162     ar=np.zeros(np.array(a.shape) * [1,2])
163     ar[::,0::2]=a.real
164     ar[::,1::2]=a.imag
165     return(ar)
167 def realToIm2D(ar):  argument
168     return(ar[::,0::2] + 1j * ar[::,1::2])
175 ar = imToReal2D(a)  variable
178 v=dsp.arm_mat_cmplx_mult_f32(ar,br)
221     ar=np.zeros(np.array(a.shape) * 2)
222     ar[0::2]=a.real
223     ar[1::2]=a.imag
224     return(ar)
226 def realToIm1D(ar):  argument
227     return(ar[0::2] + 1j * ar[1::2])