth: 2,
steps: false
},
points: {
show:true,
radius: 5,
lineWidth: 3,
fill: true,
fillColor: "#000"
}
},
legend: { position: "nw", backgroundColor: null, backgroundOpacity: 0, noColumns: 2 },
yaxis: { tickSize:50 },
xaxis: {
mode: "time",
tickFormatter: function(val, axis) {
var d = new Date(val);
return d.getUTCDate() + "/" + (d.getUTCMonth() + 1);
}
},
colors: [],
shadowSize:1,
tooltip: true,
tooltipOpts: {
content: "%s : %y.0",
shifts: {
x: -30,
y: -50
},
defaultTheme: false
}
};
Note: I'm not re-ordering any data. Just giving the timestamp with this function:
function gd(year, month, day) {
return new Date(year, month - 1, day).getTime();
}
Setting the data like this:
$.each(e.data, function(i, e){
data.push([gd(parseInt(e['year']), parseInt(e['month']), parseInt(e['day'])), parseInt(e['value'])]);
});
var entity = {
label: e.campaign,
data: data,
lines: {fillColor: randomColor},
points: {fillColor: randomColor}
};
entities.push(entity);
Console log:
When creating line charts, flot will connect the data points using the order from the data series, ignoring the actual x-coordinates. That's why data series should be in ascending order.
A minimal example (using your data in ascending order):
var d1 = [
[1401310800000, 275],
[1401397200000, 270],
[1401483600000, 313],
[1401570000000, 279],
[1401656400000, 216],
[1401742800000, 255],
[1401829200000, 244],
[1401915600000, 70]
];
$.plot("#chart", [ d1 ]);
Here is a jsfiddle showing the chart.
Related
How can I move my labels on my x axes in between another x axes label. Nothing seems to work and I was unable to find anything on the docs. Is there a workaround? I'm using line chart time series.
https://www.chartjs.org/samples/latest/scales/time/financial.html
Currently, with the code I have its generating the figure below:
var cfg = {
elements:{
point: {
radius: 4
}
},
data: {
datasets: [
{
label: 'vsy',
backgroundColor: color(window.chartColors.red).alpha(0.5).rgbString(),
borderColor: window.chartColors.red,
data: firstData,
type: 'line',
pointRadius: 2,
fill: false,
lineTension: 0,
borderWidth: 2
},
{
label: 'de vsy',
backgroundColor: color(window.chartColors.blue).alpha(0.5).rgbString(),
borderColor: window.chartColors.blue,
data: dataMaker(15),
type: 'line',
pointRadius: 2,
fill: false,
lineTension: 0,
borderWidth: 2
}
],
},
options: {
animation: {
duration: 0
},
scales: {
xAxes: [{
type: 'time',
distribution: 'series',
offset: true,
time: {
unit: 'month',
displayFormats: {
month: 'MMM'
}
},
ticks: {
autoSkip: true,
autoSkipPadding: 75,
sampleSize: 100
},
}],
yAxes: [{
gridLines: {
drawBorder: false
}
}]
},
tooltips: {
intersect: false,
mode: 'index',
}
}
};
This is what I have now:
I want the labels on the x-axis to be on center instead of below the y axis grid line.
Thanks to uminder, with his comment it solves the issue but now I have a conflicting tooltip which lie on a same grid. When I hover to april line first point it shows me mar 30 which lies just above it and vice versa.
I fixed it by changing the mode to nearest but why is it activating the another point?
The option you're looking for is offsetGridLines.
If true, grid lines will be shifted to be between labels.
xAxes: [{
...
gridLines: {
offsetGridLines: true
}
In most cases, this produces the expected result. Unfortunately it doesn't work for time axes as documented in Chart.js issue #403. Thanks to Antti Hukkanen, there exists a workaround.
Please have a look at below runnable code snippet to see how it works.
function generateData() {
var unit = 'day';
function randomNumber(min, max) {
return Math.random() * (max - min) + min;
}
function randomPoint(date, lastClose) {
var open = randomNumber(lastClose * 0.95, lastClose * 1.05).toFixed(2);
var close = randomNumber(open * 0.95, open * 1.05).toFixed(2);
return {
t: date.valueOf(),
y: close
};
}
var date = moment().subtract(1, 'years');
var now = moment();
var data = [];
for (; data.length < 600 && date.isBefore(now); date = date.clone().add(1, unit).startOf(unit)) {
data.push(randomPoint(date, data.length > 0 ? data[data.length - 1].y : 30));
}
return data;
}
var TimeCenterScale = Chart.scaleService.getScaleConstructor('time').extend({
getPixelForTick: function(index) {
var ticks = this.getTicks();
if (index < 0 || index >= ticks.length) {
return null;
}
// Get the pixel value for the current tick.
