DOCSLIB.ORG

GNU Octave a High-Level Interactive Language for Numerical Computations Edition 3 for Octave Version 2.1.X February 1997

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
GNU Octave a High-Level Interactive Language for Numerical Computations Edition 3 for Octave Version 2.1.X February 1997 GNU Octave A high-level interactive language for numerical computations Edition 3 for Octave version 2.1.x February 1997 John W. Eaton Copyright c 1996, 1997 John W. Eaton. This is the third edition of the Octave documentation, and is consistent with version 2.1.x of Octave. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the con- ditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Permission is granted to copy and distribute translations of this manual into another lan- guage, under the same conditions as for modified versions. Portions of this document have been adapted from the gawk, readline, gcc, and C library manuals, published by the Free Software Foundation, 59 Temple Place|Suite 330, Boston, MA 02111{1307, USA. i Table of Contents Preface . 1 Acknowledgements . 1 How You Can Contribute to Octave . 4 Distribution . 4 1 A Brief Introduction to Octave . 5 1.1 Running Octave . 5 1.2 Simple Examples . 5 Creating a Matrix . 5 Matrix Arithmetic . 6 Solving Linear Equations . 6 Integrating Differential Equations . 6 Producing Graphical Output . 7 Editing What You Have Typed. 7 Help and Documentation . 8 1.3 Conventions . 8 1.3.1 Fonts . 8 1.3.2 Evaluation Notation . 8 1.3.3 Printing Notation. 9 1.3.4 Error Messages . 9 1.3.5 Format of Descriptions . 9 1.3.5.1 A Sample Function Description . 9 1.3.5.2 A Sample Command Description . 10 1.3.5.3 A Sample Variable Description . 11 2 Getting Started. 13 2.1 Invoking Octave. 13 2.1.1 Command Line Options . 13 2.1.2 Startup Files . 15 2.2 Quitting Octave . 16 2.3 Commands for Getting Help . 16 2.4 Command Line Editing . 18 2.4.1 Cursor Motion . 18 2.4.2 Killing and Yanking . 19 2.4.3 Commands For Changing Text . 19 2.4.4 Letting Readline Type For You . 20 2.4.5 Commands For Manipulating The History . 20 2.4.6 Customizing readline . 22 2.4.7 Customizing the Prompt . 22 2.4.8 Diary and Echo Commands . 23 2.5 How Octave Reports Errors . 24 2.6 Executable Octave Programs . 25 2.7 Comments in Octave Programs . 26 ii GNU Octave 3 Data Types . 29 3.1 Built-in Data Types . 29 3.1.1 Numeric Objects . 29 3.1.2 Missing Data . 29 3.1.3 String Objects. 30 3.1.4 Data Structure Objects . 30 3.2 User-defined Data Types. 30 3.3 Object Sizes . 30 4 Numeric Data Types. 33 4.1 Matrices . 33 4.1.1 Empty Matrices . 36 4.2 Ranges . 37 4.3 Logical Values . 37 4.4 Predicates for Numeric Objects. 38 5 Strings . 39 5.1 Creating Strings . 40 5.2 Searching and Replacing . 41 5.3 String Conversions . 43 5.4 Character Class Functions . 46 6 Data Structures . 47 7 Containers . 51 7.1 Lists . 51 7.2 Cell Arrays . 51 8 I/O Streams. 53 9 Variables . 55 9.1 Global Variables . 55 9.2 Persistent Variables . 56 9.3 Status of Variables . 57 9.4 Summary of Built-in Variables . 59 9.5 Defaults from the Environment . 64 iii 10 Expressions . 65 10.1 Index Expressions . 65 10.2 Calling Functions . 66 10.2.1 Call by Value . 67 10.2.2 Recursion . 68 10.3 Arithmetic Operators. 68 10.4 Comparison Operators. 70 10.5 Boolean Expressions. 70 10.5.1 Element-by-element Boolean Operators. 71 10.5.2 Short-circuit Boolean Operators . 71 10.6 Assignment Expressions . 72 10.7 Increment Operators . 74 10.8 Operator Precedence . 75 11 Evaluation . 77 12 Statements . 79 12.1 The if Statement . 79 12.2 The switch Statement . 81 12.3 The while Statement. 82 12.4 The do-until Statement . 83 12.5 The for Statement . 84 12.5.1 Looping Over Structure Elements . 84 12.6 The break Statement. 85 12.7 The continue Statement . 86 12.8 The unwind_protect Statement. 87 12.9 The try Statement . 88 12.10 Continuation Lines . 88 13 Functions and Script Files. 91 13.1 Defining Functions.
