MATLAB: How to reverse a subarray of an array

arrayexchangeMATLABmatrixpermutationreversesubarraysubsequenceswapvector

Reversing element order in a selected sub sequence?

Two positions are selected randomly then element positions between these two positions are reversed.

For example: A = [1 2 3 4 5 6 7 8 9 10]; idx = randi(10, 1, 2) = [3 8]; 'A' will be become A = [1 2 8 7 6 5 4 3 9 10]

Thank you

Best Answer

A([1:min(idx)-1,max(idx):-1:min(idx),max(idx)+1:10])

Related Solutions

MATLAB: How to select two number randomly from an array and perform swapping between these two number

    A=[1 2 3 5 6 9 10] ;
    %%select two numbers and swap
%%using randsample
    idx = randsample(1:length(A),2) ;
    B = A ;
    B(fliplr(idx)) = A(idx) ;
    %%using randperm
  idx = randperm(length(A),2) ;
  B = A ;
  B(fliplr(idx)) = A(idx) ;

MATLAB: Search subarray closest other array

One way:

A = [4, 5.5, 7, 8.1, 1, 5, 6, 7, 8, 9];
B = [5.5, 6.2, 7, 7.9];
for i=1:length(A)-4
    result(i)=sum(A(i:i+3)-B);
end
idx=find(result==min(result));
result_array=A(idx:idx+3)

You can use simmilar logic to implement it without loop too.

Best Answer

Related Solutions

MATLAB: How to select two number randomly from an array and perform swapping between these two number

MATLAB: Search subarray closest other array

Related Question