Re: Adding equations
- To: mathgroup at smc.vnet.net
- Subject: [mg14415] Re: Adding equations
- From: phbrf at t-online.de (Peter Breitfeld)
- Date: Sun, 18 Oct 1998 15:10:17 -0400
- Organization: das ist ein weites Feld ...
- References: <703u1n$hup@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Lawrence Walker <lwalker701 at earthlink.net> schrieb/wrote:
> Group:
>
> I've been trying to add two equations as follows:
>
> In[4]:=
> a==b;
> In[5]:=
> c==d;
> In[6]:=
> %4+%5
> Out[6]=
> (a==b)+(c==d)
>
> The result I was looking for is (a+c)==(b+d). The following works but it
> seems clumsy. In[7]:=
> %4[[1]]+%5[[1]]==%4[[2]]+%5[[2]] Out[7]=
> a+c==b+d
> Is there a way to elegantly add (sub, mult, div) two equations? Also is
> there an elegant way to add (sub, mult, div) an expression to both
> sides of an equation?
>
> Lawrence Walker
>
>
Try this:
In1: eq1= a==b; eq2= c==d;
In2: Thread[eq1+eq2,Equal]
Out2: a+c==b+d
es gruesst
Peter
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P e t e r B r e i t f e l d eMail: phbrf at t-online.de
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