MATLAB BASIC PROGRAMMING.
QUESTIONS & CORRECTANSWERS.
ALREADY GRADED A+.
- myArray( [3, 4, 5] ) yields the new row array [70, 80, 90]. The indexing array is the
integer array [3, 4, 5].
-myArray( [3:1:5] ) also yields [70, 80, 90]. The double colon operator can be used to
construct the indexing array.
-myArray(3:1:5) yields the same. When constructing a row array using the double colon
operator, the brackets are optional. Omitting the brackets in an assignment statement,
as in myArray = 50:10:90, is discouraged. In contrast, omitting the brackets for the
indexing array is commonplace.
-myArray(3:5) yields the same. The default increment of 1 in the double colon operator
is commonly used when indexing. - ANSFor example, if myArray = [50, 60, 70, 80, 90],
then:
' (transpose operator) - ANSmakes [1,2,3,4] into
[1
2
3
4]
's' - ANSComplete the statement to obtain a string from the user rather than a number.
userName = input('Sally',_____);
" - ANSTwo single quotation marks print a single quotation mark. Note that a single
quotation mark alone would instead indicate the end of the format specification.
( ) parenthesis
~ not
& and
| or
left-to-right - ANSlogical operators order of operation
[0, 0, 1]
& is applied element-wise, yielding [1 & 0, 0 & 0, 1 & 1] = [0, 0, 1] - ANS[1, 0, 1] & [0, 0,
1] yields what new array?
[1, 1, 1, 0] - ANS~[0, 0, 0, 1] yields what new array?
, [3,5;2,4;1,9] - ANSWhat is matrixC after executing the following statement? matrixA =
[ 3, 1, 4; 2, 5, 9 ];
matrixC = reshape( matrixA, 3, 2 )
\\ - ANSTwo backslash characters print one backslash character. Note that a single
backslash character would instead indicate the start of a special character sequence
like \n.
\n - ANSprints a new line
\t - ANSprints a tab
& - ANSboolean &
%-8.2f - ANSFixed-point occupying a minimum of 8 digits, left-aligned, with 2 digits to
the right of the decimal point.
%.4f - ANSFixed-point with 4 digits to the right of the decimal point.
%% - ANSTwo percent characters print one percent character. Note that a single %
character would instead indicate the start of a formatting operator like %f.
%c - ANScharacter
%d - ANSinteger
%e - ANSscientific notation
%E - ANSscientific notation
%f - ANSfixed-point
%G - ANSeither %f or %E whichever is shorter
%g - ANSwither %f or %e whatever is shorter
%i - ANSinteger
%s - ANSstring
| - ANSboolean or
~a or not(a) - ANSNot negates or complements the value of a, returning true if a is false,
and vice versa.
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QUESTIONS & CORRECTANSWERS.
ALREADY GRADED A+.
- myArray( [3, 4, 5] ) yields the new row array [70, 80, 90]. The indexing array is the
integer array [3, 4, 5].
-myArray( [3:1:5] ) also yields [70, 80, 90]. The double colon operator can be used to
construct the indexing array.
-myArray(3:1:5) yields the same. When constructing a row array using the double colon
operator, the brackets are optional. Omitting the brackets in an assignment statement,
as in myArray = 50:10:90, is discouraged. In contrast, omitting the brackets for the
indexing array is commonplace.
-myArray(3:5) yields the same. The default increment of 1 in the double colon operator
is commonly used when indexing. - ANSFor example, if myArray = [50, 60, 70, 80, 90],
then:
' (transpose operator) - ANSmakes [1,2,3,4] into
[1
2
3
4]
's' - ANSComplete the statement to obtain a string from the user rather than a number.
userName = input('Sally',_____);
" - ANSTwo single quotation marks print a single quotation mark. Note that a single
quotation mark alone would instead indicate the end of the format specification.
( ) parenthesis
~ not
& and
| or
left-to-right - ANSlogical operators order of operation
[0, 0, 1]
& is applied element-wise, yielding [1 & 0, 0 & 0, 1 & 1] = [0, 0, 1] - ANS[1, 0, 1] & [0, 0,
1] yields what new array?
[1, 1, 1, 0] - ANS~[0, 0, 0, 1] yields what new array?
, [3,5;2,4;1,9] - ANSWhat is matrixC after executing the following statement? matrixA =
[ 3, 1, 4; 2, 5, 9 ];
matrixC = reshape( matrixA, 3, 2 )
\\ - ANSTwo backslash characters print one backslash character. Note that a single
backslash character would instead indicate the start of a special character sequence
like \n.
\n - ANSprints a new line
\t - ANSprints a tab
& - ANSboolean &
%-8.2f - ANSFixed-point occupying a minimum of 8 digits, left-aligned, with 2 digits to
the right of the decimal point.
%.4f - ANSFixed-point with 4 digits to the right of the decimal point.
%% - ANSTwo percent characters print one percent character. Note that a single %
character would instead indicate the start of a formatting operator like %f.
%c - ANScharacter
%d - ANSinteger
%e - ANSscientific notation
%E - ANSscientific notation
%f - ANSfixed-point
%G - ANSeither %f or %E whichever is shorter
%g - ANSwither %f or %e whatever is shorter
%i - ANSinteger
%s - ANSstring
| - ANSboolean or
~a or not(a) - ANSNot negates or complements the value of a, returning true if a is false,
and vice versa.
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