MATLAB

Question 1

MatLab- stand for

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MATrix LABoratory

Question 2

MatLab basic data element is

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a matrix (array)

Question 3

It is a powerful language for technical writing It can be used for math computations, modeling and simulations, data analysis and processing, visualization and graphics, and algorithm development

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MatLab

Question 4

4 WINDOWS

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1. Command Window 2. Figure Window 3. Editor Window 4. Help Window

Question 5

it is the MATLAB’s main window, and opens when MATLAB is started.

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Command Window

Question 6

convenient to have as the only visible window

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Command Window

Question 7

Main window, enter variables, runs programs

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Command Window

Question 8

Contains output from graphic command

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Figure Window

Question 9

Creates and debugs script and function files

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Editor Window

Question 10

Provides help information

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Help Window

Question 11

Provides access to tools, demos, and documentation

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Launch Pad Window

Question 12

Logs Commands entered in the Command Window

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Command History Window

Question 13

Provides Information about the variables that are used.

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Workspaces Window

Question 14

Shows the files in the current directory

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Current Directory Window

Question 15

open automatically when graphics commands are executed, and contains graphs created by these commands

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figure windows

Question 16

is used for writing and editing programs. This window is opened from the Desktop menu in the Command Window. It is also used to create function files

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editor window

Question 17

contains help information. This window can be opened from the HELP menu in the toolbar of any MatLab window.

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Help Window

Question 18

is interactive and can be used to obtain information on any feature of MatLab.

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Help Window

Question 19

if a _______ is typed at the end of a command the output of the command is not displayed

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semicolon (;)

Question 20

- Typing ____ is useful when the result is obvious or known, or when output is very large

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semi colon

Question 21

when the symbol ____ is typed in the beginning of a line, the line is designated as a comment

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%

Question 22

when the symbol % is typed in the beginning of a line, the line is designated as a

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comment.

Question 23

are frequently used in programs to add descriptions, or to explain the program

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comment.

Question 24

type ___ and press enter clears the Command Window.

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clc

Question 25

+

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Addition

Question 26

-

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Subtraction

Question 27

*

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Multiplication

Question 28

/

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Right Division

Question 29

\

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Left division

Question 30

Exponentiation

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^

Question 31

ARITHMETIC OPERATION

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1. Addition 2. Subtraction 3. Multiplication 4. Right Division 5. Left division 6. Exponentiation

Question 32

ORDER OF PRECEDENCE

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1. Parentheses. For nested parentheses, the innermost are executed first 2. Exponentiation 3. Multiplication ,division (equal precedence) 4. Addition and Subtraction

Question 33

Fixed-point with 4 decimal digits for: 0.001 < number < 1000 Otherwise display format short e >> 290/7 ans= 41.4286

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format short

Question 34

Fixed-point with 14 decimal digits for: 0.001 < number < 100 Otherwise display format long e >> 290/7 ans= 41.42857142857143

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format long

Question 35

Scientific notation with 4 decimal digits. >> 290/7 ans= 4.1429e+001

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format short e

Question 36

Scientific notation with 15 decimal digits. >> 290/7 ans= 4.142857142857143e+001

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format long e

Question 37

Best of 5-digit fixed or floating point >> 290/7 ans= 41.429

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format short g

Question 38

Best of 15-digit fixed or floating point >> 290/7 ans= 41.4285714285714

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format long g

Question 39

Two decimal digits. >> 290/7 ans= 41.43

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format bank

Question 40

Eliminates empty lines to allow more lines with information displayed on the screen.

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format compact

Question 41

Adds empty lines (opposite of compact)

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format loose

Question 42

Display Format commands:

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1. format short 2. format long 3. format short e 4. format long e 5. format short g 6. format long g 7. format bank 8. format compact 9. format loose

Question 43

is a name made of a letter or a combination of several letters(and digits) that is assigned a numerical value.

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Scalar variables

Question 44

of the assignment operator can include only one variable name.

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the left hand side

Question 45

can be number, or a computable expression that can include numbers and/or variables that were previously assigned numerical values.

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The right hand side

Question 46

RULES ABOUT VARIABLE NAMES

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1. Can be up to 63 characters long
2. Can contain letters, digits, and the underscore character.
3. Must begin with a letter.
4. MATLAB is case sensitive; it distinguishes between uppercase and lowercase letters: For example: AA, Aa, aa, and aA are the names of the four different variables.
5. Avoid using the names of built-in function for a variable

Question 47

a variable that has the value of the last expression that was not assigned to a specific variable

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ans

Question 48

The number л

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pi

Question 49

The smallest difference between two numbers. Equals to 2^ (-52), which is approximately 2.2204e-016.

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eps

Question 50

Used for infinity

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inf

Question 51

Defined as √-1, which is: 0+1.0000i

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i

Question 52

Same as i

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j

Question 53

Stands for a Not-a-Number. Used when MATLAB cannot dtermine a valid numeric value. For example 0/0

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NaN

Question 54

NaN stands for

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Not-a-Number

Question 55

Removes all variables from the memory

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clear

Question 56

Removes only variables x, y and z from the memory

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clear x y z

Question 57

Displays a list of the variables currently in the memory

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who

Question 58

Displays a list of the variables currently in the memory and their size together with information about their bytes and class

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whos

MATLAB

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