MATLAB Commands Quiz
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Questions and Answers

La commande ______ permet de créer un graphique.

figure

Pour effacer le graphique actuel, on utilise la commande ______.

clf

La commande ______ ferme tous les graphiques ouverts.

close all

La commande ______ permet d'obtenir le numéro du graphique actuel.

<p>gcf</p> Signup and view all the answers

Pour créer un sous-graphe, on utilise la commande ______.

<p>subplot</p> Signup and view all the answers

Pour résoudre l'équation Ax = b, on utilise la commande ______ ou _______ .

<p>x=inv(A)<em>b solve (A</em>c=b)</p> Signup and view all the answers

Pour créer un graphique en 2D, on utilise la commande ______ avec les valeurs x et y.

<p>plot</p> Signup and view all the answers

La commande ______ est utilisée pour maintenir le graphique actuel dans la figure.

<p>hold</p> Signup and view all the answers

Pour tracer une fonction de manière symbolique, on peut utiliser la commande ______.

<p>ezplot</p> Signup and view all the answers

Pour lire des données dans MATLAB, on utilise la fonction ______

<p>fread</p> Signup and view all the answers

La commande ______ permet de terminer immédiatement une boucle for ou while.

<p>break</p> Signup and view all the answers

Les structures ______ permettent le contrôle conditionnel en matlab.

<p>if et switch</p> Signup and view all the answers

Pour afficher le ______ actuel, on utilise la commande 'pwd'.

<p>répertoire</p> Signup and view all the answers

Pour terminer une boucle, on utilise la commande ________.

<p>break</p> Signup and view all the answers

Pour changer le format des nombres, on utilise la commande ______.

<p>format</p> Signup and view all the answers

Pour lire des données on utilise la commande ______.

<p>input</p> Signup and view all the answers

Pour afficher un message ou une valeur, on utilise la fonction ______. Donnez un exemple.

<p>disp</p> Signup and view all the answers

Study Notes

MATLAB Basics

  • MATLAB is a high-level language for technical computing
  • It's an interactive tool with mathematical and graphical functions
  • MATLAB provides features to access, compute, analyze, and visualize data
  • MATLAB also provides capabilities to interface with external languages

MATLAB Desktop

  • The MATLAB desktop provides a variety of tools for working with MATLAB
  • The current folder shows the files and folders in the current directory
  • The workspace browser shows the variables in the current workspace

Editor/Debugger

  • The editor is used to write and edit MATLAB code
  • The debugger is used to step through MATLAB code and identify errors

Command Window

  • The command window is used to type MATLAB commands and see the results
  • Users can use the arrow keys to scroll through previously entered commands

Getting Help

  • MATLAB provides various ways to get help, including help command, the doc command, and browsing mathworks.de
  • Product Documentation and Support are available
  • Online help resources are accessible

MATLAB Central

  • MATLAB Central is a repository for user-contributed functions and scripts
  • Users can exchange and add functions and scripts
  • Supported by MathWorks employees
  • Newsgroups and Blogs

MATLAB Central - "Cody"

  • Interactive exercises within MATLAB Central
  • Exercises are categorized by topic and difficulty level
  • The "Cody Challenge" group contains problems that users can solve, sorted by number of solvers (high to low)
  • Various MATLAB data import and export options can be accessed through the MATLAB editor window

MATLAB Online Webinars

  • Demonstrations of features, new capabilities, and application examples
  • Live Q&A

MATLAB Central - Bug Reports

  • MATLAB provides a bug report system
  • Users can report bugs and track their status
  • Various options for filtering results by criteria

MATLAB Basics - Data and Variables

  • Scalar versus Matrix/array
  • Variables can have different data types like logical, char, numeric, table, cell, struct or handle
  • Details on how to use size, length etc functions

MATLAB Basics - Assignments and Reserved Variables

  • Assignment: =, suppresses output: ;
  • Reserved variables: pi, i, j, inf, NaN, eps