Load more

Recommended publications
  • Oracle Database Administrator's Reference for UNIX-Based Operating Systems
    Oracle® Database Administrator’s Reference 10g Release 2 (10.2) for UNIX-Based Operating Systems B15658-06 March 2009 Oracle Database Administrator's Reference, 10g Release 2 (10.2) for UNIX-Based Operating Systems B15658-06 Copyright © 2006, 2009, Oracle and/or its affiliates. All rights reserved. Primary Author: Brintha Bennet Contributing Authors: Kevin Flood, Pat Huey, Clara Jaeckel, Emily Murphy, Terri Winters, Ashmita Bose Contributors: David Austin, Subhranshu Banerjee, Mark Bauer, Robert Chang, Jonathan Creighton, Sudip Datta, Padmanabhan Ganapathy, Thirumaleshwara Hasandka, Joel Kallman, George Kotsovolos, Richard Long, Rolly Lv, Padmanabhan Manavazhi, Matthew Mckerley, Sreejith Minnanghat, Krishna Mohan, Rajendra Pingte, Hanlin Qian, Janelle Simmons, Roy Swonger, Lyju Vadassery, Douglas Williams This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. If this software or related documentation is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, the following notice is applicable: U.S. GOVERNMENT RIGHTS Programs, software, databases, and related documentation and technical data delivered to U.S.
    [Show full text]
  • Appendix A. Installation and Troubleshooting
    The Almagest A-1 Appendix A. Installation and Troubleshooting Authors: Joseph T. Buck Christopher Hylands Alan Kamas Other Contributors: Stephen Edwards Edward A. Lee Kennard White A.1 Introduction This appendix consists of the following sections: • “Obtaining Ptolemy” on page A-1 discusses how to obtain Ptolemy. • “Ptolemy mailing lists and the Ptolemy newsgroup” on page A-2, discusses various forums for discussion about Ptolemy. • “Installation” on page A-3 discusses how to install Ptolemy. • “Troubleshooting” on page A-15 discusses how to find and fix problems in Ptolemy. • “Known bugs” on page A-32 lists known problems in Ptolemy. • “Additional resources” on page A-39 discusses other resources. A.2 Obtaining Ptolemy Ptolemy binaries are currently available for the following architectures: HP running HPUX10.20, Sun 4 (Sparc) running Solaris2.5.1,. In addition, Ptolemy has been compiled on SunOS4.x HPUX9.x, Linux RedHat 5.0, NetBSD_i386, IBM RS/6000 AIX4.x, SGI Irix6.x and the DEC Alpha Digital Unix 4 platforms. These additional platforms are not supported in- house and thus these ports are not tested and may not be complete. Installing the full system requires about 150 Megabytes of disk space (more if you optionally remake). The demonstration version of Ptolemy, “Ptiny,” only requires 12 Mega- bytes of disk space. All versions requires at least 8 Megabytes of physical memory. For the latest information on Ptolemy, get the Frequently Asked Questions list. Send electronic mail to [email protected] with the message: get ptolemy-hackers.FAQ in the body (not the subject) of the message.
