i need your help with vector creation from original vector

please help

i have a vector called x =1:20

find the vector of 𝑑𝑥 = {𝑥_𝑖 + 1 - 𝑥_i}

for 𝑖 = {1, 2,. . . , 𝑁 - 1}

Answer 1

[Ahmet Parker]

Hard way

do a for loop

sizex=size(x);
for i=1:sizex(1,2)-1
dx(i)=x(i+1)-x(i);
end

[Mustafa Ahmed]

that worked very well thanx alot

x=[17 8 12 15 6 11 9 18 16 10 13 19];

i=1:11;

sizex=size(x);

for i=1:sizex(1,2)-1

dx(i)=x(i+1)-x(i);

end

disp(dx)

Answer 2

[Image Analyst]

v=diff(x)

[Image Analyst]

%--------------------------------------
% Method 1 : for loop
x = [17 8 12 15 6 11 9 18 16 10 13 19];
i = 1 : 11;
sizex = size(x);
for i = 1 : sizex(1,2)-1
	dx(i)=x(i+1)-x(i);
end
fprintf('Results for for loop:\n');
disp(dx)
%--------------------------------------
% Method 2 : diff() function
fprintf('Results for diff():\n');
disp(diff(x))
fprintf('Done running %s.m ...\n', mfilename);

Results for for loop:

-9 4 3 -9 5 -2 9 -2 -6 3 6

Results for diff():

-9 4 3 -9 5 -2 9 -2 -6 3 6