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- Octave uses standard mathematical notation with the advantage over low-level languages that operators may act on scalars, vector, matrices, or N-dimensional arrays. For example, to multiply the matrix A by a scalar value, type the command octave:4> 2 * A To multiply the two matrices A and B, type the command octave:5> A * B
docs.octave.org/v4.4.0/Simple-Examples.html
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Mar 5, 2024 · The last line above is known as the Octave prompt and, much like the prompt in Linux, this is where you type Octave commands. To do simple arithmetic, use + (addition), -(subtraction), * (multiplication), / (division), and ^ (exponentiation).
- Command Evaluation
- Elementary Math
- Matrices
- Linear Algebra
- Accessing Elements
- Control Flow with Loops
- Vectorization
- Plotting
- Strings
- Getting Help
The output of every command is printed to the console unless terminated witha semicolon ;. The disp command can be used to print outputanywhere. Use exit or quit to quit the console.Read more about command evaluation.
Many mathematical operators are available in addition to the standardarithmetic. Operations are floating-point. Read moreabout elementary math.
Arrays in Octave are called matrices. One-dimensional matrices are referredto as vectors. Use a space or a comma , to separate elements in a row andsemicolon ; to start a new row. Read moreabout matrices.
Many common linear algebra operations are simple to program using Octave’smatrix syntax. Read moreabout linear algebra.
Octave is 1-indexed. Matrix elements are accessed asmatrix(rowNum, columnNum). Read moreabout accessing elements.
Octave supports for and while loops, as well as other control flowstructures. Read moreabout control flow.
For-loops can often be replaced or simplified using vector syntax. Theoperators *, /, and ^ all support element-wise operations writinga dot . before the operators. Many other functions operate element-wiseby default (sin, +, -, etc.). Read moreabout vectorization.
The function plot can be called with vector arguments tocreate 2D line and scatter plots. Read moreabout plotting.
Strings are simply arrays of characters. Strings can be composed usingC-style formatting with sprintf orfprintf. Read moreabout strings.
The help and doccommands can be invoked at theOctave prompt to print documentation for any function.
This chapter explains some of Octave’s basic features, including how to start an Octave session, get help at the command prompt, edit the command line, and write Octave programs that can be executed as commands from your shell.
octave lerun Octave commands in octave --eval codeevaluate using Octave octave --help describe command line options quit or exit exit Octave Ctrl-C terminate current command and return to top-level prompt Getting Help help commandbrie y describe doc use Info to browse Octave manual doc commandsearch for in Octave manual lookfor strsearch for ...
Sep 24, 2021 · In this article, we will see how to load and play with the data inside matrices and vectors in Octave. Here are some basic commands and function to regarding with matrices and vector in Octave : 1. The dimensions of the matrix : We can find the dimensions of a matrix or vector using the size() function. C/C++ Code % declaring the matrix M = [1 2 3;
Octave can easily be used for basic numerical calculations. Octave knows about arithmetic operations (+,-,*,/), exponentiation (^), natural logarithms/exponents (log, exp), and the trigonometric functions (sin, cos, …). Moreover, Octave calculations work on real or imaginary numbers (i,j).
Chapter 1: Introducing GNU Octave 7 So what is GNU Octave? 7 Applications 9 Limitations of Octave 9 Octave and MATLAB 10 The Octave community 10 Installing Octave 11 Windows 11 GNU/Linux 12 Building Octave from the source under GNU/Linux 14 Time for action – building Octave from source 14 Checking your installation with peaks 15
