Re: mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg65786] Re: [mg65748] mathematica
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Mon, 17 Apr 2006 02:28:44 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

```holdPlus[a_List,b_List]:=Module[{f},
Dimensions[a]==Dimensions[b];

a={{1,4},{34,5}};
b={{12,4},{4,35}};

holdPlus[a,b]

{{1 + 12, 4 + 4}, {34 + 4, 5 + 35}}

%//ReleaseHold

{{13, 8}, {38, 40}}

Bob Hanlon

>
> From: liv elena <llivvia2003 at yahoo.com>
To: mathgroup at smc.vnet.net
> