Question 1

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> A(2:3,:)

Accepted Answer

The answer of The following matrices have already been defined...

Question 2

What does the following MATLAB function do? log2(x)

Accepted Answer

The log2(x) function in MATLAB returns the value of base-2 logarithm of x.

Question 3

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> length (A)

Accepted Answer

The answer of The following matrices have already been defined...

Question 4

To obtain the coefficients of the second order polynomial that best fits a given set of x and y data, you will type the following sequence of commands:

Accepted Answer

The command "polyfit(x,y,2)" will fit a second order polynomial (i.e. quadratic) to the data in x and y, and return the coefficients of that polynomial. The function will take the x and y values as inputs, followed by the degree of the polynomial to fit (in this case, 2).

Question 5

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> A(:,3)

Accepted Answer

The answer of The following matrices have already been defined...

Question 6

Find the corresponding MATLAB output:
>> factorial(3)
ans =

Accepted Answer

The answer of Find the corresponding MATLAB output:
>> factorial(3)
ans =...

Question 7

Which of the following commands are commonly used while plotting in MATLAB?

Accepted Answer

All three commands (plot, title, and grid) are commonly used while plotting in MATLAB. The plot command is used to create the plot itself, the title command is used to add a title to the plot, and the grid command is used to add a grid to the plot. Thus, choice D, "all of the above," is the best choice.

Question 8

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> B(:,3:4)

Accepted Answer

The answer of The following matrices have already been defined...

Question 9

In the MATLAB Command Window, if you type the following commands, what would be the result?
scores = [80 90 50 70 80 60 65 95 70 40];
for i=1:1:10
if scores (i) >60
fprintf('	 %g 					 PASSING
', scores (i));
else
fprintf('	 %g 					 FAILING
', scores (i))
end
end

Accepted Answer

The answer of In the MATLAB Command Window, if you...

Question 10

In the MATLAB Command Window, if you type the following commands, what would be the result?
scores = [80 90 50 70 80 60 65 95 70 40];
for i=1:1:10
if scores (i) <60
fprintf ('	 %g 					 FAILING
', scores (i))
end
end

Accepted Answer

The answer of In the MATLAB Command Window, if you...

Question 11

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> B(2:3, 2:4)

Accepted Answer

The answer of The following matrices have already been defined...

Question 12

an M-file is used to when you write a program that is more than a few lines long.

Accepted Answer

An M-file is used to write MATLAB programs that can contain multiple lines of code, making it suitable for longer programs.

Question 13

Which of the following MATLAB commands would calculate the value of ex?

Accepted Answer

The function exp(x) calculates the exponential value of x, which is equivalent to e^x.

Question 14

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> max(B)

Accepted Answer

The answer of The following matrices have already been defined...

Question 15

What is the MATLAB command for calculating the square root of a number?

Accepted Answer

The MATLAB command for calculating the square root of a number is sqrt, which is option B. Options A, C, and D are not valid MATLAB commands for calculating the square root of a number.

Question 16

The following matrices have already been defined in MATLAB:  What would be the outputs of the following MATLAB inputs:
->> min(A)

Accepted Answer

The answer of The following matrices have already been defined...

Question 17

Find the corresponding MATLAB output:
>> A = [2,3,4,5;1,-3,-7,4;2,3,2,1];
>> max (A)
ans =

Accepted Answer

The answer of Find the corresponding MATLAB output:
>> A =...

Question 18

What would be the result of the following MATLAB commands?
F1x = sym('x^2-25');
solve(F1x)

Accepted Answer

The answer of What would be the result of the...

Quiz 15: Computational Engineering Tools: Matlab

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> A(2:3,:)

What does the following MATLAB function do? log2(x)

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> length (A)

To obtain the coefficients of the second order polynomial that best fits a given set of x and y data, you will type the following sequence of commands:

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> A(:,3)

Find the corresponding MATLAB output: >> factorial(3) ans =

Which of the following commands are commonly used while plotting in MATLAB?

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> B(:,3:4)

In the MATLAB Command Window, if you type the following commands, what would be the result? scores = [80 90 50 70 80 60 65 95 70 40]; for i=1:1:10 if scores (i) >60 fprintf('\t %g \t\t\t\t\t PASSING\n', scores (i)); else fprintf('\t %g \t\t\t\t\t FAILING\n', scores (i)) end end

In the MATLAB Command Window, if you type the following commands, what would be the result? scores = [80 90 50 70 80 60 65 95 70 40]; for i=1:1:10 if scores (i) <60 fprintf ('\t %g \t\t\t\t\t FAILING\n', scores (i)) end end

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> B(2:3, 2:4)

an M-file is used to when you write a program that is more than a few lines long.

Which of the following MATLAB commands would calculate the value of ex?

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> max(B)

What is the MATLAB command for calculating the square root of a number?

The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs: ->> min(A)

Find the corresponding MATLAB output: >> A = [2,3,4,5;1,-3,-7,4;2,3,2,1]; >> max (A) ans =

What would be the result of the following MATLAB commands? F1x = sym('x^2-25'); solve(F1x)