We Keep Coding

Why would the label of the vertical axis only show after the button is clicked?

I am working on a website which needs to show something on the chart (highchart) upon clicking of a button.
The issue is: when the page is first loaded, the label on the vertical axis can not be seen, no matter how big I set the margin for the chart. However, after the button is clicked for the first time, the labels can be seen and remains so.
There was no such problem before I set "reversed", "opposite" for xAxis and "reversed" for yAxis as true.
What causes this phenomenon and how can I solve this?
See the JSFiddle for detail. (There are some logic mistakes in the code which is irrelevant for my question.)
I just discovered that when I first load the JSFiddle, the vertical axis of the graph shows up with label; but when I click on "Run" additionally, the graph is refreshed with a vertical axis without label. Maybe I can simulate certain process which takes place when a JSFiddle is loaded to make sure that the vertical axis of the graph shows up with labels. But I am not sure how to do that.
Browser: Google Chrome Version 69.0.3497.92 (Official Build) (64-bit) (up to date)
My OS: Windows 10
Code for the generation of the chart:
function createColumnHorizChart(argMinY = minYAxis, argMaxY = maxYAxis) {
var chart = new Highcharts.Chart({
chart: { //not to be changed lightly
renderTo: 'contr2',
type: 'bar',
width: 749,
marginTop: 5,
marginLeft: 1,
marginRight: 90,
marginBottom: 55
},
colors: [
'#0000ff'
],
title: {
text: null
},
exporting: {
enabled: false
},
legend: {
enabled: false
},
credits: {
enabled: false
},
xAxis: {
categories: ['smaller than 100', '100 - 110', '110 - 120', '120 - 130', '130 - 140', '140 - 150', 'bigger than 150'],
gridLineWidth: 1,
startOnTick: true,
title: {
text: 'Money Unit (MU)'
},
opposite: true,
reversed: true
},
yAxis: {
reversed: true,
min: 0,
max: 15,
tickInterval: 5,
title: {
text: 'Frequency',
}
},
tooltip: {
positioner: function(boxWidth, boxHeight, point) {
return {
x: point.plotX - 50,
y: point.plotY - 10
};
},
style: {
fontSize: "10px",
fontWeight: "unbold"
},
formatter: function() {
return Math.round(chartData[index - 2] * 100) / 100;
}
},
plotOptions: {
bar: {
dataLabels: {
enabled: false
}
},
series: {
borderColor: '#FFFFFF',
animation: false, //disable all the animations,
pointPadding: 0,
groupPadding: 0,
borderWidth: 1,
shadow: false
}
},
series: [{
enableMouseTracking: false,
data: Array(7).fill(0)
}]
});
return chart;
}

So, it's only possible to reproduce on Windows platform. Could you provide us also with minified demo where the problem occurs? I'm asking because in current demo there are a lot of lines which are unnecessary.
Additionally, until we find the source of the problem, you can workaround it by calling this.reflow() in chart.events.load event handler.
chart: {
events: {
load: function() {
this.reflow()
}
}
}
API Reference: https://api.highcharts.com/class-reference/Highcharts.Chart#reflow

I'm not sure why but it works fine when you remove the marginLeft property or set it to 0.

Drawing a small vertical line on top of chart using High charts by specifying end coordinates

I am new to High Charts for drawing charts. My requirement is to draw a small vertical line on top of already drawn chart by specifying end coordinates. I can easily draw one using the JqPlot plugin and the image is given below.
The options I have used in JqPlot is
canvasOverlay: {
show: true,
objects: [
{line: {
name: 'stack-overflow',
lineWidth: 6,
start: [8, 0.5],
stop:[8, 0.7],
color: 'rgb(100, 55, 124)',
shadow: false
}}
]
}
On some research I have found that I can use plotLines in High charts
Stackoverflow Post
I have tried this option but it draws a full length red vertical line and I don't see any option to restrict the length of the line.
The code I have used is given below
xAxis: {
min: 0,
max: 35,
tickInterval: 5,
title: {text: "Time"},
plotLines: [{
color: 'red',
width: 5,
value: 5.5
}]
}
UPDATE:
JSFiddle link is given below
JSFIddle
Am I missing something or do I need to try some other options

You could use the Highcharts renderer option
function (chart) {
var lineStartXposition2 = lineStartXposition + chart.plotLeft + 10,
lineStartYposition2 = lineStartYposition + chart.plotTop + 10,
lineEndXposition2 = lineEndXposition + chart.plotLeft + 10,
lineEndYposition2 = lineEndYposition + chart.plotTop + 10;
chart.renderer.path(['M', positionX, positionY, 'L', positionX, positionEnd])
.attr({
'stroke-width': 2,
stroke: 'red'
})
.add();
});
Update 3 : New fiddle using point coordinates and variables
Fiddle

