GNU Octave Is a (Programmable) Calculator and Is Very Good at Performing % Matrix Operations
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Introduction to GNU Octave
Introduction to GNU Octave Hubert Selhofer, revised by Marcel Oliver updated to current Octave version by Thomas L. Scofield 2008/08/16 line 1 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 8 6 4 2 -8 -6 0 -4 -2 -2 0 -4 2 4 -6 6 8 -8 Contents 1 Basics 2 1.1 What is Octave? ........................... 2 1.2 Help! . 2 1.3 Input conventions . 3 1.4 Variables and standard operations . 3 2 Vector and matrix operations 4 2.1 Vectors . 4 2.2 Matrices . 4 1 2.3 Basic matrix arithmetic . 5 2.4 Element-wise operations . 5 2.5 Indexing and slicing . 6 2.6 Solving linear systems of equations . 7 2.7 Inverses, decompositions, eigenvalues . 7 2.8 Testing for zero elements . 8 3 Control structures 8 3.1 Functions . 8 3.2 Global variables . 9 3.3 Loops . 9 3.4 Branching . 9 3.5 Functions of functions . 10 3.6 Efficiency considerations . 10 3.7 Input and output . 11 4 Graphics 11 4.1 2D graphics . 11 4.2 3D graphics: . 12 4.3 Commands for 2D and 3D graphics . 13 5 Exercises 13 5.1 Linear algebra . 13 5.2 Timing . 14 5.3 Stability functions of BDF-integrators . 14 5.4 3D plot . 15 5.5 Hilbert matrix . 15 5.6 Least square fit of a straight line . 16 5.7 Trapezoidal rule . 16 1 Basics 1.1 What is Octave? Octave is an interactive programming language specifically suited for vectoriz- able numerical calculations. -
Lecture 1: Introduction to UNIX
The Operating System Course Overview Getting Started Lecture 1: Introduction to UNIX CS2042 - UNIX Tools September 29, 2008 Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages Lecture Outline 1 The Operating System Description and History UNIX Flavors Advantages and Disadvantages 2 Course Overview Class Specifics 3 Getting Started Login Information Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages What is UNIX? One of the first widely-used operating systems Basis for many modern OSes Helped set the standard for multi-tasking, multi-user systems Strictly a teaching tool (in its original form) Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages A Brief History of UNIX Origins The first version of UNIX was created in 1969 by a group of guys working for AT&T's Bell Labs. It was one of the first big projects written in the emerging C language. It gained popularity throughout the '70s and '80s, although non-AT&T versions eventually took the lion's share of the market. Predates Microsoft's DOS by 12 years! Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages Lecture Outline 1 The Operating System Description and History UNIX Flavors Advantages and Disadvantages 2 Course Overview Class Specifics 3 -
Debian GNU/Linux Installation Guide Debian GNU/Linux Installation Guide Copyright © 2004 – 2015 the Debian Installer Team
Debian GNU/Linux Installation Guide Debian GNU/Linux Installation Guide Copyright © 2004 – 2015 the Debian Installer team This document contains installation instructions for the Debian GNU/Linux 8 system (codename “jessie”), for the 32-bit soft-float ARM (“armel”) architecture. It also contains pointers to more information and information on how to make the most of your new Debian system. Note: Although this installation guide for armel is mostly up-to-date, we plan to make some changes and reorganize parts of the manual after the official release of jessie. A newer version of this manual may be found on the Internet at the debian-installer home page (http://www.debian.org/devel/debian-installer/). You may also be able to find additional translations there. This manual is free software; you may redistribute it and/or modify it under the terms of the GNU General Public License. Please refer to the license in Appendix F. Table of Contents Installing Debian GNU/Linux 8 For armel......................................................................................ix 1. Welcome to Debian .........................................................................................................................1 1.1. What is Debian? ...................................................................................................................1 1.2. What is GNU/Linux? ...........................................................................................................2 1.3. What is Debian GNU/Linux?...............................................................................................3 -
Xv6 Booting: Transitioning from 16 to 32 Bit Mode
