![Yes or No. Circle them or mark Yes No Given A = eye(4) and B = ones(3), can we perform A+B? Yes No Given A = (2 5 6; 4 1 -4]](http://img.homeworklib.com/questions/3c7ed560-08f8-11eb-985c-f1b39303406b.png?x-oss-process=image/resize,w_560)
Homework Answers
Solution:
Two matrices are added when the size of the matricesare equal.
For A = eye(4) It is a 4x4 matrix.
For B = ones(3) It is a 3x3 matrix
>> A=eye(4)
A =
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
>> B=ones(3)
B =
1 1 1
1 1 1
1 1 1
>> A+B
Matrix dimensions must agree.
No - We can not perform A+B.
-------------------------------------------------------------
A =
2 5 6
4 1 -4
>> B=[-2 3;4 7;1 0]
B =
-2 3
4 7
1 0
>> A*B
ans =
22 41
-8 19
We can perform A*B because the dimension of A is 2x3 and dimension of B is 3x2 and the resultant matrix = 2x2.
YES - We can perform A*B.
----------------------------------------------------
Inmatla all comments are preceded by %
No - All comments are preceded by $
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YES - In matlab, semicolon is used to supress the outut.
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No- In matlab, semicolon is used to indicate end of the column.
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NO- subplot(2,2,5) is not a valid command because the index 5 exceeds the number 2x2 =4
---------------------------------------------------
No- x6 is the invalid command
---------------------------------------------------------
To compare matrices, the two should be the same size.
No
-----------------------------------------------------
YES - in arraycomparision, the answer is either 0 or 1.
---------------------------------------------------
No- In matlab, it is required tindicate the data array.
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*****CONSTANT*****
NUM_MONTHS = 12;
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LAST_YEAR = 2016;
%*****INPUT*****
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% read data file
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% OR load lake_powell.txt
% print with title and year column headings.
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fprintf('\n')
% print contents of lake_powell
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