I am using the horizontal bar chart from chartjs. Right now my Chart seems to be very big, and the space between the ticks on the xAxis is very high. ( I attached picture of that), can anyone tell me how to reduce this space and scale the chart in total better?
My css properties:
#myChart {
width: 90% !important;
height: 100% !important;
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
padding-bottom: 5%;
}
My chart options:
modelChart = new Chart(ctx, {
type: 'horizontalBar',
data: data,
options: {
scales: {
yAxes: [{
ticks: {
suggestedMin: 0,
fontSize: 18
}
}],
xAxes: [{
ticks: {
autoSkip: false,
fontSize: 18,
beginAtZero: true
}
}]
},
legend: {
display: false
},
tooltips: {
footerFontSize: 22,
bodyFontSize: 22,
titleFontSize: 18
},
hover: {
animationDuration: 0
}
}
});
If you post your corresponding HTML then I can confirm this, but is #myChart the id of your canvas element or of a div that contains your canvas element?
Chart.js will render the chart such that it fully fills the parent of the canvas element. Even if you set a width property on a canvas element it will still not affect the chart size.
Checkout this codepen example that demonstrates the difference. At the top is a chart contained by a div whose width is set to 40%. At the bottom is the same chart but the canvas element's width is set to 40%. Notice that the second chart still fills the entire window.
So long story short, you should wrap your canvas element in a div and set the div's desired size accordingly to actually change the size of your chart.
Now, let me address your question about changing the space between ticks in your X axis. There is not really a way to truly do this like I think you are wanting to do, because chart.js determines the tick placement by dividing the width of the chart by the number of tick steps (e.g. it always uses the full width of the chart equally).
So one way to decrease the space between ticks is to simply add more ticks (by changing the tick stepSize using the stepSize and fixedStepSize properties). Obviously, in this case, the chart size has not changed. You are just showing more ticks, so the space between them has decreased.
If you want to truly change the distance between ticks, then the only way is to decrease the width of the chart. But by default, the height of the chart will decrease along with the width because the maintainAspectRatio property is defaulted to true.
So if you want a narrower chart (but still want the chart to be large) then I would advise you to set the maintainAspectRatio property to false and manually set the height and width of your chart's parent div.
Checkout this codepen that gives an example of each of the tick spacing concepts that I discussed.
The first chart is the baseline, the second chart adds more ticks (thus decreasing the tick spacing), and the third chart changes the aspect ratio so the chart is still large but narrower (therefore the distance between ticks is reduced).
Try using chartArea: {width: '30%'}. Adjust percentage as per requirement. It will compress the width of the chart. Just a thought !!!! I used in horizontal bar graphs to adjust my graph size.
Related
I have one dataset with multiple labels in my bar chart. When bar chart has more labels, width of label shrink for each.
I want to set fixed width for every window in my chart. For example dark stick for every label should be same fixed width size no matter how many window exists.
Thank in advance.
Is it a request to have the vertical axis have a fixed width?
There is a way to do this:
options: {
scales: {
yAxes: [{
afterFit: function(scaleInstance) {
scaleInstance.width = 100; // sets the width to 100px
}
}]
}
}
I have created a line chart in chart.js that plots data from financial markets.
How can I control the width of the gridlines from the x axis?
The data is time based and when the chart starts the space between the gridlines is too big.
As the data is added the chart condenses the space automatically.
I would like to control the spacing to a uniform amount that I can set from the start.
Any help much appreciated.
You can set a maximum number of vertical grid lines (for x axis) :
scales: {
xAxes: [{
ticks: {
maxTicksLimit: 20,
},
}]
},
Might not be the best solution but by setting a fix hight or width you can control the max-space between the gridLines
<canvas id="myChart" width="1200px"></canvas>
I am using Chart.js as my charting library. I have created horizontalBar chart.
I need to set the width of individual bar in the chart.
I did not found anything specific in chartjs documentation but while looking at source code I found the option barThickness which is setting the fixed bar width
But as number of rows increase, instead of increasing the height of the chart, the bar are colliding with each other. Please check fiddle for example:
https://jsfiddle.net/orhp0zLg/
Is there any way we can increase the height of the chart instead of letting the bars collide with each other?
The barThickness property is a fixed width, as you noticed in your issue.
However, you have an other property called barPercentage which is a multiplier of the max width of your bars.
You should set berPercentage to a value (let's say 0.95) and you'll always have the same format, no matter how many bars you have :
options: {
scales: {
yAxes: [{
barPercentage: 0.95,
}]
}
}
Here is your updated fiddle with the fix and here are the results with first 7 values and then 12 :
In Highcharts, I'd like to put the y-axis title at the top and have it left-aligned with the y-axis labels.
I've tried this:
$('#container').highcharts({
...
yAxis: {
...
title: {
align: 'high',
text: 'Y-axis title',
rotation: 0,
y: -10,
//To left-align title with labels
textAlign: 'left', //This is undocumented, but appears to work
margin: 0
}
}
})
However, I get an excessive left margin which seems to be proportional to the length of the y-axis title.
JsFiddle
It looks like the margin calculation doesn't take into account the textAlign: 'left' setting.
UPDATE: I should say that my current "solution" is to set a margin with chart.marginLeft but that's not ideal because it's fixed. The left margin should be just big enough to accommodate the axis labels (however big they might be).
How can I left-align the y-axis title with the labels and have a reasonable left margin?
I decided to use marginLeft (yes, you read that correctly), but based on the length of your axis label, to provide the needed flexibility.
What I did here is set your chart options to a variable called chartOptions. I then calculated the length (number of characters) of the axis title, set the marginLeft property based on that value, and then drew the chart with the amended chart options.
chartOptions.chart.marginLeft = chartOptions.yAxis.title.text.length;
var chart = $('#container').highcharts(chartOptions);
Here's the working fiddle: http://jsfiddle.net/brightmatrix/6eeuay58/9/
I tested it with different numbers by increasing some of your data points.
Please let me know if this is useful and helpful for you.
I have built some highcharts charts and I am displaying them one at a time
on mouseover.
The jquery creates a floating div (depending on the cursor) with a border line
1px solid black
and then the highchart method is being called to draw the chart.
The thing is that highcharts exceed the boundary and left and bottom border is not shown.
I tried 'margin' :
chart:
{
renderTo: 'graph',
defaultSeriesType: 'line',
zoomType: 'x',
margin: [ 10, 10, 10, 10]
},
and still it does the same thing.
You would need to set the margins to at least 70 in order for the highchart to display decently. Also, if you are using and you know the size of the div you may want to specify the height and width of the chart as well. I would make it slightly smaller than the div. Here is an example.