transforms: using complex ctor instead of factory

Signed-off-by: Christoph Ruegg <git@cdrnet.ch>

src/Managed/IntegralTransforms/Algorithms/DiscreteFourierTransform.Bluestein.cs

@@ -50,7 +50,7 @@ namespace MathNet.Numerics.IntegralTransforms.Algorithms
             for (int k = 0; k < sequence.Length; k++)
             {
                 double t = s * (k * k);
-                sequence[k] = Complex.WithRealImaginary(Math.Cos(t), Math.Sin(t));
+                sequence[k] = new Complex(Math.Cos(t), Math.Sin(t));
             }
 
             return sequence;
@@ -119,7 +119,7 @@ namespace MathNet.Numerics.IntegralTransforms.Algorithms
         {
             for (int i = 0; i < samples.Length; i++)
             {
-                samples[i] = Complex.WithRealImaginary(samples[i].Imaginary, samples[i].Real);
+                samples[i] = new Complex(samples[i].Imaginary, samples[i].Real);
             }
         }
 

src/Managed/IntegralTransforms/Algorithms/DiscreteFourierTransform.Naive.cs

@@ -57,7 +57,7 @@ namespace MathNet.Numerics.IntegralTransforms.Algorithms
                     for (int n = 0; n < samples.Length; n++)
                     {
                         double w = n * wk;
-                        sum += samples[n] * Complex.WithRealImaginary(Math.Cos(w), Math.Sin(w));
+                        sum += samples[n] * new Complex(Math.Cos(w), Math.Sin(w));
                     }
 
                     spectrum[k] = sum;

src/Managed/IntegralTransforms/Algorithms/DiscreteFourierTransform.RadixN.cs

@@ -76,7 +76,7 @@ namespace MathNet.Numerics.IntegralTransforms.Algorithms
         {
             // Twiddle Factor
             double exponent = (exponentSign * k) * Constants.Pi / levelSize;
-            Complex w = Complex.WithRealImaginary(Math.Cos(exponent), Math.Sin(exponent));
+            Complex w = new Complex(Math.Cos(exponent), Math.Sin(exponent));
 
             int step = levelSize << 1;
             for (int i = k; i < samples.Length; i += step)