    [Show full text]
  • GNU/Linux Operating System
    A Bibliography of Publications about the GNU/Linux Operating System Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 07 April 2021 Version 2.135 Title word cross-reference [Tho05]. 0-13-167984-8 [Sta07b]. 0-596-00482-6 [Sch04]. 0-7821-4428-4 [Koh06]. '03 [ACM03b]. 046 [Sav11]. '05 [ACM05b, MS05]. + [Ste01e]. $100 [CS95]. $39.95 [Sch04]. $44.99 [Sta07b]. $49.95 [Jen05]. $49.99 1 [FOP06, Jen05, She03]. 1-59327-036-4 [Hid04, Tho05]. $59.99 [Koh06]. $99 [Jen05]. 1-GHz [Ano03b]. 1.0 [Coc01]. 1.2 [Kro00]. = [Ste01e]. × [Hun99]. [Gar98]. 1.x [KGG00]. 10 [DWV06]. 10-Gigabit [cFJH+03]. 10th [USE96a]. * [TYKZ07]. */ [TYKZ07]. *BSD [Den99a]. 12-step [Mil01]. 12th [MS05]. 1394 *icomment [TYKZ07]. [Ale00, HKP09]. 14-16 [ACM06]. 18th [KD96]. 1999 [Den99b, Tim99]. 19th -dienste [WF03]. [ACM03b, SS05b]. 1Z0 [Sav11]. 1Z0-046 [Sav11]. /*icomment [TYKZ07]. /GNOME [Wri00, Pen99]. 2 [Ano94c, Com00, Com03, Gab07, MK04]. 2.0 [B¨ol01, Car98, McN99, PF97, Swe01]. 0 [Hid04, Koh06, Sch04, Sta07b, Tho05]. 2.0.1 [ISO05]. 2.1 [BR95, CV00]. 2.2 0-13-101415-3 [Hid04]. 0-13-144853-6 1 2 [Ano00b, BB99b, Bra04]. 2.4 [Cal00]. 2.6 [Mon00b, GR09]. Action [NR03]. ActiveX [BS05, PTS+14, TCM07]. 2000 [Kro99]. activity [MB08]. Acumen [Kro99]. [Bru02, Kro00, MYH00, War01]. 2003 Ada [SB99]. Ada95 [Gar09].
    [Show full text]
  • Solaris 10 1008 Patch List
    Solaris 10 10/08 Patch List Oracle Corporation 500 Oracle Parkway Redwood City, CA 94065 U.S.A. Part No: 820–5768–10 September 2008 Copyright © 2008, 2011, Oracle and/or its affiliates. All rights reserved. License Restrictions Warranty/Consequential Damages Disclaimer This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. Warranty Disclaimer The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. Restricted Rights Notice If this is software or related documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, the following notice is applicable: U.S. GOVERNMENT RIGHTS Programs, software, databases, and related documentation and technical data delivered to U.S. Government customers are "commercial computer software" or "commercial technical data" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, the use, duplication, disclosure, modification, and adaptation shall be subject to the restrictions and license terms set forth in the applicable Government contract,and, to the extent applicable by the terms of the Government contract, the additional rights set forth in FAR 52.227-19, Commercial Computer Software License (December 2007).
    [Show full text]
  • GNU Octave a High-Level Interactive Language for Numerical Computations Edition 3 for Octave Version 2.0.13 February 1997
    GNU Octave A high-level interactive language for numerical computations Edition 3 for Octave version 2.0.13 February 1997 John W. Eaton Published by Network Theory Limited. 15 Royal Park Clifton Bristol BS8 3AL United Kingdom Email: [email protected] ISBN 0-9541617-2-6 Cover design by David Nicholls. Errata for this book will be available from http://www.network-theory.co.uk/octave/manual/ Copyright c 1996, 1997John W. Eaton. This is the third edition of the Octave documentation, and is consistent with version 2.0.13 of Octave. Permission is granted to make and distribute verbatim copies of this man- ual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the en- tire resulting derived work is distributed under the terms of a permission notice identical to this one. Permission is granted to copy and distribute translations of this manual into another language, under the same conditions as for modified versions. Portions of this document have been adapted from the gawk, readline, gcc, and C library manuals, published by the Free Software Foundation, 59 Temple Place—Suite 330, Boston, MA 02111–1307, USA. i Table of Contents Publisher’s Preface ...................... 1 Author’s Preface ........................ 3 Acknowledgements ........................................ 3 How You Can Contribute to Octave ........................ 5 Distribution .............................................. 6 1 A Brief Introduction to Octave ....... 7 1.1 Running Octave...................................... 7 1.2 Simple Examples ..................................... 7 Creating a Matrix ................................. 7 Matrix Arithmetic ................................. 8 Solving Linear Equations..........................