238P Operating Systems, Fall 2018 xv6 Boot Recap: Transitioning from 16 bit mode to 32 bit mode 3 November 2018 Aftab Hussain University of California, Irvine BIOS xv6 Boot loader what it does Sets up the hardware. Transfers control to the Boot Loader. BIOS xv6 Boot loader what it does Sets up the hardware. Transfers control to the Boot Loader. how it transfers control to the Boot Loader Boot loader is loaded from the 1st 512-byte sector of the boot disk. This 512-byte sector is known as the boot sector. Boot loader is loaded at 0x7c00. Sets processor’s ip register to 0x7c00. BIOS xv6 Boot loader 2 source source files bootasm.S - 16 and 32 bit assembly code. bootmain.c - C code. BIOS xv6 Boot loader 2 source source files bootasm.S - 16 and 32 bit assembly code. bootmain.c - C code. executing bootasm.S 1. Disable interrupts using cli instruction. (Code). > Done in case BIOS has initialized any of its interrupt handlers while setting up the hardware. Also, BIOS is not running anymore, so better to disable them. > Clear segment registers. Use xor for %ax, and copy it to the rest (Code). 2. Switch from real mode to protected mode. (References: a, b). > Note the difference between processor modes and kernel privilege modes > We do the above switch to increase the size of the memory we can address. BIOS xv6 Boot loader 2 source source file executing bootasm.S m. Let’s 2. Switch from real mode to protected mode. expand on this a little bit Addressing in Real Mode In real mode, the processor sends 20-bit addresses to the memory. -
Network Driver for Micro Os Xv6
NETWORK DRIVER FOR MICRO OS XV6 A Project Presented to the faculty of the Department of Computer Science California State University, Sacramento Submitted in partial satisfaction of the requirements for the degree of MASTER OF SCIENCE in Computer Science by Anmoldeep Singh Sandhu SPRING 2020 © 2020 Anmoldeep Singh Sandhu ALL RIGHTS RESERVED ii NETWORK DRIVER FOR MICRO OS XV6 A Project by Anmoldeep Singh Sandhu Approved by: __________________________________, Committee Chair Dr. Jinsong Ouyang __________________________________, Second Reader Dr. Jingwei Yang ____________________________ Date iii Student: Anmoldeep Singh Sandhu I certify that this student has met the requirements for format contained in the University format manual, and this thesis is suitable for electronic submission to the library. Credit is awarded for the Project. __________________________, Graduate Coordinator ___________________ Dr. Jinsong Ouyang Date Department of Computer Science iv Abstract of NETWORK DRIVER FOR MICRO OS XV6 by Anmoldeep Singh Sandhu The network driver is one of the primary requirements for any operating system. Xv6 is a micro-operating system based on version 6 Unix. The latest version of xv6 does not have support for the ethernet driver or the four-layer UDP/IP model. Our work extends the xv6 operating system to support a functioning network driver with the capability of handling a packet burst. This Project also adds support for UDP/IP and Ethernet protocol to the xv6 operating system. _______________________ Committee Chair Dr. Jinsong Ouyang _____________________ Date v ACKNOWLEDGMENTS I am thankful to Dr. Ouyang for providing me the opportunity to learn new skills in the field of driver development. Dr. Ouyang showed trust in me in carrying out this Project. -
Mac OS X Server
Mac OS X Server Version 10.4 Technology Overview August 2006 Technology Overview 2 Mac OS X Server Contents Page 3 Introduction Page 5 New in Version 10.4 Page 7 Operating System Fundamentals UNIX-Based Foundation 64-Bit Computing Advanced BSD Networking Architecture Robust Security Directory Integration High Availability Page 10 Integrated Management Tools Server Admin Workgroup Manager Page 14 Service Deployment and Administration Open Directory Server File and Print Services Mail Services Web Hosting Enterprise Applications Media Streaming iChat Server Software Update Server NetBoot and NetInstall Networking and VPN Distributed Computing Page 29 Product Details Page 31 Open Source Projects Page 35 Additional Resources Technology Overview 3 Mac OS X Server Introduction Mac OS X Server version 10.4 Tiger gives you everything you need to manage servers in a mixed-platform environment and to con gure, deploy, and manage powerful network services. Featuring the renowned Mac OS X interface, Mac OS X Server streamlines your management tasks with applications and utilities that are robust yet easy to use. Apple’s award-winning server software brings people and data together in innovative ways. Whether you want to empower users with instant messaging and blogging, gain greater control over email, reduce the cost and hassle of updating software, or build your own distributed supercomputer, Mac OS X Server v10.4 has the tools you need. The Universal release of Mac OS X Server runs on both Intel- and PowerPC-based The power and simplicity of Mac OS X Server are a re ection of Apple’s operating sys- Mac desktop and Xserve systems. -
