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htoc(hx), hx a REAL matrix representing complex data with Hermitian

Keywords: time series, complex arithmetic
htoc(hx) returns the fully complex equivalent of the matrix hx,
considering its columns as complex series with Hermitian symmetry.  If
hx is m by n, htoc(hx) is m by 2*n, the real and imaginary parts of
column i of hx in columns 2*i-1 and 2*i of the result.

See topic 'complex' for discussion of complex matrices in MacAnova.

See also ctoh(), cconj(), hconj(), hreal(), himag(), creal(), cimag().

Gary Oehlert 2003-01-15