    [Show full text]
  • Validation of the Computed Assessment of Cleansing Score With
    1130-0108/2016/108/11/709-715 REVISTA ESPAÑOLA DE ENFERMEDADES DIGESTIVAS REV ESP ENFERM DIG © Copyright 2016. SEPD y © ARÁN EDICIONES, S.L. 2016, Vol. 108, N.º 11, pp. 709-715 ORIGINAL PAPERS Validation of the computed assessment of cleansing score with the Mirocam® system Ana Ponte, Rolando Pinho, Adélia Rodrigues, Joana Silva, Jaime Rodrigues and João Carvalho Department of Gastroenterology. Centro Hospitalar Vila Nova de Gaia/Espinho. Gaia, Portugal ABSTRACT agement of patients with suspected small-bowel diseas- es, including obscure gastrointestinal bleeding (OGIB), Background and aims: A computed assessment of cleans- Crohn’s disease, small-bowel tumors, polyposis syndromes ing (CAC) score was developed to objectively evaluate small-bowel cleansing in the PillCam capsule endoscopy (CE) system and to and celiac disease (1,7-11). Although previous studies overcome the subjectivity and complexity of previous scoring sys- report a higher diagnostic yield compared with other meth- tems. Our study aimed to adapt the CAC score to the Mirocam® ods including push enteroscopy, radiologic procedures or system, evaluate its reliability with the Mirocam® CE system and angiography, CE has some limitations (5-7,12-16). Two compare it with three validated subjective grading scales. factors which negatively impair the diagnostic yield of CE Patients and methods: Thirty CE were prospectively and independently reviewed by two authors who classified the degree of are the presence of intestinal debris and air bubbles and small-bowel cleanliness according to a quantitative index, a qualita- the failure to complete an entire small-bowel examination tive evaluation and an overall adequacy assessment.
    [Show full text]
  • Vxworks Application Programmer's Guide
    VxWorks Application Programmer's Guide VxWorks® APPLICATION PROGRAMMER’S GUIDE 6.2 Copyright © 2005 Wind River Systems, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means without the prior written permission of Wind River Systems, Inc. Wind River, the Wind River logo, Tornado, and VxWorks are registered trademarks of Wind River Systems, Inc. Any third-party trademarks referenced are the property of their respective owners. For further information regarding Wind River trademarks, please see: http://www.windriver.com/company/terms/trademark.html This product may include software licensed to Wind River by third parties. Relevant notices (if any) are provided in your product installation at the following location: installDir/product_name/3rd_party_licensor_notice.pdf. Wind River may refer to third-party documentation by listing publications or providing links to third-party Web sites for informational purposes. Wind River accepts no responsibility for the information provided in such third-party documentation. Corporate Headquarters Wind River Systems, Inc. 500 Wind River Way Alameda, CA 94501-1153 U.S.A. toll free (U.S.): (800) 545-WIND telephone: (510) 748-4100 facsimile: (510) 749-2010 For additional contact information, please visit the Wind River URL: http://www.windriver.com For information on how to contact Customer Support, please visit the following URL: http://www.windriver.com/support VxWorks Application Programmer’s Guide, 6.2 9 Oct 05 Part #: DOC-15673-ZD-00 Contents
    [Show full text]
  • Predictive Application Server™ 11.1 Standards for Developing RPAS Extensions
    Retek® Predictive Application Server™ 11.1 Standards for Developing RPAS Extensions Corporate Headquarters: The software described in this documentation is furnished under a license agreement, is the confidential information of Retek Inc. Retek Inc., and may be used only in accordance with the Retek on the Mall terms of the agreement. 950 Nicollet Mall No part of this documentation may be reproduced or Minneapolis, MN 55403 transmitted in any form or by any means without the express USA written permission of Retek Inc., Retek on the Mall, 950 888.61.RETEK (toll free US) Nicollet Mall, Minneapolis, MN 55403, and the copyright Switchboard: notice may not be removed without the consent of Retek Inc. +1 612 587 5000 Information in this documentation is subject to change Fax: without notice. +1 612 587 5100 Retek provides product documentation in a read-only-format to ensure content integrity. Retek Customer Support cannot European Headquarters: support documentation that has been changed without Retek authorization. Retek ® TM 110 Wigmore Street Retek Predictive Application Server is a trademark of London Retek Inc. W1U 3RW Retek and the Retek logo are registered trademarks of Retek United Kingdom Inc. Switchboard: This unpublished work is protected by confidentiality +44 (0)20 7563 4600 agreement, and by trade secret, copyright, and other laws. In Sales Enquiries: the event of publication, the following notice shall apply: +44 (0)20 7563 46 46 ©2004 Retek Inc. All rights reserved. Fax: All other product names mentioned are trademarks or +44 (0)20 7563 46 10 registered trademarks of their respective owners and should be treated as such.
