Re: [OctDev] No isimag() curioso

[Daniel J S. <dan...@ie...>]

On 09/08/2012 08:52 PM, Michael D Godfrey wrote:

[snip]

> And, this may just add to the noise, but a few days ago I created a
> vector which was composed
> of complex elements, and some "real" elements, i.e. isreal(x(4)) said 1
> and whos x(4) said
> it was only 8 bytes.

That is similar to the example:

octave:20> z = complex([1 2 3],[1 0 2])
z =

    1 + 1i   2 + 0i   3 + 2i

octave:21> isreal(z)
ans = 0
octave:22> isreal(z(1))
ans = 0
octave:23> isreal(z(2))
ans =  1
octave:24> whos z z(1) z(2)
Variables in the current scope:

    Attr Name        Size                     Bytes  Class
    ==== ====        ====                     =====  =====
    c    z           1x3                         48  double
    c    z(1)        1x1                         16  double
         z(2)        1x1                          8  double

Total is 5 elements using 72 bytes

...

Interchanging the square and curved parentheses is another, simpler 
illustration:

octave:28> iscomplex(complex(1,0))
ans =  1
octave:29> iscomplex([complex(1,0)])
ans = 0

Dan