var px = this.getPixelForOffset(ticks[index].value);
// Get the next tick's pixel value.
var nextPx = this.right;
var nextTick = ticks[index + 1];
if (nextTick) {
nextPx = this.getPixelForOffset(nextTick.value);
}
// Align the labels in the middle of the current and next tick.
return px + (nextPx - px) / 2;
},
});
// Register the scale type
var defaults = Chart.scaleService.getScaleDefaults('time');
Chart.scaleService.registerScaleType('timecenter', TimeCenterScale, defaults);
var cfg = {
data: {
datasets: [{
label: 'CHRT - Chart.js Corporation',
backgroundColor: 'red',
borderColor: 'red',
data: generateData(),
type: 'line',
pointRadius: 0,
fill: false,
lineTension: 0,
borderWidth: 2
}]
},
options: {
animation: {
duration: 0
},
scales: {
xAxes: [{
type: 'timecenter',
time: {
unit: 'month',
stepSize: 1,
displayFormats: {
month: 'MMM'
}
},
gridLines: {
offsetGridLines: true
}
}],
yAxes: [{
gridLines: {
drawBorder: false
}
}]
},
tooltips: {
intersect: false,
mode: 'index'
}
}
};
var chart = new Chart('chart1', cfg);
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js"></script>
<canvas id="chart1" height="90"></canvas>
For chartJs v3 you can use offset property:
scales: {
x: {
grid: {
offset: true
}
},
...
}
I'm having trouble on reload chart with updated details, I'm showing graph based on user activity on daily basis, on initial load with preset values the graph is formed precisely
Here I'm using flot chart library, in that flot chart library I'm using line graph
This is initial graph
But when I use custom values instead of loading a new graph with updated values, the custom values is get appended to the right end of x-axis on the graph.
When I use the custom values, the graph looks like,
In second graph, the included data will added to its old data at right side instead of showing it in correct order
here is my code for first graph, input data in vm.allsessionReport
input data will get by programmatic
vm.allSessionReport = [];
vm.sessionData = [{
"color": "#7dc7df",
"data": vm.allSessionReport
}];
vm.allSessionReport = [
["2017-06-30", 0],
["2017-07-01", 0],
["2017-07-02", 0],
["2017-07-03", 0],
["2017-07-04", 17],
["2017-07-05", 0],
["2017-07-06", 0],
["2017-07-07", 0]
]
vm.sessionData = [{
"color": "#7dc7df",
"data": vm.allSessionReport
}];
console.log('session data 2nd', vm.sessionData)
vm.sessionOptions = {
series: {
lines: {
show: true,
fill: 0.01
},
points: {
show: true,
radius: 4
}
},
grid: {
borderColor: '#eee',
borderWidth: 1,
hoverable: true,
backgroundColor: '#fcfcfc'
},
tooltip: true,
tooltipOpts: {
content: function (label, x, y) { return x + ' : ' + y; }
},
xaxis: {
position: ($scope.app.layout.isRTL ? 'top' : 'bottom'),
tickColor: '#eee',
mode: 'categories'
},
yaxis: {
position: ($scope.app.layout.isRTL ? 'right' : 'left'),
tickColor: '#eee'
},
shadowSize: 0
};
code for my second graph, input data has changed to
vm.allSessionReport = [];
vm.sessionData = [{
"color": "#7dc7df",
"data": vm.allSessionReport
}];
vm.allSessionReport = [
["2017-06-28", 0],
["2017-06-29", 0],
["2017-06-30", 0],
["2017-07-01", 0],
["2017-07-02", 0],
["2017-07-03", 0],
["2017-07-04", 17],
["2017-07-05", 0],
["2017-07-06", 0],
["2017-07-07", 0]
]
vm.sessionData = [{
"color": "#7dc7df",
"data": vm.allSessionReport
}];
console.log('session data 2nd', vm.sessionData)
vm.sessionOptions = {
series: {
lines: {
show: true,
fill: 0.01
},
points: {
show: true,
radius: 4
}
},
grid: {
borderColor: '#eee',
borderWidth: 1,
hoverable: true,
backgroundColor: '#fcfcfc'
},
tooltip: true,
tooltipOpts: {
content: function (label, x, y) { return x + ' : ' + y; }
},
xaxis: {
position: ($scope.app.layout.isRTL ? 'top' : 'bottom'),
tickColor: '#eee',
mode: 'categories'
},
yaxis: {
position: ($scope.app.layout.isRTL ? 'right' : 'left'),
tickColor: '#eee'
},
shadowSize: 0
};
I have a similar problem like posted on highchart chart redraw method is not refreshing the chart but I am working with polar chart, so the solution given there is not solving my issue.
