Swap the first and last columns
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function B = swap_ends(A)
B = A(:,[end , 2:end-1 , 1]);
end
tried this , but showing error , can any one help ?
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Risposte (4)
Alessandro Galo
il 26 Mar 2019
This works ;)
if size(A,2) ~= 1 & size(A,2) ~= 0
B = A(:,[end , 2:end-1 , 1])
else
B = A;
end
0 Commenti
madhan ravi
il 16 Dic 2018
Modificato: madhan ravi
il 16 Dic 2018
A=rand(4) % example matrix
B = swap_ends(A) % function call
function B = swap_ends(A) % function definition
A(:,[1 end])=A(:,[end 1]);
B=A;
end
Gives:
A =
0.5200 0.8475 0.4965 0.0832
0.7875 0.0289 0.0663 0.1867
0.2765 0.5650 0.1179 0.9095
0.0962 0.7098 0.3063 0.6303
B =
0.0832 0.8475 0.4965 0.5200
0.1867 0.0289 0.0663 0.7875
0.9095 0.5650 0.1179 0.2765
0.6303 0.7098 0.3063 0.0962
A=rand(1,5) % example row vector/column vector
B = swap_ends(A) % function call
function B = swap_ends(A) % function definition
A([1 end])=A([end 1]);
B=A;
end
Gives:
A =
0.6604 0.9767 0.4717 0.8576 0.9269
B =
0.9269 0.9767 0.4717 0.8576 0.6604
1 Commento
Walter Roberson
il 26 Mar 2019
Modificato: Walter Roberson
il 26 Mar 2019
Alessandro Galo's solution does raise the good point that swapping using end subscript will fail if the array is empty on that dimension, so the swap should be protected with isempty()
Sunil Kumar Giri
il 13 Gen 2020
function B = swap_ends(A)
B = A;
A(:,1) = A(:,end);
A(:,end) = B(:,1);
B = A
end
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ARVIND KUMAR SINGH
il 25 Mag 2020
function B = swap_ends(A)
[~,col] = size(A);
if col<2
B = A;
else
a = A(:,1);
b = A(:,col);
c = A(:,2:col-1);
B =[b c a];
end
end
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