    [Show full text]
  • DOCUMENT RESUME CS 503 730 Speech Research
    DOCUMENT RESUME ED 212 010 CS 503 730 TITLE Speech Research: A Report on the Status and Progress of Studies on the Nature of Speech, Instrumentation for Its Investigation, and Practical Applications, July 1-December 31, 1981. Status Report 67/68. INSTITUTION Haskins Labs., New Haven, Conn. SPONS AGENCY National Institutes of Health (DREW), Bethesda,Md.; National Inst. of Child Health and Human Development (NIH), Bethesda, Md.; Natiorial Inst. of Education (ED), Washington, D.C.; National Inst. of Neurological and Communicative Disorders and Stroke (NIH), Bethesda, Md.; National Science Foundation, Washington, D.C. PUB DATE 81 CONTRACT NICHHD-N01-HD-1-2420 GRANT NICHHD-HD-01994; NIE-G-80-0178; NIH- RR- 35596; NINCDS-NS13870; NSF-MCS79-16177 NOTE 275p. EDRS PRICE MF01/PC11 Plus Postage. DESCRIPTORS *Acoustics; *Articulation (Speech)`; ommunication (Thought Transfer); *Communication Research; Consonants; Context Clues; Hearing Impairments; Language Acquisition; Perception; Perceptual Motor Learning; Phoneme Grapheme Correspondence; *Phonetics; Reading; Sign Language; Silent Reading; *Speech Communication; Vowels ABSTRACT As one of a regular series, this report focuseson the status and progress of studieson the nature of speech, instrumentation for its investigation, and practical applications. Drawn from the period of July 1 to December 31, 1981, the 15 manuscripts cover the following topics: (1) phonetic trading relations and context effects; (2) temporalpatterns of coarticulation; (3) temporal constraintson anticipatory coarticulation;
    [Show full text]
  • Debian GNU Linux.Pdf
    CDAH@MF MT .KHMT W Autores: NATALIA IBETH CIFUENTES NUBIA YOLIMA CUCARIAN LEIDY POVEDA SANDRA MILENA CÁRDENAS Director Unidad Informática: Henry Martínez Sarmiento Tutor Investigación: Robinson Moscoso Coordinadores: Olga Lucia Bravo Ballen Carlos José Acuña Daza Analista de infraestructura y comunicaciones: Adelaida Amaya Analista de Sistemas de Información: Álvaro Palacios Coordinador de servicios Elearning: Daniel Ardila UNIVERSIDAD NACIONAL COLOMBIA FACULTAD DE CIENCIAS ECONÓMICAS UNIDAD DE INFORMÁTICA Y COMUNICACIONES BOGOTÁ D.C. JUNIO 2005 CDAH@MF MT .KHMT W Director Unidad Informática: Henry Martínez Sarmiento Tutor Investigación: Robinson Moscoso Auxiliares de Investigación: Andrés Ricardo Romero Maria Alejandra Enriquez Carolina Acosta María Teresa Mayorga Daniel Enrique Quintero Martha Rubiela Guevara Diana Janneth Organista Meiby Viviana Uyabán Diego Armando Barragán Natalia Ibeth Cifuentes Diego Fernando Rubio Nubia Yolima Cucarían Guillermo Alberto Ariza Renzo Alejandro Clavijo Islena del Pilar González Ricardo Andrés Alejo Jeffer Cañón Hernández Sandra Milena Cárdenas Jenny Teresa Jaramillo Sandra Mónica Bautista Juan Felipe Rincón Sergio Rodríguez Leidy Viviana Aviles Sonia Janeth Ramírez Leidy Diana Rincón Yaneth Adriana Cañón Leydy Johana Poveda Winkler Cruz Liliana Paola Rincón Este trabajo es resultado del esfuerzo de todo el equipo perteneciente a la Unidad de Informática. Se prohíbe la reproducción parcial o total de este documento, por cualquier tipo de método fotomecánico y/o electrónico, sin previa autorización
    [Show full text]
  • Free for All How Linux and the Free Software Move- Ment Undercut the High-Tech Titans
