# from an array, creating a row vector of elements but one row is in reverse order

6 views (last 30 days)
Christa Weber on 13 Jan 2023
Commented: Steven Lord on 13 Jan 2023
Starting with
>> y=[5 6 7 0 -2; 1 5 6 5 3; -6 -2 0 -3 -5; 0 1 1 6 8]
y =
5 6 7 0 -2
1 5 6 5 3
-6 -2 0 -3 -5
0 1 1 6 8
What is the one-line command to create a 1-by-10 row vector containing the elements of the second row and third row, where the third row has been reversed left-to-right
Steven Lord on 13 Jan 2023
This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.
If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the free MATLAB Onramp tutorial to quickly learn the essentials of MATLAB.

Image Analyst on 13 Jan 2023
If it's not your homework, try this:
y=[5 6 7 0 -2; 1 5 6 5 3; -6 -2 0 -3 -5; 0 1 1 6 8]
y = 4×5
5 6 7 0 -2 1 5 6 5 3 -6 -2 0 -3 -5 0 1 1 6 8
result = [y(2,:), fliplr(y(3,:))]
result = 1×10
1 5 6 5 3 -5 -3 0 -2 -6
If it is your homework and you turn in my code as your own, you could get into trouble if you get caught by your instructor.

Sulaymon Eshkabilov on 13 Jan 2023
Use : and fliplr(). See DOC1 and DOC2.
Christa Weber on 13 Jan 2023
how would I write the command

Sulaymon Eshkabilov on 13 Jan 2023
Eg.:
A = [ 1, 2 3; 4 5 6; 7 8 9]
% Extract Row 1
a1 = A(1,:);
% Extract Row 3
a3 = A(3.:);
% Reverse Row 1
a1 = fliplr(a1)
% Concatenate
B = [a1, a3]
% Now apply these steps with your exercise in one row of command by
% combining these three steps together

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