Re: imaginary unit

[Marek Szczypinski]

To avoid overwriting original value of i,j,etc. I am using ii or jj as a 
loop index. Works fine for me:)
Marek

Homo sum, humani nihil a me alienum puto.

On Wed, 26 Apr 2006, Przemek Klosowski wrote:

> e^(i*pi) is the natural way of calculating vectors in complex
> plane. It failed for me, though, and I realized that I used the
> variable 'i' as a loop index, overwriting its original value of an
> imaginary unit vector, which octave assigns on startup to i,I, j,J.
>
> octave:1> i,j,I,J
> i = 0 + 1i
> j = 0 + 1i
> I = 0 + 1i
> J = 0 + 1i
>
> All of those variables can be overwritten:
>
> octave:2> i=j=I=J=1;i,j,I,J
> i = 1
> j = 1
> I = 1
> J = 1
>
> so the safe way to use them is to use 1i etc.
>
> octave:3> 1i,1j,1I,1J
> ans = 0 + 1i
> ans = 0 + 1i
> ans = 0 + 1i
> ans = 0 + 1i
>
> Perhaps the use of predefined 'i' should elicit a warning?
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