I am using highcharts to render my graphics in my web-based user interface. I am a novice programmer. I am receiving help from a number of folks. But, they and I cannot seem to remove the underscores from the x axis data values. I have searched the highcharts forum and see no mention of it there (I may have missed it). I am certain it is one of the options, but I cannot find it.
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I am using Highcharts to make a lot of several different types of graphs. I want to break the the line when there is a data gap. I am using sensor generated data so adding null is not an option. Because the site uses several different graph types I want to stick with Highcharts for all the graphs, but am looking for the gapsize feature that is available in Highstock.
It there a way to get the gapsize or similar feature to work with Highchart NOT Highstock?
Thanks
As you seem to already know, inserting null will accomplish this. Why is it not an option? Even if you don't control the server returning the data, you can still manipulate it before passing it to Highcharts.
Another option is you could create another series in the chart, but this is more complex than inserting null. Either option requires the data to be manually manipulated.
If you still think inserting null is not an option, post some code and also detail how you will know where the break should happen.
Does it happen that no one ever needs histogram in Delphi ?
Google gave me a bunch of half-baked code snippets. But it means that each time you need one - you have to invent one more ad hoc bycicle.
Torry mostly told me about some very expensive closed source Math Statistics or Financial packages, that as a subproduct have histograms. But they are very expensive and since you have no source code, each time you install update onto IDE/RTL/VCL you're probably screwed, until the vendor would make (soon ? ever?) updated packages. Given thatvendor is still does exists.
S.O. told me nothing, nil.
For what i found...
Mitov.com provides some histograms in PlotLab. which told to be free for non-commercial. Alas, it is again closed-source, and if the Histogram - quite fancy let's admit -is the onlything i need from it - why pay the whole price ?
One more example http://DSpatial.sf.net
Just few years ago i used it in Delphi 5, but even then i felt the author is loosing interest in the project. I made few enhancement, fixed some bugs, he merged them and that's all. The component was not very useful and lacked upon features, yet better than nothing. Now the project seems to be completely dead. Good old days, etc. But i do not want them back :-)
And Stack Overflow seemingly carries no single question about it. But maybe just no one bothered to create topic, after search found nothing ? I mean, Delphi was created for database access, histograms are one of basic ways to visualize data, and no one crosses them ? Something with nice style, with rich mouse tooltip like in HTML/CSS/JS on http://www.moskva.fm/stations/FM_95.2 ?
Or is this too domain-related and not ever possible to have good abstraction ?
TChart is a control that ships with most versions of Delphi. TChart can be used to make histograms (bar charts) in style. The following give you some ideas about how to use it: http://www.digitalcoding.com/tutorials/delphi/Simple-steps-to-create-Delphi-chart.html and http://delphi.about.com/od/adptips2006/qt/chart_selectbar.htm .
If you need something with code, google the pages at delphiforfun.org/programs/oscilloscope.htm . These are not controls. The oscilloscope article has a histogram with source. Some of the other projects at the site have other histogram graphs with source..not elegant but useful and free. Use them as a template to make your own control.
The link at http://delphiforfun.org/programs/Math_Topics/probability_distributions.htm shows how to make your own statistics displays with "histograms." This example makes use of TChart.
Here is some more stuff to try I found looking at my resource file:
http://wiki.lazarus.freepascal.org/TAChart, http://members.home.nl/mvanwesten/en_lazarus.html , http://www.martinole.org/TAChart.html ...some of these are GPU components that supposedly work with some versions of Delphi. Perhaps this is your lucky day as there is some source code. The first and third listed probably will work reasonably for histograms. You may have to write your own statistics algorithms.
Found this thread while doing some searching. The ImageEn component suite has a THistogramBox component. It's the NOT prettiest thing in the world, but it's the only one I've found so far.
http://www.imageen.com
I came across a histogram example in a gdiplus package available for download from code central. I don't know if it will do what you need but when I saw it I remembered your SO question.
HTH.
If you were using firemonkey, you could just created a series of TRectangles in series. They can be made unclickable by turning hittest off. Or is that too easy and straightforward?
I am looking for a quite specific tool for generating charts, within Ruby on Rails application. I have done a research and couldn't find a solution that suits me.
