Bitinformation along dimensions of size 2 fails when masked_value given

[observingClouds]

In observingClouds/xbitinfo#286 popped up a test case, where the dimension along which the bitinformation shall be retrieved has a size of 2. I could trace this back to the Julia implementation:

>>> using BitInformation
>>> A = [1. 2. 3. 4. ; 5. 6. 7. 8.]
2×4 Matrix{Float64}:
 1.0  2.0  3.0  4.0
 5.0  6.0  7.0  8.0

>>> BitInformation.bitinformation(A, dim=1, masked_value=nothing)
64-element Vector{Float64}:
 0.0
 0.0
 0.0
 0.0
 0.0

>>> BitInformation.bitinformation(A, dim=2, masked_value=999.)
64-element Vector{Float64}:
 0.0
 0.0
 0.0
 0.0

>>> BitInformation.bitinformation(A, dim=1, masked_value=999.)
ERROR: AssertionError: Mask has 4 unmasked values, 0 entries are adjacent.
Stacktrace:
 [1] bitinformation(A::Matrix{Float64}, mask::BitMatrix; dim::Int64, set_zero_insignificant::Bool, confidence::Float64)
   @ BitInformation ~/.julia/packages/BitInformation/rcCbn/src/mutual_information.jl:105
 [2] bitinformation
   @ ~/.julia/packages/BitInformation/rcCbn/src/mutual_information.jl:90 [inlined]
 [3] bitinformation(A::Matrix{Float64}; dim::Int64, masked_value::Float64, kwargs::@Kwargs{})
   @ BitInformation ~/.julia/packages/BitInformation/rcCbn/src/mutual_information.jl:72
 [4] top-level scope
   @ REPL[66]:1

Shouldn't the last call work?

[milankl]

Yes, this should work, but this is currently implemented as masking the last element in the first dimension to not count bitpairs across boundaries. Hence, right now you're actually counting bitpairs for

julia> mask
2×4 BitMatrix:
 0  0  0  0
 1  1  1  1

where there is no adjacent pairs to count, hence the assertion error. Not the best algorithm I agree, will change this to a loop that doesn't have that problem!

[milankl]

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Registration pull request created: JuliaRegistries/General/112971

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[milankl]

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Registration pull request created: JuliaRegistries/General/113147

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Tagging

After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.

This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via:

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git push origin v0.6.3