First Year

Question 1

x = sum (y)

Answer 1

sums the vector y or will sum the values in each column

Question 2

x = abs (y)

Answer 2

returns the absolute value of y

Question 3

x = sign (y)

Answer 3

will create a random number

Question 4

[max, ind] = max (y)

Answer 4

will return the maximum value of and the index. if it is a matrix the max value of each column will appear

Question 5

For angles which convention is used?

Answer 5

Radians

Question 6

format for a for loop

Answer 6

for variable = index_values
»code statement referencing index
» end

Question 7

format for a while loop

Answer 7

> > while (expression)
statements
end

Question 8

Break function

Answer 8

Jumps out of the loop

Question 9

Continue Function

Answer 9

goes back to the start of the loop and executes the next iteration without running the remaining code

Question 10

Return Function

Answer 10

Will return the currently running code

Question 11

Which function takes precedence in and/or

Answer 11

and takes precedence so bracketing can be used to manually set the order

Question 12

Indexing formats

Answer 12

CSV is zero
MATLAB is one index
DLM is one index

Question 13

format for saving a text file

Answer 13

> > save (‘mydata.txt’, ‘-ascii’)

Question 14

Load command format and use

Answer 14

> > load mydata.mat variable 1
where:
mydata is the filename
variable 1 is what wants to be retrieved

Question 15

Whats the import wizard used for?

Answer 15

To import a variety of files including images

Question 16

What is different for the format of how string values are coded

Answer 16

Curly brackets must be used

Question 17

format for a User Defined Function

Answer 17

> > function y = function name (x)
%comments describing what the function does
code for function

where
y is the output
x is the input argument/s
and the file name should be the same as the function name

Question 18

How to create a vector of length 10 starting at 2 with an increment value of 6

Answer 18

> > v = linespace (2,6,10)

Question 19

What does &raquo_space; if a>=b ¦ c ~= b mean in words

Answer 19

is a id bigger or equal to b or c is not equal to b

Question 20

Under which conditions do logical and relation operators return 1 and 0’s

Answer 20

when they are used outside for and while loops

Question 21

How do double operators work with scalars

Answer 21

in a&&b if a is false then b isn’t seen to

or a¦¦b if a is true b isn’t evaluated

Question 22

format for csv read

Answer 22

> > variable = csvread (‘file.csv’ R,C,[R1,C1,R2,C2])
R,C is the index of where the file wants to be read from
R2, C2 is where the read function wants to be ended

Question 23

Why are user defined functions used?

Answer 23

Portability
Readability
Reliability

Question 24

What does a red error bar mean?

Answer 24

it signifies an actual error, meaning the function will not run

Question 25

what is fprintf used for?

Answer 25

to write to a file or to the command window

Question 26

what is sprintf used for?

Answer 26

to create a string variable

Question 27

What cannot be called from the command window

Answer 27

sub functions as they are in a user defined function and do not have the same file name as the function meaning the command window cannot find them