How to code difference quotients in matlab?
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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!
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Jonas
le 13 Juin 2022
elementwise differences of consecutive elements can be calculated using diff() command
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Image Analyst
le 14 Juin 2022
U = randi(9, 1, 10)
% Compute difference
du = diff(U)
% Compute variance
varU = var(du)
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.
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