Linux? POSIX? GNU/Linux? What Are They? a Short History of POSIX (Unix-Like) Operating Systems
Unix? GNU? Linux? POSIX? GNU/Linux? What are they? A short history of POSIX (Unix-like) operating systems image from gnu.org Mohammad Akhlaghi Instituto de Astrof´ısicade Canarias (IAC), Tenerife, Spain (founder of GNU Astronomy Utilities) Most recent slides available in link below (this PDF is built from Git commit d658621): http://akhlaghi.org/pdf/posix-family.pdf Understanding the relation between the POSIX/Unix family can be confusing Image from shutterstock.com The big bang! In the beginning there was ... In the beginning there was ... The big bang! Fast forward to 20th century... Early computer hardware came with its custom OS (shown here: PDP-7, announced in 1964) Fast forward to the 20th century... (∼ 1970s) I AT&T had a Monopoly on USA telecommunications. I So, it had a lot of money for exciting research! I Laser I CCD I The Transistor I Radio astronomy (Janskey@Bell Labs) I Cosmic Microwave Background (Penzias@Bell Labs) I etc... I One of them was the Unix operating system: I Designed to run on different hardware. I C programming language was designed for writing Unix. I To keep the monopoly, AT&T wasn't allowed to profit from its other research products... ... so it gave out Unix for free (including source). Unix was designed to be modular, image from an AT&T promotional video in 1982 https://www.youtube.com/watch?v=tc4ROCJYbm0 User interface was only on the command-line (image from late 80s). Image from stevenrosenberg.net. AT&T lost its monopoly in 1982. Bell labs started to ask for license from Unix users. -
The GCC Compilers
Software Design Lecture Notes Prof. Stewart Weiss The GCC Compilers The GCC Compilers Preface If all you really want to know is how to compile your C or C++ program using GCC, and you don't have the time or interest in understanding what you're doing or what GCC is, you can skip most of these notes and cut to the chase by jumping to the examples in Section 6. I think you will be better o if you take the time to read the whole thing, since I believe that when you understand what something is, you are better able to gure out how to use it. If you have never used GCC, or if you have used it without really knowing what you did, (because you were pretty much using it by rote), then you should read this. If you think you do understand GCC and do not use it by rote, you may still benet from reading this; you might learn something anyway. Because I believe in the importance of historical context, I begin with a brief history of GCC. 1 Brief History Richard Stallman started the GNU Project in 1984 with the purpose of creating a free, Unix-like operating system. His motivation was to promote freedom and cooperation among users and programmers. Since Unix requires a C compiler and there were no free C compilers at the time, the GNU Project had to build a C compiler from the ground up. The Free Software Foundation was a non-prot organization created to support the work of the GNU Project. -
Building and Installing Software Packages for Linux Building and Installing Software Packages for Linux
Building and Installing Software Packages for Linux Building and Installing Software Packages for Linux Table of Contents Building and Installing Software Packages for Linux.....................................................................................1 Mendel Cooper −−− http://personal.riverusers.com/~thegrendel/...........................................................1 1.Introduction...........................................................................................................................................1 2.Unpacking the Files..............................................................................................................................1 3.Using Make...........................................................................................................................................1 4.Prepackaged Binaries............................................................................................................................1 5.Termcap and Terminfo Issues...............................................................................................................1 6.Backward Compatibility With a.out Binaries.......................................................................................1 7.Troubleshooting....................................................................................................................................2 8.Final Steps.............................................................................................................................................2 -
