test mixed signals Matlab problems a 10 6 42 3 4 10 6 82 3 4

test mixed signals

Matlab problems: (a) [10 6 -4]./[2 3 4]= [10 6 -8].\\[2 3 4]= 3.^[2 3 1]= [2 4 -5].^2= (b) Given the array A = [-1 0 5 8; 2 4 7 6; 5 7 3 8], determine: A(:, (13]), A([2 3], [4 1]).

Solution

>> [10 6 -4] ./ [2 3 4]

ans =

5 2 -1

>> [10 6 -8] .\\ [2 3 4]

ans =

0.2000 0.5000 -0.5000

>> 3.^[2 3 1]

ans =

9 27 3

>> [2 4 -5].^2

ans =

4 16 25

>> A = [-1 0 5 8 ; 2 4 7 6 ; 5 7 3 8]

A =

-1 0 5 8
2 4 7 6
5 7 3 8

>> A(:,[1 3])

ans =

-1 5
2 7
5 3

>> A([2 3],[4 1])

ans =

6 2
8 5