Adding a unit to y axis labels in plotly.js - plotly.js

I'd like to add a unit to the y-axis tick labels in plotly.js. How might I do this? Adding a ticktext and tickval property for yaxis layout doesn't seem to have the effect I thought, as it does with an xaxis.

As per your own comment, and per here
ticksuffix(string)
You can add this as part of the x or y axis option as part of the layout text for your plot.
e.g.
var layout = {
yaxis:
{
ticksuffix: "suffix"
}
};

Related

JavaFX Line Chart NumberAxis with strict upper bound, need padding of one tick like CategoryAxis does automatically

So I'm creating a Line Chart with an undetermined number of XYChart.Series'. The xAxis is a CategoryAxis and the yAxis is a NumberAxis. The problem I have is that I need to have an upper bound max of 100 on the yAxis as it represents %. When a series is plotted which hits the top 100, the circle point is clipped by the boundaries of the chart area. See the picture.
MyChart
The same thing does NOT happen with the xAxis natively it seems (because I didn't set an upper bound?) and I'd like to achieve the same effect where it looks like there is an extra tick of padding between the upper bound and the chart's edge, but without a tick label. Setting the upper bound on the yAxis to 105 makes it look like upper bound IS 105, which is not an acceptable workaround.
This is how I instantiate the axes:
this.xAxis = new CategoryAxis();
this.yAxis = new NumberAxis("Percent", 0.0, 100.0, 10.0);
The Line chart is built like so and then added to the parent node which is the center of a BorderLayout:
LineChart<String, Number> lineChart = new LineChart<>(this.xAxis, this.yAxis);
List<XYChart.Series<String, Number>> seriesList = null;
if (seriesMap.containsKey(this.unitNameForChart)) {
seriesList = seriesMap.get(this.unitNameForChart);
}
else {
seriesList = buildTimeStepSeries();
}
lineChart.getData().addAll(seriesList);
...
I've tried adding padding/insets directly to the LineChart and yAxis yet nothing worked out. I'm open for CSS or direct coding solutions.

Dynamically changing the number of ticks in D3

I try to dynamically change the number of ticks on an axis via an input field
// updated by an input field
var nNumberOfTicks;
function updatenumberofticks(nValue) { nNumberOfTicks = nValue; }
// definition of the axis
var xAxis = d3.svg.axis()
.orient('bottom')
.ticks(nNumberOfTicks)
.scale(xScale);
but it doesn't work. See here: https://jsfiddle.net/stefanooo/cn2xo56w/3/.
This example works perfectly when changing xmin. What do I have to change to make it work for the number of ticks also?
You need to give the updated number of ticks to the axis component after changing it, e.g.
d3.select("#numberofticks").on("change", function() {
updatenumberofticks(+this.value);
vis.select('.xaxis').transition().call(xAxis.ticks(+this.value));
});
Complete example here.

d3 autospace overlapping tick labels

Is there a way in d3 to not draw overlapping tick labels? For example, if I have a bar chart, but the bars are only 5 pixels wide and the labels are 10 pixels wide, I end up with a cluttered mess. I'm currently working on an implementation to only draw the labels when they do not overlap. I can't find any existing way to do that, but wasn't sure if anyone else had dealt with this problem.
There is no way of doing this automatically in D3. You can set the number of ticks or the tick values explicitly (see the documentation), but you'll have to figure out the respective numbers/values yourself. Another option would be to rotate the labels such that there is less chance of them overlapping.
Alternatively, like suggested in the other answer, you could try using a force layout to place the labels. To clarify, you would use the force layout on the labels only -- this is completely independent of the type of chart. I have done this in this example, which is slightly more relevant than the one linked in the other answer.
Note that if you go with the force layout solution, you don't have to animate the position of the labels. You could simply compute the force layout until it converges and then plot the labels.
I've had a similar problem with multiple (sub-)axis, where the last tick overlaps my vertical axis in some situations (depending on the screen width), so I've just wrote a little function that compares the position of the end of the text label with the position of the next axis. This code is very specific to my use case, but could adapted easily to your needs:
var $svg = $('#svg');
// get the last tick of each of my sub-axis
$('.tick-axis').find('.tick:last-of-type').each(function() {
// get position of the end of this text field
var endOfTextField = $(this).offset().left + $(this).find('text').width();
// get the next vertical axis
var $nextAxis = $('line[data-axis="' + $(this).closest('.tick-axis').attr('data-axis') + '"]');
// there is no axis on the very right, so just use the svg width
var positionOfAxis = ($nextAxis.length > 0) ? $nextAxis.offset().left : $svg.offset().left + $svg.width();
// hide the ugly ones!
if (endOfTextField > positionOfAxis) {
$(this).attr('class', 'tick hide');
}
});
The ticks with color: aqua are the hidden ones:

D3.js: Hide the last tick on an axis?

I am using D3.js to draw an axis with ticks. I would like to hide only the last tick on the y-axis.
Maybe a picture will make it clearer. This is what my axis looks like at the moment - I'd like to hide the "21" and its associated tick.
Here is my current code:
var yAxisScale = d3.svg.axis().orient("left");
yAxisScale.scale(y_position);
yAxisScale.ticks(20).tickFormat(function(d) { return d+1; });
var yAxis = vis.selectAll("g.y.axis").data([1]);
Is there a way I can hide only the last tick, regardless of how many ticks there are on the y-axis?
I tried adding this line, but it doesn't work, even though the selectAll expression appears to return the right element.
d3.select(d3.selectAll("g.y.axis g")[0].pop()).style('opacity', 1e-6);
The opacity is still set to 1.
you should to take a look at axis.tickSize(). it allows you to set the size of the major, minor, and end ticks.
also see here for similar question:
Remove end-ticks from D3.js axis

jqplot - x-axis

I have a long list of data for x-axis data when drawing a line chart (about 800 entries). The problem is it will not display correctly and overwrite each other. I am thinking a way to show (for example, every one hundred for a grid) and don't know how to do it. Please help me out.
Thanks.
You can specify an array of ticks to display on your chosen axis :
var xTicks = new Array(1,101,201,301,401,501,601,701,800);
--In your plot, add ticks option to your chosen axis :
axes: {
xaxis: {
ticks: xTicks --my ticks array
renderer: $.jqplot.CategoryAxisRenderer,
autoscale: false
}
}
It should do the trick.

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