EMRFD Message Archive 2627
Message Date From Subject 2627 20090123 22:20:24 Steve Manipulating complex numbers Hope I'm not bringing up a previously discussed topic, but I was unable
to find anything about this in the archive.
I have been using the imaginary functions in Excel to manipulate complex
numbers. I'm wondering if group members use other software that might be
better? Preferably free software. :)
Any advice?
Steve K8JQ2628 20090124 01:29:49 Dave  WB6DHW Re: Manipulating complex numbers I don't know if it handles imaginary functions or not, but Open Office
is an free alternative to Microsoft Office. The spreadsheet reads and
writes Excel formats.
Dasve  WB6DHW
<http://wb6dhw.com>
Steve wrote:
> Hope I'm not bringing up a previously discussed topic, but I was unable
> to find anything about this in the archive.
>
> I have been using the imaginary functions in Excel to manipulate complex
> numbers. I'm wondering if group members use other software that might be
> better? Preferably free software. :)
>
> Any advice?
>
> Steve K8JQ
>
>
>2629 20090124 03:48:54 Niels A. Moseley Re: Manipulating complex numbers Steve wrote:
> Hope I'm not bringing up a previously discussed topic, but I was unableHi Steve,
> to find anything about this in the archive.
>
> I have been using the imaginary functions in Excel to manipulate complex
> numbers. I'm wondering if group members use other software that might be
> better? Preferably free software. :)
>
> Any advice?
>
> Steve K8JQ
>
You could try Octave, which is an free MATLAB clone.
The syntax is simple, for instance:
(1 + 2i)*(3  3i)
gives:
9 + 3i
Magnitude is calculated by the abs(.) function, and the angle is
calculated by angle(.) and gives the angle in radians.
You can download the windows version of Octave at:
http://sourceforge.net/project/showfiles.php?group_id=2888&package_id=40078
It can also plot, design filters (both analog and digital) etc..
73,
Niels PE1OIT2630 20090124 04:08:49 leon Heller Re: Manipulating complex numbers  Original Message 
2631 20090124 04:31:38 Rick Commo Re: Manipulating complex numbers I have OpenOffice installed on one of my computers  more of a curiosity than anything else since I
have MSFT Office on the main computers.
I just checked it and want to report that Calc (the Excel equivalent) does have functions for
imaginary and complex operations.
Cheers,
rick
Original Message
2632 20090124 07:55:46 pamunoz2001 Re: Manipulating complex numbers In AppCAD 3.0.2 there is a "Complex Math Calculator for RF Circuits".
You can download AppCAD2634 20090124 11:27:43 Steve Re: Manipulating complex numbers Thanks all for the pointers.
I'm going to look at AppCAD, Scilab and Octave.
EXCEL (and probably CALC) have their place, but I was looking something
with syntax like Niels' Octave example.
Appreciate the help.
Steve K8JQ
pamunoz2001 wrote:
> In AppCAD 3.0.2 there is a "Complex Math Calculator for RF Circuits".
>
> You can download AppCAD2635 20090124 11:42:56 Pat Bunn Re: Manipulating complex numbers You should have received several flat solder lugs in the kit.
I will send some Monday. Please send me your address.
Pat
STF
 Original Message 2636 20090124 12:24:52 Pat Bunn Re: Manipulating complex numbers Sorry about the misreply.
Pat
N4LTA
 Original Message 
2638 20090125 09:31:57 Nick Kennedy Re: Manipulating complex numbers Ocatve is pretty impressive, but I've found the learning curve pretty
steep. It has all the frustrations associated with a high level
language with rigid rules of syntax. But the way it can calculate and
plot complex expressions with just a few (carefully debugged) lines of
code is amazing.
After seeing so many articles on it in QEX, I decided to give it a go
and downloaded the Windows version. But I need a lot more study to
consider myself proficient on it.
73Nick, WA5BDU
>
> Hi Steve,
>
> You could try Octave, which is an free MATLAB clone.
> The syntax is simple, for instance:
>
> (1 + 2i)*(3  3i)
>
> gives:
> 9 + 3i
>
>2639 20090125 17:04:15 Gary Chatters Re: Manipulating complex numbers For basic calculator operations, there is a "calc" package that comes
with XEmacs.
Complex numbers are represented as number pairs, so the calculation
below would be entered as:
(1,2)
(3,3)
*  Notes, RPN, which some of us prefer.
(9,3)  The result
It also does polar coordinates and has various functions. The basics
are easy, but calc has a lot of capabilities and would take a while to
learn.
This would only be useful if you already have XEmacs or are thinking of
installing an editor. This should work for emacs as well, but my
installation does not have it. Available for both Linux and Windows.
Gary
Niels A. Moseley wrote:
>
>
> Steve wrote:
> > Hope I'm not bringing up a previously discussed topic, but I was unable
> > to find anything about this in the archive.
> >
> > I have been using the imaginary functions in Excel to manipulate complex
> > numbers. I'm wondering if group members use other software that might be
> > better? Preferably free software. :)
> >
> > Any advice?
> >
> > Steve K8JQ
> >
>
> Hi Steve,
>
> You could try Octave, which is an free MATLAB clone.
> The syntax is simple, for instance:
>
> (1 + 2i)*(3  3i)
>
> gives:
> 9 + 3i
>
> Magnitude is calculated by the abs(.) function, and the angle is
> calculated by angle(.) and gives the angle in radians.
>2641 20090126 01:48:16 Johan H. Bodin Re: Manipulating complex numbers Steve,
CalcEd is a nice little text editor with builtin math capapbilities. Just write
formulas as you would do on a piece of paper and CalcEd does the calculations
for you right in the text. It handles complex arithmetic with ease and it can
plot too!
It is a freeware program written by Wolf DL4YHF (famous for his Spectrum Lab
software).
http://freenethomepage.de/dl4yhf/
Just follow the link to CaldEd.
73
Johan SM6LKM
