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Computing in Statistics

by: Cullen Conn

Computing in Statistics 22S 166

Cullen Conn
GPA 3.72

Mary Cowles

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Mary Cowles
Class Notes
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This 4 page Class Notes was uploaded by Cullen Conn on Friday October 23, 2015. The Class Notes belongs to 22S 166 at University of Iowa taught by Mary Cowles in Fall. Since its upload, it has received 30 views. For similar materials see /class/228076/22s-166-university-of-iowa in Natural Sciences and Mathematics at University of Iowa.

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Date Created: 10/23/15
2281166 Computing in Statistics Introduction Lecture 1 August 257 2008 Kate Cowles 374 SH7 33570727 kcowles statuiowaedu Goals of this course are to develop 0 intelligent use of appropriate computing tools for both statistical endeavors RSplus 7 SAS database management software and cone cepts 0 understanding of important statistical come puting algorithms Newton7s method 7 the bootstrap o ability to design and implement simulation studies Statistical endeavors 0 applied statistics and data analysis 0 research in statistical theory and methods 4 0 communication of statistical ideas in words7 numbers7 and graphics LMEX format of scienti c reporting Types of computer products This section and the next 2 borrow heavily from Chapter 1 of the course notes for Statistical Computing and Graphr ics by Flank Harrell heswebl med virgini a edubiostatteachingstatcomp 0 operating systems make the computer itself work eg Linux7 Windows7 Unix7 MacOS 0 applications perform speci c tasks eg Microsoft Word7 Excel7 SrlDlus7 OpenOfr ce7 R7 SAS7 0 commercial systems 7 code and lists of bugs are secret expensive 7 require upgrading and relicensing Microsoft products7 SrlDlus7 SAS7 SPSS7 Unix7 etc 0 free Open Source systems User interfaces graphical vs command line 0 graphical GUL mouse7 menus easier to learn 7 less exible repetitive when the same tasks have to be repeated 7 hard to document the exact steps taken 7 hard to reproduce results 0 command line interfaces harder to learn 7 more flexible and powerful 7 can save commands in scripts to replay when the same tasks have to be performed repeatedly can write generic commands to facilitate running different analyses with the same structure revolution in software availability and funcr tion from the open source movement 7 can see all code7 change it7 learn from it 7 quality generally quite good gtk often better than that of commercially developed software because Open Source software has been tested by more people under more different conditions i more rapid updates 7 most products have an active and helpful user news group 7 generally lack some fancy features like ex tensive GUl Linux7 lATEX R Types of user les 0 text 0 binary 0 graphics les Linux history The material in this section borrows heavily from Section 11 of Introduction to Linux A Hands on Guide by Machtelt Garrels http wwwt1dp orgLDPintroilinuxintroilinux pdf 0 Unix 7 1969 team of developers at Bell Labora tories began work on solution to problem of software incompatibility gtk at that time7 every model of computer had different operating system gtk software was customized to speci c pure poses7 and ran on only one type of come puter system UNIX operating system needed only small piece of code speci c to one type of come puter the kernel 7 operating system and all other functions built around kernel 0 Linus Torvalds and Linux 7 computer science student at University of Helsinki 7 goal to create a freelyravailable operating system that was compliant with original UNIX began working on it in early 19907s other coders jumped aboard to develop drivers to make Linux usable with more and more hardware 7 12000 Linux users by 1993 i all features of UNIX added over few more years higherrlevel programming language C spe cially developed for creating UNIX fat rst used only in very large compute ing environments 7 universities7 governr rnent7 large corporations with mainframes and minicomputers o developments in 1970s and 19807s continued development of UNIX support of UNIX in products of increasing numbers of hardware and software vendors invention of personal computers 7 by end of 19807s7 several versions of UNIX available for PC architecture7 but not free 12 0 Linux today ionly operating system in the world that runs on as wide a range of hardware gtk desktop workstations gtk mid and highrend servers gtk PDAs7 mobiles7 experimental wristwatches7 etci well known as a stable and reliable plat form for servers examples of users gtk Amazon Internet book seller gtk United States Post Of ce gtk German army gtk highrenergy physics Grid Logging in activating the user interface and logging out o PCrbased Linux systems have two basic modes graphical and text 0 in graphical mode usually the default 7 login requires inputting user name in one window and password in another imake sure mouse pointer is in the login window press Enter after entering the user name and after entering the password open a terminal window by left clicking on icon of a computer screen at bottom of screen i log out by gtk closing all terminal windows and applir cations gtk clicking RedHat icon at bottom of screen and selecting Log Out Linux student computer labs o Ul Mathematical Sciences educational come puter laboratories 346 SH primarily for statistics students 7 BB MLH and 301 MLH primarily for math and cs 0 your username and password are assigned by Computer Support Group the rst time you log in7 you should imr mediately change the password they give you i enter the passwd command in a terminal window and follow the instructions or7 click the RedHat icon7 click DlVMS and then Change DlVMS password 7 requirements for passwords gtk from six to eight characters long i in text mode gtk whole screen is black7 with white char acters gtk you are prompted for username and pass word press enter after typing in each one gtk log out by entering logout command and pressing enter gtk use both uppercase and lowercase letr ters and either digits or nonralphabetic symbols or both gtk pick something you will remember with out writing it down gtk dont use the same password on different systems 0 link to information from the Computer Supr port Group CSC on student accounts on the math cs statistics network www divms uiowa eduhelporientation 0 must bring your own printer paper if you wish to print 0 to access lnternet7 click Firefox icon world with a flaming fox the bottom of the screen 0 to log out7 click RedHat icon and select Log utw


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