EGR 1400 EXAM 3 2025 QUESTIONS AND
ANSWERS
Table - ANS A rectangular array of data
script file - ANS a sequence of MATLAB commands also called
program (also called M-files)
- Must begin with a letter
- Can be up to 63 characters long (31 in MATLAB 6)
- Can contain letters, digits, and the underscore characters - MATLAB is case sensitive
- No space is allowed
- No use of built-in functions - ANS Rules about variable names:
Array - ANS a fundamental form that MATLAB uses to store and manipulate data
An array - ANS a list of numbers arranged in rows and/or columns
characters (strings) - ANS In addition to arrays of numbers, arrays in MATLAB can be made of
a list of
True - ANS Tables can be usually converted to arrays
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,True - ANS In MATLAB a vector is created by assigning the elements of the vector to a
variable
- By known list of numbers (row, column) or functions
- By specifying the first, the spacing, and the last term (with or without brackets, forward and
backward)
- By specifying the first and last terms, and the number of terms (linspace command) -
ANS Creating a vector can be done in several ways:
False - ANS The rule in creating a matrix is that some of the rows must have the same
number of elements
- By known list of numbers (row, column) or functions
- By specifying the first, the spacing, and the last term
- By specifying the first and last terms, and the number of terms (linspace command) -
ANS Creating a matrix can be done in several ways:
False - ANS Not all variables in MATLAB are arrays
• Vector:v(:);v(m:n)
• Matrix:A(:,n);A(n,:);A(:,m:n);A(m:n,:);A(m:n,p:q) - ANS Using a colon to address a range of
elements in vector or matrix
True - ANS Adding an element which is beyond the size of a matrix, similar as in vector case,
will result in added zeros
length(A), size(A), reshape(A, m, n), diag(v), diag(A) - ANS Built-in functions for handling
arrays
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, String - ANS an array of characters
True - ANS Strings use single quotes, and can include letters, digits, other symbols and space
in MATLAB
- Output commands to display text messages
- Formatting commands of plots
- Input arguments of some functions - ANS Use of strings in MATLAB:
True - ANS We can modify a string, by accessing one character or a set of characters within
the original string
False - ANS Strings can't be stored in a matrix
True - ANS Strings can also be stored in a matrix
Info = char('Student Name:','John Smith','Grade:','A') - ANS Built-infunction char:
False - ANS A string made up of the digits is the same as the number itself
True - ANS A string made up of the digits is different than the number itself
field - ANS Each column of the table, called a _____ contains the same type of information
record - ANS Each row, called a _____, contains all the information about one entry in the
table
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ANSWERS
Table - ANS A rectangular array of data
script file - ANS a sequence of MATLAB commands also called
program (also called M-files)
- Must begin with a letter
- Can be up to 63 characters long (31 in MATLAB 6)
- Can contain letters, digits, and the underscore characters - MATLAB is case sensitive
- No space is allowed
- No use of built-in functions - ANS Rules about variable names:
Array - ANS a fundamental form that MATLAB uses to store and manipulate data
An array - ANS a list of numbers arranged in rows and/or columns
characters (strings) - ANS In addition to arrays of numbers, arrays in MATLAB can be made of
a list of
True - ANS Tables can be usually converted to arrays
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 1
,True - ANS In MATLAB a vector is created by assigning the elements of the vector to a
variable
- By known list of numbers (row, column) or functions
- By specifying the first, the spacing, and the last term (with or without brackets, forward and
backward)
- By specifying the first and last terms, and the number of terms (linspace command) -
ANS Creating a vector can be done in several ways:
False - ANS The rule in creating a matrix is that some of the rows must have the same
number of elements
- By known list of numbers (row, column) or functions
- By specifying the first, the spacing, and the last term
- By specifying the first and last terms, and the number of terms (linspace command) -
ANS Creating a matrix can be done in several ways:
False - ANS Not all variables in MATLAB are arrays
• Vector:v(:);v(m:n)
• Matrix:A(:,n);A(n,:);A(:,m:n);A(m:n,:);A(m:n,p:q) - ANS Using a colon to address a range of
elements in vector or matrix
True - ANS Adding an element which is beyond the size of a matrix, similar as in vector case,
will result in added zeros
length(A), size(A), reshape(A, m, n), diag(v), diag(A) - ANS Built-in functions for handling
arrays
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 2
, String - ANS an array of characters
True - ANS Strings use single quotes, and can include letters, digits, other symbols and space
in MATLAB
- Output commands to display text messages
- Formatting commands of plots
- Input arguments of some functions - ANS Use of strings in MATLAB:
True - ANS We can modify a string, by accessing one character or a set of characters within
the original string
False - ANS Strings can't be stored in a matrix
True - ANS Strings can also be stored in a matrix
Info = char('Student Name:','John Smith','Grade:','A') - ANS Built-infunction char:
False - ANS A string made up of the digits is the same as the number itself
True - ANS A string made up of the digits is different than the number itself
field - ANS Each column of the table, called a _____ contains the same type of information
record - ANS Each row, called a _____, contains all the information about one entry in the
table
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