HOW TO ACCESS THE FOLLOWING ELEMENTS FROM THE GIVEN ARRAY
1 view (last 30 days)
Show older comments
a=
0 0 0.3013 1.1305
1.0000 2.0000 0.7390 0.4223
3.0000 2.0000 1.1305 -0.2111
I need
A1=[[a(1,1) a(2,1) a(1,3) a(2,3)]' [a(1,2) a(2,2) a(1,4) a(2,4)]' ] A2=[[a(2,1) a(3,1) a(2,3) a(3,3)]' [a(2,2) a(3,2) a(2,4) a(3,4)]' ]
2 Comments
Cedric
on 21 May 2014
What doesn't work with the current approach? Do you need to generalize it to larger arrays? If so, what will be the size of these arrays and what will you want to perform ultimately?
Answers (2)
Andrei Bobrov
on 25 May 2014
A1 = reshape(permute(reshape(a(1:end-1,:),2,2,[]),[1,3,2]),[],2);
a02 = [a(:,2:end-1);a(2:end,end)'];
A2 = reshape(permute(reshape(a02',2,2,[]),[1 3 2]),[],2);
0 Comments
George Papazafeiropoulos
on 25 May 2014
a=[ 0 0 0.3013 1.1305;
1.0000 2.0000 0.7390 0.4223;
3.0000 2.0000 1.1305 -0.2111];
A1=[[a(1,1) a(2,1) a(1,3) a(2,3)]' [a(1,2) a(2,2) a(1,4) a(2,4)]' ]
A2=[[a(2,1) a(3,1) a(2,3) a(3,3)]' [a(2,2) a(3,2) a(2,4) a(3,4)]' ]
for i=1:size(a,1)-1
b=a(i:i+1,:);
b=b(:);
n1=1:size(a,2)-1;
b1=b;
ind1=3+cumsum([0,2+(-1).^n1]);
b1(ind1)=[];
b2=b;
ind2=1+cumsum([0,2+(-1).^n1]);
b2(ind2)=[];
A=[b1 b2]
end
0 Comments
See Also
Categories
Find more on Matrices and Arrays in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!