Spend a little bit of time ensuring that your code is easy for others to read: The shorter your code is, the easier it is to understand. Include the output of sessionInfo as a comment. This summarises your R environment and makes it easy to check if you’re using an out-of-date package. You can check you have actually made a reproducible example by starting up a fresh R session and pasting your script in.
Before putting all of your code in an email, consider putting it on http: It will give your code nice syntax highlighting, and you don’t have to worry about anything getting mangled by the email system. If it is clear that you have done basic background research, you are far more likely to get an informative response.
See also Further Resources further down this page. RSiteSearch for further options and to restrict searches. Read the online help for relevant functions type? Search the R-faq and the R-windows-faq if it might be relevant http: Try to find an answer by searching the archives of the forum you plan to post to. Try to find an answer by searching the Web. Try to find an answer by reading the manual. Try to find an answer by reading a FAQ.
Environment and politics[ edit ] The mountains near Queenstown, Tasmaniacompletely denuded of vegetation through effects of mining Mining has created major economic benefits for the country, but has also had a substantial environmental impact in some areas of Australia. Historically, the Victorian gold rush was the start of the economic growth of the country, leading to major increases in population. However, it also resulted in deforestation, consequent erosion, and pollution in the areas that were mined.
Queenstown, Tasmania ‘s mountains were also completely denuded through a combination of logging and pollution from a mine smelter, and remain bare today. The Australian Labor Partyone of Australia’s two major parties, maintains a policy of “no new uranium mines”. As ofthe increased world demand for uranium has seen some pressure, both internally and externally on the ALP, for a policy change.
Despite two days of frantic pumping the waters filled the mine shaft. The trapped men scrawled last notes to their loved ones on billy cans before they drowned. Some of these have been kept and still bear the messages. The men that perished left 17 widows and 75 dependent children.
In there was an explosion in the mine and 96 men and boys lost their lives, either while at work or in the course of trying to save the lives of others.
Feature Selection Attribute Selection Feature selection also is known as variable selection.