i want to transform this into a function

this is the algorith

Q1=q(2);

Q2=q(3)-q(2);

Q3=q(4)-q(3);

Q4=q(5)-q(4);

Q5=q(6)-q(5);

Q6=q(7)-q(6);

Q(n)=q(n+1)-q(n);

how can i plot this into matlab

[Mahmoud Chawki]

i want to have a Q vector that contains these results.

Answer 1

[DGM]

I don't really see why you need a function if you can just do

Q = [q(2) diff(q(2:end))];

But if you really want one:

You could make an anonymous function

q = randi(9,1,10)
myfunction = @(q) [q(2) diff(q(2:end))];
Q = myfunction(q)

or you could make a regular function

q = randi(9,1,10)
Q = myfunction(q)

function out = myfunction(in)
    out = [in(2) diff(in(2:end))];
end

Both of these assume that q is a row vector. If your vector orientation varies, you'll have to deal with that accordingly.