search for: statitc

...e format, The file contains very large weather information from every zone of the world,I want to extract only a part of them to calcuate, like the information in a city or the information between exact latitute range and longtitude range, can r tool help me to do that or in some point r tool is a statitcal software which focus on mathmatical caculation and the user have to translate the special data files into some data structure like array or vector by himself, then the r tools use the array or vector to calculate? I am very looking forward to your reply thanks very much sincerely mat chueng [[a...