Which command in matlab is to delete all the variables

Assignment Help Civil Engineering

Reference no: EM13550306

1. If b is a matrix that is 12 rows by 8 columns then, we execute this command in MATLABb = b' then the size of b is

a. 12x12

b. 8x8

c. 8x12

d. 12x8

2. If MATLAB displays a =1.0110e+002, then Answer

a. a = 10.11

b. a = 1011

c. a = 1.011

d. a = 101.1

3. If a = e5, how would enter it in MATLAB?

a. a = 1e5

b. a = e^5

c. a = e5

d. a = exp(5)

4. What is the value for 60o in radians? If "format long" is used before displaying the result.

a. 1.05

b. 1.047197551196598

c. 1.047197551

d. 1.0472

5. Arrange the steps to solve problems in engineering and science (a-e)

State the Problem

Describe the input and output

Develop an algorithm

Solve the problem

Test the solution

6. Which of the following commands can be executed in MATLAB, if the variables m and c are defined prior to the command you select? Select all that may apply.

a. E = m*c*c

b. E = m*c^2

c. E = M*c2

d. E = mc^2

e. E = mc2

f. E = m*C^2

7. "ans" variable can be ONLY scalar value.

True False

8. Arrange the order of calculations perfomred in MATLAB.(a-d)

Parentheses first

Exponentiation

Multiplication / division

Addition / subtraction

9. If you want to compute 8 + 12, then multiply the result by 5, which command would you use in MATLAB?

a. (8+12)*5

b. (8+12]*5

c. [8+12]*5

d. {8+12}*5

10. If "b" is defined in MATLAB as:b = 1.0e+003 * Columns 1 through 7 0.1040 0.2080 0.3120 0.4161 0.5201 0.6241 0.7281 Columns 8 through 10 0.8321 0.9361 1.0402

What is b(7)?

a. 7.281

b. 0.7281

c. 728.1

d. 72.81

11. You can't use MATLAB on the Cloud in research and commercial applications.

True False

12. A vector is defined in MATLAB the same as is defined in Algebra.

True False

13. You can name a variable "ans" that you will be using later in other computations.

True False

14. Which of the following results in 1000?

a. e3

b. 1e3

c. 1*e3

d. 10exp(3)

15. How many elements are in variable A, if A = linespace(15,100,35)?

a. A is not defined

b. 1

c. 100

d. 35

16. If the size of b is shown on the workspace menu for MATLAB as 4x4, what type of variable b is?

a. Vector

b. 4-D matrix

c. 2-D matrix

d. Scalar

17. If we have the following commends in MATLAB:x = 10Range = [x:x/25:2*x],How many elements are stored in Range?

a. 25

b. 26

c. 20

d. 10

18. Which commend in MATLAB is used to list variables and their sizes?

a. variablesize

b. varsize

c. who

d. whos

19. It is not possible in MATLAB to generate 3-D arrays.

True False

20. Which command in MATLAB is to delete all the variables stored in the workspace?

a. clc

b. clear

c. cls

d. delete all

21. If you want to save data stored in workspace in MATLAB into a file name mydata.dat, which commend(s) do you use?

a. save workspace mydata.dat

b. save variables mydata.dat

c. save all mydata.dat

d. save mydata.dat

22. If variable Test(i,j) is selected so the first column represents the student number (1,2,..., 32), 2nd column represents the score of the first homework, 3rd column represents the score of the 2nd homework, etc. If there is a total of 6 homework for this class, what is the size of Test?

a. (32,6)

b. (32,7)

c. (6,32)

d. (7,32

Reference no: EM13550306

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