Thursday, September 13, 2012

Day 7-Team F (Pixy)


Type of Graph and their usuage     
                                                                                                                
Bubble graph
The bubble graph is exciting in that it can show three sets of variables – something most other graphs can’t do. This is done by the x and y axes, as well as the size of the bubble – all of which give a distinct data point. With animation, you can even show an extra variable and have the position and size of these bubbles moving and changing over time – Hans Rosling provides an excellent example of this. This effect can be produced with live charts in PowerPoint 2007 and 2010.
How bubble graph looks like.

Scatter graph
Scatter charts are useful when presenting a complete data set. That data set could show a trend, or an absence of a trend. These charts are typically used when there are lots of data points, so that the viewer can then establish whether there’s a relationship between the data points or not. Practically, these are really only ever produced with a live chart, but that doesn’t mean that they can’t be drawn from scratch. If you really want to be able to interact with the data points individually, the best way to produce an editable version would be to create a live scatter chart and then draw around it
There is still plenty that can be done with a scatter chart you have produced using live charts – you can highlight points and draw trend lines, and compare two sets of data to look at accuracy. As with other graphs, there are plenty of opportunities to make it exciting.

D3 Graph
D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.
D3 is not a monolithic framework that seeks to provide every conceivable feature. Instead, D3 solves the crux of the problem: efficient manipulation of documents based on data. This avoids proprietary representation and affords extraordinary flexibility, exposing the full capabilities of web standards such as CSS3, HTML5 and SVG. With minimal overhead, D3 is extremely fast, supporting large datasets and dynamic behaviors for interaction and animation. D3’s functional style allows code reuse through a diverse collection of components and plugins.
Illustration:  Let's start with a simple D3 example. It's an html file with a simple html5 doctype. The D3 script will be loaded directly from the D3 repository, but you could as well download a copy and load it locally. I've placed a <div> tag to be used as a container for our visualization. The D3 script lay down just before the closing</body> tag to be sure the page is fully loaded and ready to work with, and according to best practices. This example shows the use of D3 for DOM traversal, for adding SVG and HTML elements, for adding styles and attributes and for mouse events binding. Just copy-paste this example in a file named "index.html" opened in your favorite editor and in a recent browser. You can then replace the javascript code by any snippets found in this
Tutorial D3
How D3 looks like





Radar chart
A radar chart, also known as a spider chart or a star chart because of its appearance, plots the values of each category along a separate axis that starts in the center of the chart and ends on the outer ring.
Benefits of spider /radar chart
         Graphically compare multiple potential projects
         Analyzing the strengths and weaknesses of different supply chain strategies
         To make logical comparisons between business opportunities
         Provides insight to potential improvement opportunities

         Helps to understand what variables are dominant for a given process
         Helps to understand which observations are most similar (are there clusters of observations?)

         Helps to understand if there are outliers

         Displays the performance metrics of any process and allows the viewer to see opportunities quickly




 -By- Pixy Raina 
Team F

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