Directions: Write the numeric result of the MATLAB expression. These may be enti
ID: 3577600 • Letter: D
Question
Directions: Write the numeric result of the MATLAB expression. These may be entire vectors or matrices. Given d = [6 8 3 1 7 4] What are the result of the following MATLAB expressions? d(3) d(2:5) _ d(5: end) _ given x = [1 2 3; 4 5 6; 7 8 9; 10 11 12] what are the results of the following MATLAB expression? x(1, 2) x(3, 3) _ x(2:3, 1:2) x(3, :) _ Given v = [12 9 6 3 0] sum(v) mean(v) _ min(v) _ prod(v) Find the result of the following MATLAB expressions: 2 * [2 3 2] [1 2; 3 4] + [1 2; 1 2] [3 2] * [4 1] ______Explanation / Answer
(46)
d is vector with six elements. Index stars from 1 to 6
(a) d(3) -> Fetches the element at index 3 which is 3
(b) d(2:5) -> Fetches elements starting from index 2 to index 5, results in 8 3 1 7
(c) d(5:end) -> Fetches elements starting from index 5 to till end index, results in 7 4
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(47)
x is a matrix of dimension 4 X 3 (Four rows and Three columns)
(a) x(1,2) fetches the element present present at row 1, column 2. Results in 2
(b) x(3,3) fetches the element present present at row 3, column 3. Results in 9
(a) x(2:3,1:2) fetches the elements present present at rows 2 and 3, columns 1, 2.
Results in
4 5
7 8
(a) x(3,:) fetches the element present present at row 3.
Results in
7 8 9
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(48)
v is a vector of five values
(a) sum(v) will returns the sum of all elements in the vector. Output: 30
(b) mean(v) will returns the average( sumOfElements / numberOfElements = 30/5) of all elements in the vector. Output: 6
(c) min(v) will returns the minimum of all elements in the vector. Output: 0
(d) prod(v) will returns the product of all elements in the vector. Output: 0
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(49)
(a) 2 * [2 3 2]
Multiplies every element of vector with 2.
Output: [4 6 4]
(b) [1 2; 3 4] + [1 2; 1 2]
Adds two 2x2 matrices (Adds elements at corresponding indices) and results in another 2x2 matrix.
Result: [2 4; 4 6]
Output:
2 4
4 6
(c) [3 2] .* [4 1]
Multiplies the elements at corresponding indices.
Output: 12 2
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