Re: Adding Vectors -- Newbie help please
- To: mathgroup at smc.vnet.net
- Subject: [mg51992] Re: Adding Vectors -- Newbie help please
- From: David Bailey <dave at Remove_Thisdbailey.co.uk>
- Date: Sat, 6 Nov 2004 02:08:34 -0500 (EST)
- References: <cmfc9b$7k3$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
motz art wrote:
> Mathematica v5: How can I input vectors in polar form and
> rectangular form?
>
> Example:
>
> a:= (r1, theta1) + (r2, theta2) Polar form.
>
> b:= (re1 , j* im1) + (re2, j*im2) Rectangular form
>
> I know this should be pretty basic, but I haven't found examples
> of this kind of input.
>
> I would guess it would be something like:
>
> Polar[magnitude, phase]
> Rectangular[Real, Imaginary]
>
> but, apparently not. (This is for electronics engineering.)
>
> Thanks for any help.
>
>
>
>
>
You can easily write a function to convert from polar to coordinate form:
FromPolar[r_, theta_] := {r Cos[theta], r Sin[theta]}
Note that this assumes your angles are measured in radians. Once all
your vectors are in coordinate form you can add/subtract then directly:
{1,2}+(3,4}
produces
{4,6}
Regards,
David Bailey