Graphael line chart [closed] - javascript

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Is there a good tutorial for Graphael (special line charts), I currently trying to implement such a graph with grafael http://www.highcharts.com/demo/?example=line-time-series&theme=default unfortunately there is no documentation.

A useful resource has been Kenny Shen's GitHub repository where he has begun writing up both documentation and examples for gRaphael.
https://github.com/qoelet/g.raphael
As an example check out the line chart documentation here

The best example of a Raphael linechart must be this one: http://g.raphaeljs.com/linechart.html, from the source code you can get a lot of information on how they work and how they can be configured.
As far as I know there is no official documentation on this (yet?).

To change the stacking of the lines, use the toFront and toBack functions.
linechart.lines[index].toFront();

You could also check out RaphAlytics since it gives you quite a few options you can customize as well as the freedom to use multiple lines in the same graph and textual labels (which, unfortunately, gRaphael does not)
Check it out over here: https://github.com/tataencu/raphalytics

For line charts here is good article: https://www.exratione.com/2011/10/a-few-tips-for-graphael-line-charts/

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What library can I use to implement this chart in my website? [closed]

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apologies if the question is not phrased the best way but I'm not a native English speaker and I'm not sure how this chart is called exactly. Basically this is what I'm looking for :
Do you know a library that I can use to implement this chart and if you could point me to an example I'd be very grateful!
Use chartjs visit chartsJs official site. You are talking about a vertical bar cart. See chartjs documentation for the modifications you like to make. If you want to make groupings then chartsJs allows you to make groups, See the example image You can also make stacks and do many cool things like animations and so on.
http://www.chartjs.org/samples/latest/charts/bar/vertical.html
you might like:
http://www.chartjs.org/docs/latest/charts/bar.html
if you want more options, you can also check how to make a bar chart with d3:
https://bost.ocks.org/mike/bar/
You can use amcharts. It supports nice and easy customizations.

Javascript library to create heroku dashboard like app [closed]

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Could anyone please point me to any standard library/ tool that can be used to build a heroku status type dashboard quickly ?
There are several solutions
timeline.knightlab.com is a good fit, you can link a Google Spreadsheet to it and when you add data to the spreadsheet, it will render these data as a timeline on your webpage.
tympanus.net/codrops/2013/05/02/vertical-timeline you can follow this tutorial also, it guides you how to create one, and they have a demo and source code of the demo.
tympanus.net/codrops/2011/12/05/lateral-on-scroll-sliding-with-jquery
is same as above.
Try http://timeglider.com/widget also.
UPDATE
if you want a timeline with 2 axes, you can follow the Tympanus vertical timeline tutorial. Simply creating 2 timelines stacked side by side would do.
Also, you can use two sides of the axis to separate the Dev and Production like in 'lateral on scroll sliding with jquery' example.
If you follow the above tutorials, you can hack the codes to fix it for your need.

Visualizing Charts Tutorial [closed]

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I'm wondering which JS library would be best to dynamically visualize survey data from a postgres db. I've been looking at morris.js, google visualizations, rapael.js, and D3. The survey has_many questions which in turn has_many answers whose votes' columns are incremented by one per an SMS vote(using Twilio). So I'm looking for a charts library that could dynamically update each time my controller receives an SMS, be easy to learn, and ideally have a couple tutorials related to what I'm trying to build.
What have you used and prefer? Any recommendations? Thanks!!
2 big players in this!!!raphael.js and d3.js
D3 for obvious reasons:
based on current web standards(html5,javascript)
good documentation
powerful,robust and reusable
jquery style selection
the only place where raphael defeats d3 is fallback,raphael supports older versions of IE where as d3 is based on current web standards(IE>9)

How to read and understand ExtJS Source code? [closed]

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I'm programming in ExtJS recently. I can understand the usage of config for components.
But, when someone says to make a custom class by extending existing class to add additional functionality, I get totally confused.
So, my question is -
Is there any tutorial / site that explains the source code and it's meaning and how to customize it to our own implementation ?
Thanks
Sencha has good tutorials for ExtJS. They can all be found here.
They also have tutorials that define programming concepts. The specific one you mentioned that describes "custom classes" to create your own Javascript objects in ExtjS is this one.
There are many others in the "Concepts" category of the first linked page above which I found very helpful if you are going to be doing much with ExtJS.

Javascript framework popularity [closed]

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Are there any resources comparing the adoption rates of the various javascript frameworks similar to tcpi? Basically the number of sites using a particular framework on a time-line would be ideal.
I don't know of anything specifically like that, though Google Trends is probably a pretty good indication of popularity. For example, you can compare jquery and mootools:
http://www.google.com/trends?q=jquery,+mootools
You can use google trends for that:
http://www.google.com/trends?q=javascript+jquery%2C+javascript+prototype%2C+mootools%2C+javascript+yui&ctab=0&geo=all&date=all&sort=0
It's not totally accurate since it relies on searches made on google, but it gives a good idea
Take this three
Wikipedia article
SurveyMonkey
Another survey
(source: getdropbox.com)
I ran once into following estimation methods:
Community activity: using github - stars/forks/open/closed issues
FAQ support: using StackExchange API - questions/answered(solved)/avr. answers per question
Here I fetched these stats to compare AngularJs/Backbone/EmberJs (13.06.2014)
http://www.slideshare.net/dsheiko/java-script-framework-making-the-right-choice

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