Symbolics.jl
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TypeError: non-boolean (Num) used in boolean context with symbolic Julia
I asked about this at https://stackoverflow.com/questions/73519459/typeerror-non-boolean-num-used-in-boolean-context-with-symbolic-julia-how-to and was suggested to open an issue. Getting an error on sqrt(-im+x)
where x
is variable using Symbolics
.
Here is the code
>julia
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_ _ _(_)_ | Documentation: https://docs.julialang.org
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_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
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| | |_| | | | (_| | | Version 1.7.3 (2022-05-06)
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julia> using Symbolics
julia> @variables x
1-element Vector{Num}:
x
julia> sqrt(-im+x)
ERROR: TypeError: non-boolean (Num) used in boolean context
Stacktrace:
[1] sqrt(z::Complex{Num})
@ Base ./complex.jl:501
[2] top-level scope
@ REPL[3]:1
variables x
julia>
As was suggested in the link above, using @syms x
instead of @variables x
then the error goes away.
I got curious from the SO question. I've yet to find a single function that works for Complex[Num}
, apart from abs
@variables z::Complex[Num}
abs(z) # :)
exp(z) # :(
sin(z) # :(
sqrt(z) # :(
nor could i manage to register any function, even custom ones, that would work for Conplex[Num}
Any news on this?:) I also just bumped into the same issue.