Julia: diff(Vector,dims=1)

[PaulSoderlind]

in 0.7.0-beta.108,
diff(ones(6),dims=1) gives

ERROR: MethodError: no method matching diff(::Array{Float64,1}; dims=1)

In contrast, sum(ones(6),dims=1) works.

[martinholters]

Yes, I don't see why we shouldn't have a general diff(A::AbstractArray; dims) method which would also cover the Vector case.

[deepaknalore]

@PaulSoderlind Hey A newbie here. Can you please point me at the right direction?

[PaulSoderlind]

I am certainly no expert either, but I believe the method is defined in

Julia-1.0.0\share\julia\base\multidimensional.jl

It looks like it would be straightforward to add a method.

/Paul S

On Fri, 17 Aug 2018 at 08:53, des2 [e-mail] wrote:

@PaulSoderlind https://github.com/PaulSoderlind Hey A newbie here. Can
you please point me at the right direction?

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[shaktee]

What should its be behavior be?

Is it expected to be the same as

julia> reduce((x,y) -> x-y, ones(6))
-4.0

[PaulSoderlind]

What should its be behavior be?

The same as cumsum seems to be a good starting point. /Paul S

On Sat, 25 Aug 2018 at 14:15, Rajesh Vaidheeswarran <
[email protected]> wrote:

What should its be behavior be?

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