# How to code difference quotients in matlab?

9 views (last 30 days)
ekagra gupta on 13 Jun 2022
Commented: Image Analyst on 14 Jun 2022
I have a vector U and I want to take its difference quotient at a time instance j i.e. I want to find dU as shown below. How can it be done?
Thank you guys in advance!

Jonas on 13 Jun 2022
elementwise differences of consecutive elements can be calculated using diff() command
##### 2 CommentsShowHide 1 older comment
Image Analyst on 14 Jun 2022
U = randi(9, 1, 10)
U = 1×10
2 2 5 8 2 7 8 9 5 1
% Compute difference
du = diff(U)
du = 1×9
0 3 3 -6 5 1 1 -4 -4
% Compute variance
varU = var(du)
varU = 14.1111
Not sure what you mean by ratio. A ratio is a fraction of something divided by something. What are you ratioing? The ratio of a single number -- the variance -- doesn't make sense.

### Categories

Find more on Get Started with MATLAB in Help Center and File Exchange

### Community Treasure Hunt

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

Start Hunting!

Translated by