Hi all, I have a large sparse matrix A ( its size is (2823,2823 ) its type is SparceMatrixCSC{ Integer, Int64} ) with 0/1 values only. I want to get a sparse matrix B = A^2, and get the largest value in this matrix. For reasons beyond my understanding it looks like matrix B suddenly gets a typ…

[image] Annette_F: A = zeros( Integer, 2400, 2400 ) Do you have a reason for using Integer (an abstract type) here? If you use a concrete type like Int (or BigInt if you need the ability to store arbitrarily large numbers), it will not widen the element type to Any when multiplying.

Sparse matrix product causes unnecessary casting to "Any" thereby causing issues?

General Usage

cjdoris July 15, 2021, 8:05am 11

Why is the element type being widened at all? Why doesn’t it stay Integer?

2 Likes

Why is the product of Real and Float64 arrays of eltype Any?

Topic		Replies	Views
UniformScaling with SparseMatrixCSC{T,Int32} loses integer type Internals & Design linearalgebra	7	824	January 10, 2019
Dense .+ sparse -> sparse? Internals & Design	2	601	January 26, 2019
Bug in sparse matrix .+= scalar? Internals & Design	7	804	August 1, 2017
Index type of sparse matrix General Usage type , linearalgebra , sparse	7	980	February 8, 2021
Unification of `SparseMatrixCSC` and `SparseVector` Internals & Design	4	475	January 26, 2019

Sparse matrix product causes unnecessary casting to "Any" thereby causing issues?

Related topics