ENGG100 - MATLAB Fundamentals

who

lists all variables in workspace

whos

lists all variables in workspace, with sizes and types

ans

returns most recent answer

byte

amount of computer memory required for one character

8

1 byte is equivalent to __ bits (how many?)

1×1

size of a scalar variable

double

This variable class means that the variable holds numeric values as double-precision floating point

floating-point

It means the computer can represent numbers with decimal/fractional parts and across a huge range of sizes

Array Editor

With this tool, you can view and even change the values of workspace variables

Integers

A fundamental MATLAB data type with examples:

• int8 / uint8

• int16 / uint16

• int32 / uint32

• int64 / uint64

floating point numbers

A fundamental MATLAB data type with examples:

• single

• double

double

what is the default variable type for numeric variables?

32 bits / 4 bytes

number of bits/bytes in a single variable type

64 bits / 8 bytes

number of bits/bytes in a double variable type

Complex Numbers

A fundamental MATLAB data type with examples:

• double for real part

• double for imaginary part

Characters

A fundamental MATLAB data type with examples:

• ‘a’

• ‘b’

• ‘c’

Strings

A fundamental MATLAB data type with examples:

• “Hello”

• “Konnichiwa”

• “Kamusta”

Vector

a special type of matrix, having only one row or one column

lists or arrays

Vectors are called ____ or ____ in other programming languages

vector

generally refers to the one-dimensional (1D) array form

matrix

generally refers to the two-dimensional (2D) array form

linspace

This function can be used to initialize a vector of equally spaced values (evenly spaced by addition)

logspace

This function can be used to generate logarithmically spaced data (evenly spaced by multiplication)

logspace

This function produces a set of points with an interval between them that increases linearly with y

Apostrophe (‘)

The symbol that is often used in MATLAB to indicate the transpose

Matrix

it may be thought of as a table consisting of rows and columns

16

On computers using standard floating-point arithmetic, numbers are represented to approximately how many significant decimal digits?

eps

The relative accuracy of numbers is given by this function, which is defined as the distance between 1.0 and the next largest floating-point number.

converted to double precision using the double function

Before mathematical operations can be performed on such types, they must be _____________.

both vectors must be the same size

When array operations are applied to two vectors, what condition must be met?

sum(a .* b)

What statement/code will find the scalar product (dot product) of a and b?

expression

It is a formula consisting of variables, numbers, operators, and function names.

statements

they are frequently of the form:

variable = expression

as in:

s=u t-g/2 t .^ 2;