In graphs with a lot of datapoints the amount of ticks on the X-axis becomes so overwhelming that it's impossible to read. Is there a way to instruct ChartJS to not render each label element on the X-Axis but for instance only the first of each month?
I have tried using a category type instead of time and only filling in the labels for the first of the month but then there is also no label for when you hover over a certain datapoint which makes it impossible to determine what day it is, making it unfit for my requirements.
Related
I'm trying to build a box plot representing stats of a lot of data(x-time, y-time) The idea is to use d3.extent() to get the domain and then feed it to timeScale to get ticks in nicely chosen intervals. Then I calculate stats for data points between the ticks. Example below:
The approach works well most of the time. Except for the 1st day of the month which creates an additional tick in an uneven spacing ( see above "Wed 31, June" ). I'm currently calculating bar widths and positions manually assuming that the ticks are spaced evenly so the whole chart gets broken.
The data can span any range of time from a week to couple years, so dynamic ticks are required.
Any ideas how to remove the additional tick or make all the ticks spread evenly?
EDIT. Not sure if removing the tick is going to do the trick... probably even spacing is more important here. I looked up other people's questions about similar problems but I'm still confused how to solve my problem.
I've just started using D3 so forgive me if the question is trivial. I'll be happy if you just point me in the right direction.
I'm wondering whether there is some high level way of having more than one brush on a graph. Here's the problem:
I have a stacked bar chart where each bar represents one weekday and different metrics are stacked on top of one another (stacked line charts are not available yet as far as I know). Now I would like to let the user select the days to display (and the selection should propagate into the other graphs). Everything works great with the brush on, but if you want to choose Sunday, which is at the end of the graph, and Monday which is at the beginning, you can't do that using a single brush. Anybody knows of a way to add more brushes?
Alternatively I'm looking for a way to add a click event listener that would "activate" the day you click on in a similar way like a ring chart section would work.
Thanks a lot for your ideas,
Renra
You could try using an ordinal x axis instead of a linear one. The default behavior for ordinal bar charts is to click to select/deselect bars instead of range selection.
That's chart.x(d3.scale.ordinal()).xUnits(dc.units.ordinal). If you are using dc 1.7.1 of earlier, you may have to specify the domain by d3.scale.ordinal().domain([’Monday',...])
I try to create dynamic highcharts. I use series.addPoint. It works fine but my chart adds points and doesn't move like here - jsfiddle. It can be with 100 points on the screen.
How can I make only 10 points on the screen and hide old points?
http://api.highcharts.com/highcharts#Series
Series.addPoint()'s third argument is a boolean that enables shifting. If your series is not shifting, try setting the third parameter to true.
As for the second part, are you sure you want to "hide" old data? Generally old data should be shifted off the end in a real time graph (which I assume is what you're going for). If you have too many points, you can make your x-axis smaller via Axis.setExtremes(). http://api.highcharts.com/highcharts#Axis
I have a line chart that has months as the x-axis and displayed the values on mouse over.
There are a lot of months so when zoomed out fully the chart only has every third month with an average value of the months around that point.
Is it possible to change this so that it will display the exact value of the month displayed rather than an average as it is currently displayed different values when zoomed in to zoomed out.
You can see an example of this on http://www.highcharts.com/ on the USD to EUR chart where 2nd May 2011 displays different values depending on zoom level.
You need to disable datagrouping
I have tried using all sorts of combinations of tickInterval, tickPixelInterval label formatter and tickPositioner and I haven't been able to solve this issue.
I have a chart builder that pulls in different feeds and allows the user to modify the date range of those feeds before shooting this data into highcharts and spitting out the chart.
The problem is that some of the time, the first and/or last dates get cut off. Here is an example:
Without adjusting the margins of the chart (which causes the chart to take up less space), how do I prevent this from happening?
If I was able to determine the pixel location of the ticks and their labels, I could in theory, hide the specific ticks and their corresponding labels which were located outside the graph / cut off. Thoughts?
Without looking at your code - there are a few things you can do.
Rotate your labels
Play around with the x/y axis labels
Align them to the right
Hopefully one of these would help your cause.