I hope the following link will help you
chart.addSeries({
name: 'Line Marker Values',
type:'scatter',
marker: {
symbol:'hline',
lineWidth:2,
lineColor:'rgba(253,0,154,0.9)',
radius:12
},
data: [32,35,37,28,42,35,27]
});
click here

You can use appropriately configured scatter series for this.
var chart = Highcharts.chart('container', {
series: [{
data: [1, 3, 4, 5, 1]
}, {
tooltip: {
pointFormat: null // don't dispaly tooltip
},
states: {
hover: {
enabled: false
}
},
type: 'scatter', // points don't need to be sorted
lineWidth: 3,
marker: {
enabled: false
},
showInLegend: false,
data: [
[2, 3], [2, 5]
]
}]
});
Live demo: http://jsfiddle.net/kkulig/gab2ow7f/

How do I remove padding from both sides of Highcharts area category chart?

There's too much padding on either side of the area chart and minPadding/maxPadding doesn't work with categories.
I want the area chart to start and end without any padding.
My code is below:
http://jsfiddle.net/nx4xeb4k/1/
$('#container').highcharts({
chart: {
type: 'area',
inverted: false
},
title: {
text: 'Too Much Padding On Either Side'
},
plotOptions: {
series: {
fillOpacity: 0.1
}
},
xAxis: {
type: 'category'
},
yAxis: {
title: {
text: 'Data Point'
}
},
legend: {
enabled: false
},
tooltip: {
pointFormat: '<b>{point.y}</b> points'
},
series: [{
name: 'Visits',
data: [
["Monday", 58],
["Tuesday", 65],
["Wednesday", 55],
["Thursday", 44],
["Friday", 56],
["Saturday", 65],
["Sunday", 69]
],
dataLabels: {
enabled: false,
rotation: -90,
color: '#FFFFFF',
align: 'right',
format: '{point.y:.1f}',
y: 10,
style: {
fontSize: '14px',
fontFamily: 'Verdana, sans-serif'
}
}
}]
});

A colleague of mine solved this very situation for some of my charts. Their solution was to remove the type: 'category' from the x-axis (making it a linear type instead) and instead replace the axis labels from an array.
Here's what's been changed:
First, I added an array of your x-axis labels.
var categoryLabels = ["Monday","Tuesday","Wednesday","Thursday","Friday",
"Saturday","Sunday"];
Next, I updated your series values to hold only the y-axis values.
series: [{
name: 'Visits',
data: [58, 65, 55, 44, 56, 65, 69],
Then, for your x-axis, I included a formatter function to pull in the labels from the array as substitutes for the default linear values.
xAxis: {
labels: {
formatter: function(){
return categoryLabels[this.value];
}
}
},
Lastly, I updated the tooltip options to show the values from the labels array.
tooltip: {
formatter: function () {
return categoryLabels[this.x] + ': ' + Highcharts.numberFormat(this.y,0);
}
},
I updated your fiddle with this tweaks: http://jsfiddle.net/brightmatrix/nx4xeb4k/4/
I hope you'll find this solution as useful as I have!

According to API, the default value of highcharts.xAxis.tickmarkPlacement is between and this is why the point of each category drops between two ticks on xAxis in your chart.
By setting highcharts.xAxis.tickmarkPlacement to on and playing around the value of highcharts.xAxis.min and highcharts.xAxis.max like this, you should be able to achieve what you want.

You can declare the min / max values to fix the problem.
var categoryLabels = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"];
//....
xAxis: {
min: 0.49,
max: categoryLabels.length - 1.49,
categories: categoryLabels,
type: 'category'
},
Example:
http://jsfiddle.net/fo04m7k7/

HighCharts - Add vertical lines from a desire point

Need to draw vertical lines from a desired point rather than starting from 0.
plotLines: [{
color: '#FF0000',
width: 1,
value: 4
}, {
color: '#FF0000',
width: 1,
value: 7
}],
Here is the fiddler link: http://jsfiddle.net/bpswt3tr/4/
My requirement is to draw first vertical line from when y value is 110.2 and 2nd line from when y value is 135.6 instead of starting from zero. i.e above the plot line only. Please suggest how can I achieve this? Thanks.

