Merge pull request #60 from jverzani/pull-request/3ed4f9e9

Pull request/3ed4f9e9

Author: jverzani

src/Polynomials.jl

@@ -189,6 +189,14 @@ end
 """
 norm(q::Poly, args...) = norm(coeffs(q), args...)
 
+
+"""
+
+* `conj(p::Poly`): return conjugate of polynomial `p`. (Polynomial with conjugate of each coefficient.)
+
+"""
+Base.conj{T<:Complex}(p::Poly{T}) = Poly(conj(coeffs(p)))
+
 """
 
 * `getindex(p::Poly, i)`: If `p=a_n x^n + a_{n-1}x^{n-1} + ... + a_1 x^1 + a_0`, then `p[i]` returns `a_i`.

src/show.jl

@@ -62,7 +62,7 @@ function printterm{T<:Complex}(io::IO,p::Poly{T},j,first)
         end
     else
         if abs_impj > 2*eps(T)
-            print(io,'(', imag(pj),"im)")
+            print(io,'(', abs(imag(pj)),"im)")
         end
     end
     printexponent(io,p.var,j)

test/runtests.jl

@@ -183,3 +183,10 @@ p1 = Poly([4,5,6])
 @test all(p1[0:end] .== [4,5,6])
 p1[0:1] = [7,8]
 @test all(p1[0:end] .== [7,8,6])
+
+
+## conjugate of poly (issue #59)
+as = [im, 1, 2]
+bs = [1, 1, 2]
+@test conj(Poly(as)) == Poly(conj(as))
+@test conj(Poly(bs)) == Poly(conj(bs))