So, the code below is showing the highchart correctly, but doesn't refreshing data. Now I'm asking for advice/help how to solve it.
$(function() {
$.getJSON('wind_graph.php?callback=?', function(dataWind) {
var direction = Wind_direction;
var polarOptions = {
chart: {
polar: true,
events : {
load : function () {
setInterval(function(){
RefreshDataWind();
}, 1000);
}
}
},
title: {
text: 'Wind Direction'
},
pane: {
startAngle: 0,
},
tooltip: {
enabled: false
},
legend: {
enabled: false
},
// the value axis
xAxis: {
tickInterval: 15,
min: 0,
max: 360,
labels: {
formatter: function() {
return this.value + '°';
}
}
},
plotOptions: {
series: {
pointStart: 0,
pointInterval: 30,
marker: {
enabled: false
},
},
}
};
// The polar chart
$('#graph-1').highcharts(Highcharts.merge(polarOptions, {
yAxis: {
tickInterval: 5,
min: 0,
max: 25,
visible: false
},
credits: {
enabled: false
},
series: [{
type: 'line',
name: 'Direction',
data: [
[0, 0],
[direction, 20]
],
lineColor: '#7cb5ec',
enableMouseTracking: false,
visible: true,
lineWidth: 2,
zIndex: 8,
}
]
}));
function RefreshDataWind()
{
var chart = $('#graph-1').highcharts();
$.getJSON('wind_graph.php?callback=?', function(dataWind)
{
var direction = Wind_direction;
chart.redraw();
});
chart.redraw();
}
});
});
To be more precise: if given Wind_direction value is equal to 0 (zero), then I need to display on chart the following "spline":
{
type: 'spline',
name: 'CentralCicrleCalmWind1',
data: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2],
pointInterval: 30,
pointStart: 0,
lineColor: windLineColor,
enableMouseTracking: false,
lineWidth: windLineWidth,
visible: showCentralCicrleCalmWind,
}, {
type: 'spline',
name: 'CentralCicrleCalmWind2',
data: [2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5],
pointInterval: 30,
pointStart: 0,
lineColor: windLineColor,
enableMouseTracking: false,
lineWidth: windLineWidth,
visible: showCentralCicrleCalmWind,
}
So as You can see, I have additional parameters like "showCentralCircleCalmWind" set to TRUE or FALSE depends on the given "Wind_direction" value and logic for this I have prepared at top of my code (not pasted here).
The thing what I need is:
Read value of variable in given JSON
Set variable "direction" at the begining of javascript code
Display the chart using higcharts library
Read the new value from JSON
Change the variable "direction" to the new value.
Display the new chart for a given value
Back to the point number 4...
Your problem may be helped by using the setData() function (see http://api.highcharts.com/highcharts/Series.setData).
In your example, I'd suggest the following:
function RefreshDataWind()
{
var chart = $('#graph-1').highcharts();
$.getJSON('wind_graph.php?callback=?', function(dataWind)
{
var direction = Wind_direction;
chart.series[0].setData(direction);
/* assuming "direction" to be an array like [1, 2, 3] */
});
}
The following Highcharts demo shows you how this works: http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/members/series-setdata/
Depending on the format of your "Wind_direction" variable, you may need to have a statement before setData() that explicitly makes it an array, since that's what the function is expecting.
I'd also suggest you remove the second instance of chart.redraw(), as the setData() makes that unnecessary.
I hope this is helpful for you!
Thanks in advance for your time.
