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notes:compess [2010/08/31 18:30] – jjohns43 | notes:compess [2010/09/01 13:40] (current) – tdoud | ||
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+ | Wiki Page for the DATA class. Please Enhance. | ||
+ | For those unfamiliar, here is a page on [[wiki: | ||
+ | |||
+ | =====Problems Logging in to Wiki?===== | ||
+ | Some people have reported problems logging into the wiki. There seems to be two sources of problems experienced: | ||
+ | |||
+ | * User cannot log in. | ||
+ | * User cannot log in using " | ||
+ | |||
+ | If you are confident you are using the correct username and password, and are using a version of Internet Explorer, it is suggested that you use a different browser, such as Firefox, Safari, or Chrome. | ||
+ | |||
+ | If the " | ||
+ | |||
+ | * Uncheck "Use Secure Login" | ||
+ | * Change your password to something that doesn' | ||
+ | |||
+ | ===NUMBER SYSTEMS!=== | ||
+ | |||
+ | < | ||
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+ | For anyone who was confused by the lesson on " | ||
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+ | </ | ||
+ | |||
+ | Let's use the example of the Octal value 24. Why is Octal 24 equal to the number 20 in our typical "base 10" lives? Because equivalent values existing in the < | ||
+ | |||
+ | Now lets try switching bases, but preserving the < | ||
+ | |||
+ | Here's an Example:< | ||
+ | |||
+ | When dealing with the digit 94< | ||
+ | |||
+ | Understanding this, we should be able to recognize that once we reach 99, and need to continue, we will be able to roll one of the imaginary leading zeros up to our next digit and reset everything that follows.< | ||
+ | |||
+ | Counting upward in Base 10:< | ||
+ | 000094< | ||
+ | 000095< | ||
+ | 000096< | ||
+ | 000097< | ||
+ | 000098< | ||
+ | 000099< | ||
+ | 000100 - We simply call this 100, and typically ignore the laws behind why it's a 1 followed by two 0's (The same< | ||
+ | 000101 & | ||
+ | 000102< | ||
+ | |||
+ | We're going to increase the value of our column to the left by 1 factor each time we reach our maximum in the column to it's right. If we apply this concept while counting in any base then we should be able to list the numbers of any number system consecutively. Becoming familiar is simply a matter of practice. | ||
+ | </ | ||
+ | |||
+ | |||
+ | From Tom: I also found a nice conversion chart at http:// | ||
+ | |||
+ | For all the byte enthusiasts, | ||
+ | |||
+ | And finally, a nice conversion chart from ASCII to binary (scroll down page a “bit” :) — http:// |