    Free for All How Linux and the Free Software Move- ment Undercut the High-Tech Titans by Peter Wayner This is the free electronic version of the book originally published by HarperCollins. The book is still protected by copyright and bound by a license granting you the limited rights to make complete copies for non-commercial purposes.You’re welcome to read it in electronic form subject to these conditions: 1) You may not make derivative works. You must reproduce the work in its entirety. 2) You may not sell versions. 3) You refer everyone receiving a copy to the website where they may get the latest corrected version. (http://www.wayner.org/books/ffa/). A full license developed by the Creative Commons (www.creativecommons.org) will be forth- coming. Please write ([email protected]) if you have any questions or suggestions. Disappearing Cryptography, 2nd Edition Information Hiding: Steganography & Watermarking by Peter Wayner ISBN 1-55860-769-2 $44.95 To order, visit: http://www.wayner.org/books/discrypt2/ Disappearing Cryptography, Second Edition describes how to take words, sounds, or images and hide them in digital data so they look like other words, sounds, or images. When used properly, this powerful technique makes it almost impossible to trace the author and the recipient of a message. Conversations can be sub- merged in the flow of information through the Internet so that no one can know if a conversation exists at all. This full revision of the best-selling first edition “Disappearing Cryptography is a witty and enter- describes a number of different techniques to hide taining look at the world of information hiding.
    [Show full text]
  • • It Depends on What You Mean by 'Title' P
    TITLE • It deppyyends on what you mean by ‘title’ 2 WOULD YOU RUN WINDOWS ON YOUR GRANDMOTHER’S PACEMAKER? Andrew S. Tanenbaum Vrije Universiteit Amsterdam 3 LINUX IS STILL OBSOLETE Andrew S. Tanenbaum Vrije Universiteit Amsterdam 4 HOW DO WE GET OUT OF THIS MESS? Andrew S. Tanenbaum Vrije Universiteit Amsterdam 5 COMPUTING ERAS • Jurassic Era BRONTIACENIAC STEGIAC 6 OUTLINE OF TALK •Vagggue generalities • Mode switch •Nitty-gritty deta ils o f my resea rc h a nd re lated resea rc h • New stuff 7 MORE ERAS OF COMPUTING Era Example OS Goal of OS Jurassic ENIAC - (none) Mainframe IBM 360 OS/360 Make it work Mini PDP-11 UNIX Make it fast PC x86 Windows Make it pretty Embedded Camera QNX (?) Make it invisible Ubiquitous ? ? Make it helpful Up until now, goal of OS was overcoming hardware limitations (e.g., virtual memory to pretend there was enough memory) 8 MAKING PREDICTIONS • Makinggp predictions is hard • Especially about the future •People k eep tr yin g th ough 9 FAMOUS PREDICTIONS • “Heavier than air flying machines are impossible” – Lor d Ke lv in, Pres iden t o f the Roya l Soc ie ty (1895) • “The ti me will come wh en child ren will b e t aught everything by moving pictures. They will never be obliged to read history again” – D.W. Griffith, director of Birth of a Nation (1915) • “There will be only one orchestra left on earth, giving niggyhtly worldwide concerts” – Bruce Bliven EiC of The New Republic on radio (1922) 10 MORE FAMOUS PREDICTIONS • “The pppproblem with television is that people must sit and keep their eyes glued to the screen; the average American family hasn't time for it.” – New York Times editorial (1939) • “I t hin k t here is a wor ld mar ket for five computers ” – T.J.
    [Show full text]