Because they are still complex numbers
(which triggers a different plot type
for which all zero Y coords may fail.)
datatype 12 o."1 0 j./2 3 4 [EMAIL PROTECTED] 0
complex
(Which is a question in and of itself:
why 12 o. is a complex type?)
So can either the real part
plot [EMAIL PROTECTED] o."1 0 j./2 3 4 [EMAIL PROTECTED] 0
or get angle with a different promitive
with real result:
plot {:@*. j./2 3 4 [EMAIL PROTECTED] 0
datatype {:@*. j./2 3 4 [EMAIL PROTECTED] 0
floating
--- Graham Parkhouse <[EMAIL PROTECTED]> wrote:
> I'm doing some engineering in J, but I'm a novice. Please could someone help
> me.
>
> I need to be able to plot phase angles etc from complex results and find
>
> load 'plot'
> a=:j./?2 3 3$7 NB. Random complex array
> a
> 1 5 3j3
> 5j3 2j6 1j2
> 0j6 5j4 6j1
> 12 o."1 0 a NB. Their phase angles
> 0 0 0.785398
> 0.54042 1.24905 1.10715
> 1.5708 0.674741 0.165149
> plot 12 o."1 0 a NB. Plot them
> |domain error: glcmds
> | glcmds buf
>
> NB. Problem!
>
> b=:12 o."1 0 a
> plot b
> |domain error: glcmds
> | glcmds buf
>
> NB. Still got a problem!
>
> plot |b
>
> NB. This works! Why?
>
> Enlightenment will be much appreciated. Thanking you in anticipation.
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
