Re: polar(i)

[Doug Stewart]

On Wed, Dec 2, 2015 at 9:51 AM, Muhali <address@hidden> wrote:

I meant it the other way round, of course. polar(i) should be at (0,1) and
not at (1,0).

I think that the idea is:

We can write a complex number in Cartesian or polar form. 

Cartesian is easy a=x+yi

but how to write it in polar form in Octave?

We normally  write it as Mag  at an angle.   

using < to mean an angle    2<.7     mag of 2 at an angle of .7 rad

How to input that in Octave?

one way is to use the real part of a complex number to hold the magnitude

and the imaginary part to hold the angle.

This is what an engineer would expect BUT

Octave and probably matlab do it backwards.

try

a=pi/2+1j

polar(a,'x')

so to use polar notation of complex numbers use

a=angle+mag*j

Don't confuse this with pol2cart   and cart2pol  they are quite different.

I hope this helps :-)

--

DAS