Here's an example: <div class="highlight highlight-source-julia notranslate positi

Thanks! I'll make a PR soon. Minor thing, but <div class="hi

`gausslaguerre(n, α)` produces error if α is Int about fastgaussquadrature.jl HOT 2 CLOSED

juliaapproximation commented on September 25, 2024

`gausslaguerre(n, α)` produces error if α is Int

from fastgaussquadrature.jl.

Comments (2)

dlfivefifty commented on September 25, 2024 1

Would be able to make a PR with test for this? We just need to change that line to

SymTridiagonal(promote(alph, beta)...)

(Even better, change alph -> α and beta -> β)

from fastgaussquadrature.jl.

hyrodium commented on September 25, 2024

Thanks!
I'll make a PR soon.

Minor thing, but

SymTridiagonal(promote(collect(α), β)...)

works fine.

minor example for promote.

julia> versioninfo()
Julia Version 1.5.3
Commit 788b2c77c1 (2020-11-09 13:37 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: AMD Ryzen 7 2700X Eight-Core Processor
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, znver1)

julia> promote(1:3:4,rand(5))
ERROR: promotion of types StepRange{Int64,Int64} and Array{Float64,1} failed to change any arguments
Stacktrace:
 [1] error(::String, ::String, ::String) at ./error.jl:42
 [2] sametype_error(::Tuple{StepRange{Int64,Int64},Array{Float64,1}}) at ./promotion.jl:306
 [3] not_sametype(::Tuple{StepRange{Int64,Int64},Array{Float64,1}}, ::Tuple{StepRange{Int64,Int64},Array{Float64,1}}) at ./promotion.jl:300
 [4] promote(::StepRange{Int64,Int64}, ::Array{Float64,1}) at ./promotion.jl:283
 [5] top-level scope at REPL[5]:1

julia> promote(collect(1:3:4),rand(5))
([1.0, 4.0], [0.5083186666783843, 0.9151424727982986, 0.8490125570296196, 0.26787162487431626, 0.14753794371832551])