Considering the documentation it is unlikely that HighCharts supports this by default, as you are only allowed to associate a value of the current axis with the line.
You might need a preprocessing step that inverts you function to get the appropriate X values. Something like:
invert(data, Y) -> list of X values with data[X] = Y

You can do this on the chart.events.load call. If you know these are the points you want to add marker elements to then it is fairly straightforward. You first get the current max label value for the yAxis. Then you add a series to the chart with the starting point being your series' value and the second point being the max viewable yAxis value. Then do the same for the second point you want to add a bar to. Then, you need to re-set the yAxis max value to the initial state because highcharts will try to increase the scale to accommodate the new points.
chart: {
events: {
load: function () {
var yMAx = this.yAxis[0].max;
console.log(yMAx);
this.addSeries({
data: [{
x: 4,
y: 110.2,
marker: {
symbol: 'triangle'
}
}, {
x: 4,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
}
});
this.addSeries({
data: [{
x: 7,
y: 135.6,
marker: {
symbol: 'triangle'
}
}, {
x: 7,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
}
});
this.yAxis[0].update({
max: yMAx
});
}
}
}
Sample demo.

set Pie chart labels exact in center of Slices of PIE highcharts

i am using highcharts in one of my project. Highcharts JQuery version is being used and below is the reference:
http://code.highcharts.com/highcharts.js
Code used to draw chart is as below:
$(function () {
var chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
type:'pie'
},
xAxis: {
categories: ['Jan', 'Feb', 'Mar', 'Apr']
},
plotOptions: {
series: {
dataLabels: {
enabled: true,
formatter: function() {
return Math.floor(this.percentage*100)/100 + ' %';
},
distance: 20,
connectorWidth : 0,
color: 'rgb(0, 127, 209)'
}
}
},
series: [{
data: [29.9, 71.5, 106.4, 129.2,29.9, 71.5, 106.4,
129.2,29.9, 71.5, 106.4, 129.2]
}]
});
});
The problem here i am facing that Slice labels are running here and there. I want all labels exact in center of each slice.
JS Fiddle link for demo is PIE Chart JSFiddle

Simplest, but not precise way would be to set negative distance for dataLabels. Value of distance would be related to size of chart, so it is possible to update series (with new distance for dataLabels) in load (to initiatie correct position) and redraw (after change of chart's size) events.
Precise solution for placing each of dataLabels in center of its slice can be based on getting center of slice and placing labels there. To keep chart responsive this adjustment of labels positions should be performed after each change of chart's size - in load and redraw events of chart.
Example: http://jsfiddle.net/mo8dfztx/2/
function redrawDatalabels() {
var chart = this,
cX = chart.series[0].center[0],
cY = chart.series[0].center[1],
shapeArgs, ang, posX, posY, bBox;
Highcharts.each(chart.series[0].data, function (point, i) {
if (point.dataLabel) {
bBox = point.dataLabel.getBBox();
shapeArgs = point.shapeArgs;
ang = (shapeArgs.end - shapeArgs.start) / 2 + shapeArgs.start;
posX = cX + (shapeArgs.r / 2) * Math.cos(ang);
posY = cY + (shapeArgs.r / 2) * Math.sin(ang);
point.dataLabel._pos.x = posX + ((point.labelPos[6] == "right" ? (1) : (-1)) * bBox.width/2);
point.dataLabel._pos.y = posY - bBox.height/2;
}
});
chart.series[0].placeDataLabels();
}
$(function () {
$('#container').highcharts({
chart: {
plotBackgroundColor: null,
plotBorderWidth: null,
plotShadow: false,
events: {
load: redrawDatalabels,
redraw: redrawDatalabels
}
},
title: {
text: 'Browser market shares at a specific website, 2014'
},
tooltip: {
pointFormat: '{series.name}: <b>{point.percentage:.1f}%</b>'
},
plotOptions: {
pie: {
allowPointSelect: true,
cursor: 'pointer',
dataLabels: {
enabled: true,
connectorWidth: 0,
format: '<b>{point.name}</b>: {point.percentage:.1f} %',
style: {
color: (Highcharts.theme && Highcharts.theme.contrastTextColor) || 'black'
}
}
}
},
series: [{
type: 'pie',
name: 'Browser share',
data: [
['Firefox', 50],
['IE', 50],
['Safari', 25],
['Opera', 25]
]
}]
});
});

It looks like that there's no build-in feature to do this.
I think you have to use a negative distance, and if the chart size changes, you have to calculate the new distance to keep the labels centered on the slice.
You could handle this in the load event. Here's a simple example what you could refine to fit your needs:
http://jsfiddle.net/uhydP/317/
events: {
load: function(e) {
this.options.plotOptions.series.dataLabels.distance = (this.chartHeight / 5.5) * -1;
this.series[0].update(this.options);
}
}