Maybe you've bumped upon it and could just point me to it with a link? :)
My requirements for a solution are:
it has to feature basic chart types
like Pie, Bar, Stacked Bar, Line.
it has to have basic configuration of
a chart like legend, axis
description.
it has to be able to generate and save chart into image file without
actually rendering it in a browser
being a Ruby library would be nice,
but it is not obligatory
not being Gruff Graphing Library, I
am looking for something more up to
date, with less issues.
If you are aware about something, please post a link - it'll take you just a few seconds.
I think, that it is what you're looking for.
http://highcharts.com/
https://github.com/loudpixel/highcharts-rails
I've made a number of useful charts with the Google Chart API. There are a few gems: googlecharts, gchartrb. I haven't used them but they look like a good first cut.
As to not displaying it you can just make the call and save the result. No need to render, just make the call, get the URL, and fetch the file.
The only one that has satisfied all these conditions:
I have been able to make it works without need of install weird dependencies
Not has an HTML context requirement (all JS libraries)
Not depends on GCharts (net traffic dependency)
Exports to static graphic format
is gerbilcharts
Chartkick!!!
It's super nice. =)
It's been a long time since I asked this question and I see new people coming and posting new answers, which his great. This small post of mine turned out to be a small compendium of available libraries.
I decided to add my two cents. Nowadays whenever I am dealing with charts I usually use Highcharts. Highcharts is a very pleasant library by itself, but additionally there is incredible gem highcharts_on_rails which facilitates creating charts using DSL written in Ruby.
If you found this question and you're looking for options, consider highcharts_on_rails.
This might be able to do what you want:
Gruff
You can use rchart for plotting various chart.
I am using openflashchart
http://pullmonkey.com/projects/open_flash_chart2/
you can save generated json data in database and render when needed
I am looking for a rails flash graph/chart plugin, for drawing
bar chart,
stacked bar chart,
pie chart,
stacked area chart,
and line graphs
which support the below criteria,
1. Customizable tool tip. For eg: when i am drawing a stacked area graph, i want to display all the y axix values for that x axis point as tool tip.
2. Graph should support on click event
3. The graph should be able to send as an image through inline attachment.
4. Column graph, that should be able to display the value above the bar.
5. Should be able to turn off the animation
6. We can draw two y axis
Any help is highly appreciated.
Thanks in advance.
Nithy"
EDIT: I am willing to purchase a commercial license if its servers the purpose.
I don't know which ones will have all the features that you want but I was playing with charts a while ago and this is a list of some possibilities:
Ziya(http://ziya.liquidrail.com/) - Rails plugin
AmCharts (http://www.amcharts.com/) - The one I ended up using because of flexibility - No rails plugin but it is quite simple to deploy using with rails XML support (I guess it does export images and has all the features you want though it might take a little while to understand and make full use of it)
Fusion Charts (http://www.fusioncharts.com/) - Seems to be a good option if you are willing to inve$t some money on it
Gruff (http://nubyonrails.com/pages/gruff) - Also rails plugin - I don't remember anymore why I decided against it but I think it was because of the lack of animation
OpenFlash (http://openflashchart.com/) - I liked this one though I just used as a proof of concept
I also did try the Timeplot (http://www.simile-widgets.org/timeplot/) that is totally javascript because I had a problem with the amount of points it was required for my charts and the flash-based solutions had several limitations on that. Though I gave it up because of deployment time contraints.
Hope it helps.
Check out Highcharts http://www.highcharts.com/
Cheers,
I also heavily use AmCharts in conjonction with the Ambling Rails plugin.
If you go this way, know that you will pass time in the AmCharts reference documentation for fine-tuning the parameters of your charts. But it's worthwhile considering the results it give.
I have need to produce LINE, BAR, and PIE charts in Rails. I have found several that do all these. However the one caveat is that I can never find a solution that does all as well as XY-SCATTER. I've looked at Gruff,Scruffy,Gnuplot, etc. and none of them do "everything". Can anyone recommend a local (i.e. doesn't require network connectivity) library that can accommodate? GoogleCharts isn't an option as some of this will occur on closed networks.
Best.
If you don't mind commercial solutions, take a look at ChartDirector.
Open Flash Chart Plugin for Ruby on Rails - Graphs
FusionCharts is pretty good if you don't have a problem with Flash.
Have you checked Google charts? I'm not a web developer myself but it seems that, although not implemented in Rails, you can call the chart API and display the generated image.
Looking at the available chart types, it can give you all the types you want.
Edit: A search turned up this google-chart-on-rails wrapper.