public void setComplex(int x, int y, double real, double imag){
		int idx=y*width+x;
		setComplex_atIndex(idx, real, imag);
	}
public void setComplex ( int x , int y , double real , double imag ) { int idx = y * width + x ; setComplex_atIndex ( idx , real , imag ) ; }
Sets the real and imaginary part at the specified position
<br>
If {@link #isSynchronizePowerSpectrum()} is true, then this will also
update the corresponding power value.
@param x coordinate
@param y coordinate
@param real part to be set
@param imag imaginary part to be set