I have the following code for a Flot Chart
<script src="js/plugins/flot/jquery.flot.js"></script>
<script src="js/plugins/flot/jquery.flot.tooltip.min.js"></script>
<script src="js/plugins/flot/jquery.flot.spline.js"></script>
<script src="js/plugins/flot/jquery.flot.resize.js"></script>
<script src="js/plugins/flot/jquery.flot.categories.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(function() {
var data = [{
"label": "Commission",
"color": "#1ab394",
"data": [["Oct", ],["Nov", ],["Dec", ],["Jan", ],["Feb", ],["Mar", ],["Apr", ],["May", 14],["Jun", 0],["Jul", 5],["Aug", 12],["Sep", 7]]
}, {
"label": "EPL",
"color": "#1C84C6",
"data": [["Oct", 0],["Nov", 0],["Dec", 0],["Jan", 0],["Feb", 0],["Mar", 0],["Apr", 0],["May", 1.75],["Jun", 0.00],["Jul", 0.17],["Aug", 0.39],["Sep", 0.35]]
}];
var options = {
series: {
lines: {
show: false,
fill: true
},
splines: {
show: true,
tension: 0.4,
lineWidth: 1,
fill: 0.4
},
points: {
radius: 0,
show: true
},
shadowSize: 2
},
grid: {
borderColor: '#eee',
borderWidth: 1,
hoverable: true,
backgroundColor: '#fff'
},
tooltip: true,
tooltipOpts: {
content: function (label, x, y) { return x + ' : ' + y; }
},
xaxis: {
tickColor: '#eee',
mode: 'categories'
},
yaxis: {
tickColor: '#eee'
},
shadowSize: 0
};
var chart = $('.dashchart');
if(chart.length)
$.plot(chart, data, options);
});
})(window, document, window.jQuery);
</script>
The docs state...
By default, the labels are ordered as they are met in the data series.
If you need a different ordering, you can specify "categories" on the
axis options and list the categories there:
https://code.google.com/p/flot/source/browse/trunk/jquery.flot.categories.js?r=341
However the x axis ordering is not the same as the data series, as seen in the screenshot below
Any idea why this may be.
I figured this out. Hope it helps someone some day
Seems Flot doesnt like empty values in the data series
"data": [["Oct", ],["Nov", ],["Dec", ],["Jan", ],["Feb", ],["Mar", ],["Apr", ],["May", 14],["Jun", 0],["Jul", 5],["Aug", 12],["Sep", 7]]
changed to this and it works fine
"data": [["Oct", 0],["Nov", 0],["Dec", 0],["Jan", 0],["Feb", 0],["Mar", ]0,["Apr", 0],["May", 14],["Jun", 0],["Jul", 5],["Aug", 12],["Sep", 7]]
I'm trying to display a flot chart with 3 arrays. To make things simple the arrays are all the same:
[[1,1],[2,3],[3,6],[4,10],[5,15],[6,21]]
I create the arrays with the following ruby code:
def flot_chart_series
total=0
foo=[]
(1..6).each do |number|
foo.push [number, total+=number]
end
foo
end
Here is my Erb processed Javascript code:
var fb_shares = <%= flot_chart_series %>;
var twitter_shares = <%= flot_chart_series %>;
var email_shares = <%= flot_chart_series %>;
var plot = $.plot($("#statsChart"),
[ { data: fb_shares, label: "Facebook shares"},
{ data: twitter_shares, label: "Twitter shares" },
{ data: email_shares, label: "Email shares" }], {
series: {
lines: { show: true,
lineWidth: 1,
fill: true,
fillColor: { colors: [ { opacity: 0.1 }, { opacity: 0.13 }, { opacity: 0.15 } ] }
},
points: { show: true,
lineWidth: 2,
radius: 3
},
shadowSize: 0,
stack: true
},
grid: { hoverable: true,
clickable: true,
tickColor: "#f9f9f9",
borderWidth: 0
},
legend: {
// show: false
labelBoxBorderColor: "#fff"
},
colors: ["#3071eb", "#30a0eb", "#a7b5c5"],
xaxis: {
ticks: [[1, "JAN"], [2, "FEB"], [3, "MAR"], [4,"APR"], [5,"MAY"], [6,"JUN"],
[7,"JUL"], [8,"AUG"], [9,"SEP"], [10,"OCT"], [11,"NOV"], [12,"DEC"]],
font: {
size: 12,
family: "Open Sans, Arial",
variant: "small-caps",
color: "#697695"
}
},
yaxis: {
ticks:3,
tickDecimals: 0,
font: {size:12, color: "#9da3a9"}
}
});
The problem is that the chart doesnt plot 3 of the same lines, it creates lines that are increasing in value. Here is a screen shot of the graph: flot chart screen shot
Any ideas what I'm doing wrong?
As #captain hints at in his comment this is because you are using the stacking plugin with stack: true. This is going to stack the 3 identical lines on top of each other.
Compare these fiddles: stack true and stack false.
If you don't want to stack just get rid of the plugin (less javascript == faster loading) and the stack: true option.