How do I compose two vectorized functions?

New to Julia
1

How do I compose two vectorized functions?

julia> A = [1.0, 2.0, 3.0]
3-element Array{Float64,1}:
 1.0
 2.0
 3.0

julia> sin.(cos.(A))
3-element Array{Float64,1}:
  0.5143952585235492
 -0.4042391538522658
 -0.8360218615377305

julia> (sin. ∘ cos.)(A)
ERROR: syntax: missing comma or ) in argument list
Stacktrace:
 [1] top-level scope at REPL[8]:0
2 
julia> (sin ∘ cos).(A)
3-element Array{Float64,1}:
  0.5143952585235492
 -0.4042391538522658
 -0.8360218615377305
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3

Thank you.

So i should compose the two functions first then vectorized the resultant function on the data

4

sin.(cos.(A)) already “fuses” the functions into a single pass over the data, essentially equivalent to (sin ∘ cos).(A): More Dots: Syntactic Loop Fusion in Julia

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