How to flip only some rows inside a matrix?

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Muniba Shah
Muniba Shah 2018-10-27
评论： madhan ravi 2018-10-31
hey all, if i have vector
A=[2 5 6 7 8 9]
i need it to become a matrix
A=[2 9;
5 8;
7 6]
any suggestions?
  1 个评论
the cyclist
the cyclist 2018-10-27
I don't understand the general rule for going from the vector to the matrix. Can you describe it?

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采纳的回答

madhan ravi
madhan ravi 2018-10-27
A=[2 5 6 7 8 9]
a=fliplr(reshape(A,[3 2]))
a([3 1])= a([1 3])
a=fliplr([a(1:2,:);flip(a(3,:))])

更多回答（2 个）

Abdul Rehman
Abdul Rehman 2018-10-27
编辑：Abdul Rehman 2018-10-27
i have got Answer for you but its not generic for all matrix.you should look for the end and first element of matrix.
Hopefully it's work for you...
if true
A=[2 5 6 7 8 9];
b=(size(A));
[r c]=size(A);
j=1;
gg=c;
for u=c:-1:c-1 %two iteration for size of vector.
if(j==1)
b(j)=A(j); % first value at start
end
if(gg==c)
b(gg)=A(gg/2); %Size of vector divided by 2 center value at end
end
j=j+1;
b(j)=A(u);
b(j+1)=A(j);
j=j+1;
end
b=reshape(b,[2 3])
end
Here Answer:
Muniba Shah
Muniba Shah 2018-10-31
A = [2 5 6 7 8 9]; B = reshape(A,[3,2]); C=flipud(B(:,2)); B(:,2)=C; D=fliplr(B(3,:)); B(3,:)=D

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