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REAL

 

Real(X) returns the real part of a complex variable X. Representing X as X_r + i*X_i, this function returns X_r.  

 

Example:  Y=Real(X)

 

The above example will set the real part of Y (Y_r) to the real part of X and the imaginary part of Y to zero.  

 

Note that the Real function is used to extract the real part of a complex number variable or expression.  It cannot be used for assigning the real part of a complex number.  For example,  the equation Real(X)=4 will produce an error.  Instead you should just enter X=4 which will set X to 4 + i*0.  If you wish to only set the real part of variable X, you can enter

 

X_r=4

 

See also: Imag, Magnitude, Angle, CIS, Complex Numbers, Mathematical Functions