chapter 2

Question 1

variable

Answer 1

holds an item, item can be changed but must be defined before running calculations

Question 2

interpreter

Answer 2

negotiates with computing system to allocate memory location for new variable

Question 3

assignment operator

Answer 3

= sign

Question 4

base workspace

Answer 4

stores variables created at command line

Question 5

identifier

Answer 5

variable’s name
- start w/ letter
- case sensitive
- no spaces

Question 6

keywords that CANT BE USED AS IDENTIFIER

Answer 6

break
case
catch
otherwise
parlor
classdef
continue
else
return
spmd
etc

Question 7

camel case

Answer 7

capitalizing first letter of each word

Question 8

data type

Answer 8

specific class each MatLab variable has that indicates type of data

Question 9

numeric variable

Answer 9

stores number

Question 10

integer number

Answer 10

positive or negative number that isn’t a decimal
- useful when counting finite items
- used when creating/assessing array

Question 11

array

Answer 11

collection of variables
- stored with 1, 2, 4, 8 bytes

Question 12

signed value

Answer 12

positive and negative integers

Question 13

unsigned value

Answer 13

only positive integers

Question 14

real number

Answer 14

positive or negative number that may have decimal (Matlab default)

Question 15

range

Answer 15

indication of numbers that can be represented smallest to largest

Question 16

unsigned 8bit range

Answer 16

0 to 255

Question 17

signed 8bit range

Answer 17

-127 to 128

Question 18

int

Answer 18

signed integer

Question 19

uint

Answer 19

unsigned integer

Question 20

int8

Answer 20

signed integer in 8 bits

Question 21

floating point numbers

Answer 21

another name for real numbers (have decimal)

Question 22

normalized scientific notation

Answer 22

scientific notation with one number before the decimal point

Question 23

double percision

Answer 23

68 bit representation of floating point (STANDARD)

Question 24

single percision

Answer 24

38 bit representation of floating point

Question 25

RealMax

Answer 25

constant that gives largest number in MatLab

Question 26

RealMin

Answer 26

constant that gives smallest number in MatLab

Question 27

literal constant

Answer 27

that appears in statement

Question 28

INF

Answer 28

infinity, too big for matlab

Question 29

-INF

Answer 29

negative infinity, too small for Matlab

Question 30

MatLab Default

Answer 30

double precision and real numbers

Question 31

complex numbers

Answer 31

have real and imaginary part (I and j) I^2 = -1 j^2 = -1 j is preferred

Question 32

expression

Answer 32

combination of variables, constants, and operators

Question 33

precedence rule

Answer 33

operations are done in order they were written

Question 34

continuation

Answer 34

" ... " is used when expression is too long and is continues on next line

Question 35

scalar

Answer 35

single number

Question 36

scalar variable

Answer 36

variable that holds one number

Question 37

mathematical constants

Answer 37

variable with predefined constant (ex: pi)

Question 38

NaN

Answer 38

not a number (ex: 0/0)

Question 39

overflow

Answer 39

result exceeds max value that can be stored within a variable

Question 40

up arrow key

Answer 40

retrieve previous commands (executes code multiple times, repeat)

Question 41

string scalars

Answer 41

stores text in variable with " "

Question 42

ASCII Standard

Answer 42

used to encode letters to bits (characters have # equivalent)

Question 43

character

Answer 43

' '

Question 44

string

Answer 44

" "

Question 45

accuracy

Answer 45

how close floating point rep is to desired value determined by # of bits used, larger is more accurate

Question 46

rounding error

Answer 46

difference between calculated estimate of number and actual value estimate - actual

Question 47

truncation error

Answer 47

when least significant digits to right of decimal are discarded

Question 48

absolute error

Answer 48

measure of accuracy, difference between calculated value and actual value calc value - actual value can be found with eps(number)

Question 49

relative error

Answer 49

measure of accuracy calc value - actual value / actual value

Question 50

experimental error

Answer 50

measure of accuracy using double precision floating point rep. relative accuracy won't exceed eps(1)

Question 51

rounding error VS experimental error

Answer 51

rounding error = finite precision on calculations experimental error = limited accuracy of measurement

Question 52

MatLab binary format

Answer 52

place to save and load variables

Question 53

save variables into current workspace

Answer 53

save("fileName")

Question 54

save all variables into file w/ name

Answer 54

save("fileName.mat")

Question 55

save select variables

Answer 55

save("fileName", "var1", "var2")

Question 56

load variable from Matlab file

Answer 56

load("fileName")

Question 57

wizards

Answer 57

sequence of interactive steps that eases use of specific software features used to import data from variety of file types