[julia-users] irfft function

[Weichi Ding]

Hi,

It seems irfft function doesn't take an array of "Array{Any,1}" as input 
even each element of the array is a complex number. 

To run  irfft(S, 20)       ## typeof(S) --> Array{Any,1}

I got an error message below 

ERROR: no method brfft(Array{Any,1},Int64,Range1{Int64})
 in irfft at fftw.jl:667

How to change the type of S to {Complex{Float64},1}?
 I tried S=complex(S), it gives an error "ERROR: InexactError()
 in setindex! at array.jl:412

Thanks