MATLAB Basics - Operators & Functions

  • Mathematical functions & operators
  • Trigonometric functions (sin, cos, tan)
  • More detailed explanations of exp, log, abs, etc.
  • Additional functions: min, max, mean, std, sum, prod, diag

MATLAB Basics - Vectors & Matrices

  • Creation of vectors and matrices ('x1:x2', 'linspace', 'ones', 'zeros')
  • How to create identity matrices using the eye function
  • random number generation with rand(n) and randn(x)
  • magic(x) generates matrices with equal row and column sums

MATLAB Basics - Managing Variables

  • size(var) returns dimensions of a variable
  • length(var) returns the length of a vector
  • clear all deletes all variables in workspace
  • who, whos list all variables
  • clc clears command window
  • home moves MATLAB prompt to top of Command Window

MATLAB Basics - Relational Operators

  • Comparison operators: =, ~=, <, <=, >, >=
  • Logical operators: &, |, xor, all, any
  • Finding indices of true/false conditions with find

MATLAB Basics - Brackets

  • Functionality of curly braces, parentheses, and square brackets

MATLAB Basics - Paths & Path Management

  • The MATLAB Path
  • Accessing files and folders outside the current working directory
  • Functions to add and manage folders in the MATLAB path

MATLAB Basics - Manipulating Data

  • Creating and manipulating matrices of random numbers
  • Extracting elements from matrices.
  • Applying logical indexing and different matrix operations

MATLAB Basics - Data Import & Export

  • Loading and saving data from and to text files
  • Saving data as MAT files
  • Importing data using different methods

MATLAB-Basics - Data Import & Export: Publish Function

  • Various ways of formatting data import and export with MATLAB

MATLAB - Basics - Introduction to MATLAB

  • Outline of the course, including introductions, 2D plotting options, 3D visualization, data input, and export tools.

Programming with MATLAB - Additional Details on Files and Scripts

  • File handling and script usage
  • tic;code;toc for timing execution
  • Preallocation of memory to improve performance

Programming with MATLAB - Keywords

  • Listing and explaining different MATLAB keywords

Programming with MATLAB - Conditional Statements and Loops

  • if/elseif/else/end structures
  • for and while loops
  • Break and continue statements
  • Immediate function return with the return command

Programming with MATLAB - Creating Scripts

  • How to create different types of comments, including multiline

Programming with MATLAB - User Dialog

  • How to create user inputs using command line methods
  • How to handle escape character inputs or conversion

Programming with MATLAB - Function Definition and Usage

  • How to write different types of MATLAB functions
  • Listing input and output parameters
  • Checking the number of inputs using nargchk(min,max,n) command

Programming with MATLAB - Global and Static Variables

  • How to define and use persistent variables
  • Defining and using global variables
  • Deleting global variables

Programming with MATLAB- Functions, Sub functions & Workspaces

  • How to structure and use functions like sub-functions and nested functions

Programming with MATLAB - Debugging in MATLAB

  • Options for running and debugging MATLAB code

Programming with MATLAB - Optimizing Performance

  • Using tic and toc for determining execution time.
  • Preallocation of memory is a way to improve big data operation performance in MATLAB
  • Using vectorization for optimal matrix operations

Advanced MATLAB - Graphical User Interfaces

  • Constructing a basic GUI Using GUIDE
  • How variables from one part of the program, can interact with other parts.
  • GUI structure and components

Advanced MATLAB - Data Exchange between GUI/ MATLAB and Simulink

  • Data transmission between a GUI, MATLAB and Simulink

Summary

  • MATLAB is described as a high-level technical computing language that combines mathematical, plotting tools, and interaction with other data formats.
  • It provides a strong emphasis on visualization, numerical computation, and supporting various external interfaces..

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Description

Testez vos connaissances sur les commandes MATLAB essentielles pour la création et la manipulation de graphiques. Ce quiz couvre des sujets tels que la création de sous-graphiques, le calcul des valeurs propres, et l'importation et l'exportation de données. Idéal pour les étudiants en mathématiques appliquées et en ingénierie.

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