array manipulation in loop through a sequence
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Dear programmers
I have defined an array of 4 values with 1 in all the rows initially as : tissue = [1 1 1 1]
After 1st iteration, I want to replace '1' at 4th position by '2' as: [1 1 1 2].
After 2nd iteration, '2' wil be shifted to 3rd position and new value '3' will take the 4th position as: [1 1 2 3 ] .
After 3rd iteration, '2' wil be shifted to 2nd position ,'3' wil be shifted to 3rd position and new value '4' will take the 4th position as: [1 2 3 4].
After 4th iteration, '2' wil be shifted to 1st position ,'3' wil be shifted to 2nd position, '4' wil be shifted to 3rd position and new value '5' will take the 4th position as: [2 3 4 5].
In the below code even if I am being asked the iteration number but I am getting the results only for the i=4. Where am I doing the error ? Please help!
E = zeros(1,4);
for i=1:4
E(i) = 1
end
prompt = 'What is the iteration number? ';
i = input(prompt)
for i=1:4
E(5-i)= 2
for i=2:4
E(6-i)= 3
for i=3:4
E(7-i)= 4
for i=4
E(4)=5
end
end
end
end
1 Comment
Walter Roberson
on 2 Sep 2019
i = input(prompt)
assigns a particular value to i according to the user's input
for i=1:4
then overwrites i with the value 1, then 2, then 3, then 4.
Accepted Answer
Andrei Bobrov
on 2 Sep 2019
E = ones(4);
n = size(E,1);
for ii = 1:n
E(ii,n-ii+1:n) = E(ii - 1 + (ii == 1),n-ii+1:n) + 1
end
3 Comments
Andrei Bobrov
on 5 Sep 2019
E = ones(1,4);
A = zeros(4);
for ii = 1:4
E(end - ii + 1 : end) = E(end - ii + 1 : end) + 1
A(ii,:) = E;
end
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