How to make the condition for checking the matrix value ?

function [popnew1,mutated] =mutation(A,Pm)
mutated = find(rand(size(A))<Pm);   
popnew1 = A;
% Why my this condition is not working
if A(mutated)== 1
   popnew1(mutated) = 2-A(mutated);
else
   popnew1(mutated) = 1-A(mutated);
end
%
end

Please Help me why my this condition part is not working Where A is 3x8 matrix and Pm=0.1 .

Where is the problem in my condition ?

Answer 1

[VBBV]

popnew1 = 2-A(mutated);

[VBBV]

You need to assign popnew1 as above, after substituting the indices in A matrix to get new popnew1.

[Akash Pal]

Can you tell me which steps i need to change in my coding ? Because i did not understand your advise .

If you can show me in my coding .

Thanks in advance .

[Akash Pal]

Or can you set any condition where if the mutated point value is zero then only it will change to 1 ,Otherwise if the mutated point is 1 then it will not be changed ,means it will be same as 1

[Akash Pal]

[VBBV]

Why do you want substitute the mutated indices in popnew1 instead of assigning it ?. Look at the change suggested for the line in beginning. mutated is indices vector where the values of A are less than Pm.

[VBBV]

if A(mutated)== 1
 popnew1 = 2-A(mutated);
else
 popnew1 = 1-A(mutated);
end

[Akash Pal]

Sorry to say this logic is not working ,its only showing the mutated point

[VBBV]

May be the below change you need to do

A = eye(3,8)  %  The A matrix 

A = 3×8

1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0

Pm = 0.1;
[popnew1,mutated] = mutation(A,Pm)

popnew1 = 3×8

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

mutated = 21×1

2 3 4 6 7 8 10 11 12 13

function [popnew1,mutated] = mutation(A,Pm)
mutated = find(A<Pm);   
popnew1 = A;
% Why my this condition is not working
if A(mutated) == 1
   popnew1(mutated) = 2-popnew1(mutated);  % in place of A put popnew1
else
   popnew1(mutated) = 1-popnew1(mutated);  % in place of A put popnew1
end
%
end

[VBBV]

if A(mutated) == 1
   popnew1(mutated) = 2-popnew1(mutated);  % in place of A put popnew1
else
   popnew1(mutated) = 1-popnew1(mutated);  % in place of A put popnew1
end

[Akash Pal]

Thank you for your suggestion .