If I have a vector:

x = [1,2,6,3]

And I want to calculate the ratio of the numbers, what's an easy way to do this?

E.g. I want:

[2.0,3.0,0.5]

CodePudding user response：

You can either write a loop,

[x[i 1] / x[i] for i = 1:length(x)-1]

or use a vectorized division:

@views x[2:end] ./ x[1:end-1]
3-element Vector{Float64}:
 2.0
 3.0
 0.5

In terms of performance, both would be identical. The vectorized form, however, might be the preferred approach for more generic (think GPU) and arguably more readable code.