Remove explicit null values from sparse matrix in Julia

Question

Remove explicit null values from sparse matrix in Julia

Is it possible to remove explicit null value from sparse matrix in Julia?

Namely, I want to convert a=sparse([1],[1],[0])

tob=spzeros(1,1)

+3

julia-lang

sholi 08 june 17 at 4:06

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1 answer

Matt B. · Accepted Answer · 2017-06-08T04:25:08+0000

Yes: see dropzeros

:

julia> a=sparse([1],[1],[0])
1×1 SparseMatrixCSC{Int64,Int64} with 1 stored entry:
  [1, 1]  =  0

julia> dropzeros(a)
1×1 SparseMatrixCSC{Int64,Int64} with 0 stored entries

Or you can do it in-place (change a

) with dropzeros!

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Remove explicit null values ​​from sparse matrix in Julia

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Remove explicit null values from sparse matrix in Julia