MATLAB Answers

0

Please read the instructions and give the correct expression

Asked by Santos Solpos on 19 Nov 2019 at 9:40
Latest activity Commented on by Walter Roberson
on 21 Nov 2019 at 9:00
You need to solve and give the correct matlab expression and result
A= C= E=
1 2 3 4 16 2 3 13 1 0 0 0
6 8 1 5 5 11 10 8 0 1 0 0
9 4 2 7 9 7 6 12 0 0 0 1
9 4 7 2 4 14 15 1 1 0 0 0
B= D= F=
1 1 1 1 1 0 0 0 3 6 9 12
1 1 1 1 0 3 0 0 18 24 3 15
1 1 1 1 0 0 5 0 27 12 6 21
1 1 1 1 0 0 0 7 27 12 21 6
Question
  1. Create this matrix from the given matrices in Part V. (Use matrix shortcuts). Write the Matlab expression and Result.
T=
1 2 3 4 2 2 2 2 4 3 3 3
6 8 1 5 2 2 2 2 3 4 3 3
9 4 2 7 2 2 2 2 3 3 3 4
9 4 7 2 2 2 2 2 4 3 3 3
1 4 7 10 16 2 3 13 1 0 0 0
16 22 1 13 5 11 10 8 0 3 0 0
25 10 4 19 9 7 6 12 0 0 5 0
25 10 19 4 4 14 15 1 0 0 0 7

  5 Comments

Can you give me a hint
Look at the top right corner of T, the part starting from 1 2 3 4 . Look at that 4 x 4 block. Now look at your variables. Do you see that same 4 x 4 block in any of your variables?

Sign in to comment.

3 Answers

Answer by Santos Solpos on 21 Nov 2019 at 8:31
 Accepted Answer

Hello Sir David Hill
Can you check my answers? I attached pdf of my answers to matlab problems. I am hoping that you will give a comment.

  1 Comment

The division questions are ambiguous B/2C can be interpreted as B/2*C or as B/(2*C) depending on the context and the font.
AB can be either matrix multiplication * or element-by-element multiplication .* which are different operators.
B/C can be either matrix division / or element-by-element division ./

Sign in to comment.


Answer by David Hill on 19 Nov 2019 at 12:05

Hint
T=[A,2*B,3*B+E;F-2*B,C,D];

  1 Comment

If a problem sounds like a homework assignment (which this absolutely does), please don't simply provide the answer! [The more work the student shows the more generous I would be with hints; if they'd posted what you did except wrote F+2*B instead of F-2*B I'd just go ahead and fix it for them.]
A hint would have been a pointer to some of the introductory documentation, like the Matrices and Arrays section of the Getting Started with MATLAB chapter.

Sign in to comment.


Answer by Santos Solpos on 21 Nov 2019 at 1:17

Hello David Hill
I tried using blkdiag. Is it correct?

  2 Comments

I gave you the answer.
It would be possible to use blkdiag() in a solution, but the rest of the solution would mostly consist of working around the fact that you had used blkdiag()

Sign in to comment.