There are many forms of chart but this webpage considers three main types:
Bar charts. Suitable for presenting sizes of related measurements. For example, average salaries of different ethnic groups.
Line graphs. Suitable for presenting a series of values which change over time. For example, monthly inflation rate figures.
Pie charts. Suitable where it is important to show each value as a share of the total. Fo
When we (the designers) visualize data, we encode the quantitative information in shapes, color, position, etc. The viewers then have to decode that information. Cleveland and McGill studied what people are able to decode most accurately and ranked them in the following list.
Position along a common scale e.g. scatter plot
Position on identical but nonaligned scales e.g. multiple scatter plots
Length e.g. bar chart
Angle & Slope (tie) e.g. pie chart
Area e.g. bubbles
Volume, density, and color saturation (tie) e.g. heatmap
Color hue e.g. newsmap
Credit to the Guardian for allowing @bengoldacre to write a column criticising Observer coverage of fish oil/omega-3 http://bit.ly/d1MU6K
Correction: Great piece in latest Journalist defending media studies courses http://bit.ly/bVu3p1 ta @richsimcox
The pilot scheme will see the disability charity ask wealthy supporters for a donation of £2,800 (worth £3,500 with gift aid), accompanied by a three-year loan of £7,000. Against this investment of £10,500, Scope will be able to secure a commercial loan of £7,500.
1. Total number of FOI requests received by the authority, dating
from 1st Jan 2005 to present day, and broken down annually.
2. Out of these, the number that received a response within the
20-working day limit.
XPath is used to navigate through elements and attributes in an XML document.
Great piece in the latest Journalist defending media studies courses – shame I can't link any deeper than http://bit.ly/d0gd5f
3.4 Why does require return false when loading a file from a gem?
Require returns false when loading a file from a gem. Usually require will return true when it has loaded correctly. What’s wrong?
Nothing. Well, something. But nothing you need to worry about.
A false return from the require method does not indicate an error. It just means that the file has already been loaded.
An HTML, XML, SAX, & Reader parser with the ability to search documents via XPath or CSS3 selectors… and much more
links for 2010-06-05