MATLAB

Question 1

Loops

Answer 1

cause specific code to repeat

Question 2

ans

Answer 2

stores the result of an expression

Question 3

roots(x)

Answer 3

roots of a polynomial

Question 4

isinf(a)

Answer 4

returns 1 for infinite

Question 5

ischar(a)

Answer 5

returns 1 for character

Question 6

clf

Answer 6

clears figure window

Question 7

subplot(m,n,p)

Answer 7

displays several plots in the same figure window

Question 8

plot3(x,y,z)

Answer 8

plots function of two independent variables x and y

Question 9

hold on

Answer 9

freezes the current plot for subsequent graphics command

Question 10

branches

Answer 10

selects specific sections of code to execute

Question 11

isnan(a)

Answer 11

returns 1 for not a number

Question 12

any(a)

Answer 12

returns 1 if any elements do not equal 0

Question 13

ones(n,m)

Answer 13

creates an n x m array of ones

Question 14

ones(n)

Answer 14

creates an n x n array of ones

Question 15

zeros(n,m)

Answer 15

creates an n x m array of zeros

Question 16

zeros(n)

Answer 16

creates an n x n array of zeros

Question 17

length(arr)

Answer 17

returns the length of a vector or longest dimension

Question 18

load

Answer 18

loads file into workspace

Question 19

!

Answer 19

embeds operating system commands directly into program

Question 20

plot(x,y)

Answer 20

plots x and y versus each other

Question 21

semilogx(x,y)

Answer 21

plots x on a logarithmic axis

Question 22

semilogy(x,y)

Answer 22

plots y on a logarithmic axis

Question 23

bar(x,y)

Answer 23

creates a bar chart

Question 24

polar(theta,r)

Answer 24

polar plot

Question 25

clc

Answer 25

clears command window

Question 26

switch statement from

Answer 26

switches input expression

Question 27

switch constant

Answer 27

code is executed based on the value of a single integer, character, of logical expression

Question 28

logical(a)

Answer 28

converts numerical values to logical values (T/F)

Question 29

all(a)

Answer 29

returns 1 if all elements are not equal to zero

Question 30

isnumeric(a)

Answer 30

returns 1 for numeric array

Question 31

isempy(a)

Answer 31

returns 1 for empty array

Question 32

xor

Answer 32

exclusive OR

Question 33

polyval(a,x)

Answer 33

evaluates a polynomial at specific values of its independent variable x

Question 34

poly(x)

Answer 34

coefficients of the polynomial whose roots are specified by the array x

Question 35

conv(a,b)

Answer 35

computes the product of two polynomials described by the coefficient of arrays a and b

Question 36

\n

Answer 36

skip a line

Question 37

fplot(y,[xmin x max])

Answer 37

automatically analyzes the functions and sets the plotting points so all features of the function are shown

Question 38

plot(x,polyval(a,x))

Answer 38

plots the polynomial at specified values of the independent variable

Question 39

eye(n,m)

Answer 39

creates an n x m identity matrix

Question 40

eye(n)

Answer 40

creates an n x n identity matrix

Question 41

size(arr)

Answer 41

returns number of rows and columns in array

Question 42

save

Answer 42

saves data in workspace to a file

Question 43

clear

Answer 43

clears variables in workspace