30 Questions
What does the 'std' function in MATLAB calculate?
Standard deviation
How can you find the standard deviation of each row in a matrix using 'std' in MATLAB?
std(a,2)
What does the 'zeros' function in MATLAB do?
Creates an array with a selected size containing zeros
To create a square sized matrix with zeros using 'zeros' in MATLAB, what syntax should be used?
zeros(a,a)
'rand' function in MATLAB generates random values ranging between which range?
0 and 1
How does the 'ones' function in MATLAB differ from the 'zeros' function?
'ones' creates arrays with only ones instead of zeros.
Which function is used in MATLAB to generate a square-sized matrix with random values between 0 and 1?
rand(a,a)
To generate a single random integer ranging between 10 to 20 in MATLAB, which function should be used?
randi([10,20])
Which MATLAB function creates a vector with elements linearly spaced between specified values?
linspace(start, end, size)
What does the 'rand(1)' function in MATLAB do?
Generates a scalar with a random value between 0 and 1
How is the 'randi([5,10],3,2)' MATLAB function interpreted?
Generating a 3x2 matrix with integers between 5 and 10
In MATLAB, how is the 'linspace(1,10,5)' function used?
Creating a vector with elements linearly spaced from 1 to 10
What does the 'sort' function do in MATLAB?
Sorts elements of a variable in ascending or descending order
How can you use the 'sort' function to sort values in each column of a matrix?
sort(a,1,'ascend')
What does the 'disp' function do in MATLAB?
Displays all the elements in an existing variable
How can you use the 'disp' function to display the elements of a variable named 'b'?
disp(b)
'roots' function in MATLAB is primarily used for finding:
Roots of a polynomial function
'save' function in MATLAB is primarily used for:
Storing variables defined in the current workspace
What is the correct way to find the cosine of a variable named (a) in MATLAB?
cos(a)
Which function in MATLAB finds the hyperbolic sine value of a scalar or all elements of an array?
sinh(a)
What range should the input value be in to use the 'acos' function in MATLAB?
-1 to 1
Which function in MATLAB finds the tangent value of a scalar or all elements of an array?
tan(a)
What is the correct way to find the arc-tangent of a variable named (a) in MATLAB?
atan(a)
For the 'atan' function in MATLAB, what is the range of the output value for any real number input?
-π/2 to π/2
What does the 'sum' function do when used after checking a logical condition in MATLAB?
Counts the number of elements that satisfy the set condition
In MATLAB, what does the command 'sum(sum(a>0))' calculate?
Total number of positive numbers in array a
How can you find the position of the number 6 in a variable named 'a' in MATLAB?
find(a==6)
What does the command 'sum(sum(a>1 & a>mean(a(find(a>0))))' calculate in MATLAB?
Number of elements in a larger than 1 and greater than the mean of positive elements
How can you calculate the percentage of positive numbers in a variable named 'a' in MATLAB?
(sum(sum(a>0))/numel(a))*100
What is the purpose of the command 'linspace(1,10,10)' in MATLAB?
Generate a vector from 1 to 10 with 10 evenly spaced elements
Test your knowledge on calculating standard deviation using the 'std' function in MATLAB. This quiz covers finding standard deviation for vectors, matrices, and specific rows or columns.
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