real & imaginary part

Hi

My output is like (0.000 + 1.000i).

How I can show output without real part and like (1i)?

It is important that the output contain i.

Thanks a lot

Answer 1

[John D'Errico]

There is not a display or command window preference that will allow you to do as you have indicated.

X = rand + i*rand
X =
          0.981596208916383 +     0.496799421779149i

real(X)
ans =
         0.981596208916383

imag(X)*i
ans =
                          0 +     0.496799421779149i

But now, you want to see this without the 0 real part. The thing is, if you create the number as imaginary, MATLAB sees it as complex. So it displays a zero real part.

I suppose nothing stops you from using sprintf though. So something like this?

sprintf('%.15fi',imag(X))
ans =
    '0.496799421779149i'

Or this

disp(sprintf('%.15fi',imag(X)))
0.496799421779149i

Or

disp([num2str(imag(X),15),'i'])
0.496799421779149i

To do something more sophisticated than that, you would need to overload disp & display to intercept the result when your input has an imaginary part but no real part.