Why does the heatmap() function in Plots.jl flip data?

General Usage
1 
julia> A = [1 2 3;4 5 6;7 8 9]
3×3 Matrix{Int64}:
 1  2  3
 4  5  6
 7  8  9

julia> heatmap(A)

plot_9

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2

Some plotting packages have this default and some do the other way around with good arguments for both positions. I think there is no a definitive best choice, it just takes getting used to. See related discussion here https://github.com/JuliaPlots/Plots.jl/issues/273 and links therein.

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