A Brief Introduction to Linux
ABriefIntroductiontoLinux What is it? What can I use it for? Alexander B. Pacheco LTS Research Computing September 8, 2015 Outline 1 Introduction to Linux 2 Linux Components 3 Live Demo 2/25 Introduction to Linux Unix History I Unix was conceived and implemented in 1969 at AT&T Bell labs by Ken Thompson, Dennis Ritchie, Douglas McIlroy, and Joe Ossanna. First released in 1971 and was written in assembler. In 1973, Unix was re-written in the programming language C by Dennis Ritchie (with exceptions to the kernel and I/O). The availability of an operating system written in a high-level language allowed easier portability to di↵erent computer platforms. The GNU Project, started in 1983 by Richard Stallman, had the goal of creating a “complete Unix-compatible software system” composed entirely of free software. 386BSD released in 1992 and written by Berkeley alumni Lynne Jolitz and William Jolitz. FreeBSD, NetBSD, OpenBSD and NextStep (Mac OSX) descended from this Andrew S. Tanenbaum wrote and released MINIX, an inexpensive minimal Unix-like operating system, designed for education in computer science Frustated with licensing issues with MINIX, Linus Torvalds, a student at University of Helsinki began working on his own operating system which eventually became the ”Linux Kernel” Linus released his kernel for anyone to download and help further development. 4/25 Unix History II Linus’s message to comp.os.minix on Aug 26, 1991 Hello everybody out there using minix - I’m doing a (free) operating system (just a hobby, won’t be big and professional like gnu) for 386(486) AT clones. -
GNU Octave a High-Level Interactive Language for Numerical Computations Edition 3 for Octave Version 3.0.1 July 2007
GNU Octave A high-level interactive language for numerical computations Edition 3 for Octave version 3.0.1 July 2007 John W. Eaton David Bateman Søren Hauberg Copyright c 1996, 1997, 1999, 2000, 2001, 2002, 2005, 2006, 2007 John W. Eaton. This is the third edition of the Octave documentation, and is consistent with version 3.0.1 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301{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 ::::::::::::::::::::::::::::::::::::::::::::::: -
Selected Essays of Richard M. Stallman
Free Software, Free Society: Selected Essays of Richard M. Stallman Introduction by Lawrence Lessig Edited by Joshua Gay GNU Press www.gnupress.org Free Software Foundation Boston, MA USA First printing, first edition. Copyright © 2002 Free Software Foundation, Inc. ISBN 1-882114-98-1 Published by the Free Software Foundation 59 Temple Place Boston, MA Tel: 1-617-542-5942 Fax: 1-617-542-2652 Email: [email protected] Web: www.gnu.org GNU Press is an imprint of the FSF. Email: [email protected] Web: www.gnupress.org Please contact the GNU Press for information regarding bulk purchases for class- room or user group use, reselling, or any other questions or comments. Original artwork by Etienne Suvasa. Cover design by Jonathan Richard. Permission is granted to make and distribute verbatim copies of this book provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute translations of this book into another language, from the original English, with respect to the conditions on distribution of modified versions above, provided that it has been approved by the Free Software Foundation. i Short Contents Editor’s Note................................................ 1 A Note on Software .......................................... 3 Topic Guide ................................................ 7 Introduction ............................................... 11 Section One ............................................... 15 1 The GNU Project ....................................... 17 2 The GNU Manifesto ..................................... 33 3 Free Software Definition ................................. 43 4 Why Software Should Not Have Owners ..................... 47 5 What’s in a Name? ...................................... 53 6 Why “Free Software” is Better than “Open Source” ............ 57 7 Releasing Free Software if You Work at a University ........... 63 8 Selling Free Software ...................................