for loop iteration dimension

w=[1 2 3 4 5 6 7];

I want to subtract each element from the neighboring one. like to have finally; w2=[1-2,2-3,3-4,4-5,5-6,6-7]; in a for loop i can write i=1 for i=1:7; W2(i)=w(i)-w(i+1)

i=i+1; end but i get error that the last number can be read since it is out of dimension. how should i do then?

so many thanks

Answer 1

[Shashvat Prakash]

Pay attention to the size of w2. It is a six-element array, not a seven element one. So your code should be:

for i=1:6
  w2(i)=w(i)-w(i+1);
end

Alternatively, you can write:

w2=w(1:end-1)-w(2:end)

This avoids the time-consuming loop.