how can i subtract the elements in a coloumn ?

1 view (last 30 days)
hello
for example, I have : a=[380 0;381 1;382 2;383 3;383 4;383 5;384 6]
I want to go into first column and do this : (381-380), (382-381), (383-382),
how can i do this in a loop or other ways? Thanks for i=1:length(a) b=a(i,1) ????? end

Accepted Answer

John D'Errico
John D'Errico on 13 Oct 2017
Start reading the tutorials.
diff(a(:,1))

More Answers (1)

Jan
Jan on 13 Oct 2017
Edited: Jan on 13 Oct 2017
Do you mean:
diff(a(:,1))
Alternatively with a loop:
n = size(a, 1) - 1;
b = zeros(1, n);
for k = 1:n
b(k) = a(k+1, 1) - a(k, 1);
end
Or without a loop:
b = a(2:end) - a(1:end - 1);

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!