Question

How is Problem 1 (a through e) typed up in Matlab? I would like to know how the commands is typed up along with solution please.

Assignment 6 Problem 1) Consider the two following matrix, 1 4 2 2 4 100 and B In(A) 7 9 7 3 42 a) Select just the second row of B. b) Evaluate the sum of the second row of B. c) Multiply the second column of B and the first column of A element by element. d) Evaluate the maximum value in the vector resulting from element by element multiplication of the second column of B with the first column of A. e) Use element by element division to divide the first row of A by the first three elements of the third column of B. Evaluate the sum of the elements of the resulting vector.

Answer 1

a)

code:

A=[1,4,2;2,4,100;7,9,7;3,pi,42];
B=log(A)
B(2,:)

codingground ExECUTE MATLABIOCTA VE ON LINE New Project 20170224 +Execute Share Code demo.m x root 1 A-[1,4,2;2,4,10e;7,9,7;3,pi,42]; 2 B-log(A) 3 B (2, Default Term +Browser demo.m at line 1 column 2 sh-4.3$ octave -qf --no-window-system demo.m octave: X11 DISPLAY environment variable not set octave: disabling GUI features 0.00000 1.38629 0.69315 0.69315 1.38629 4.60517 1.94591 2.19722 1.94591 1.09861 1.14473 3.73767 ans 0.69315 1.38629 4.60517 sh-4.3$I

b)

code:

A=[1,4,2;2,4,100;7,9,7;3,pi,42];
B=log(A)
sum(B(2,:))

codingground ExECUTE MATLA BIOCTAVE ON LINE *New Project-201 70224 囧다+《 :q, Execute!! > Share Code demo.mx root 1 A-1,4,2;2,4,100;7,9,7;3,pi,42]; 2 B-log(A) 3 sum (B(2,:)) demo.m Default Term +Browser sh-4.3 octave -qf --no-window-system demo.m octave: X11 DISPLAY environment variable not set octave: disabling GUI features warning: function/demo.m shadows a core library function 0.00000 1.38629 0.69315 0.69315 1.38629 4.60517 1.94591 2.19722 1.94591 1.09861 1.14473 3.73767 ans6.6846 sh-4.3$

c)

code

A=[1,4,2;2,4,100;7,9,7;3,pi,42];
B=log(A)
B(:,2).*A(:,1)

codingground ExECUTE MATLABIOC TA VE ONLIN E * New Project-20170224 + « q, Execute l > Share Code demo.m x ト[1,4, 2; 2, 4, 100,7,9, 7; 3, pi ,421; B=log(A) root 1 2 demo.m Default Term + Browser octave: disabling GUI features aringuction . /demo.n shadows a core 11brary function 0.00000 1.38629 0.69315 0.69315 1.38629 4.60517 1.94591 2.19722 1.94591 1.09861 1.14473 3.73767 ans 1.3863 2.7726 15.3806 3.4342 sh-4.3$

d)

code

A=[1,4,2;2,4,100;7,9,7;3,pi,42];
B=log(A)
max(B(:,2).*A(:,1))

codingground ExECUTE MATLA BIOCTAVE ONLIN E * New Project-20170224囧ㅁ + « 웜 Execute l > Share Code demo.m x h= [1,4,2,2,4, 100 ; 7, 9, 7; 3,pi,42]; B-log (A) max(B(,2). *A(:,1)) root 1 2 3 demo.m Default Term +Browser sh-4.3$ octave -qf -no-window-system demo.m ctave: X11 DISPLAY environment variable not set ctave: disabling GUI features arning: function -/demo.m shadows a core library function 0.00000 1.38629 0.69315 0.69315 1.38629 4.60517 1.94591 2.19722 1.94591 1.09861 1.14473 3.73767 ans= 15.381 sh-4.3$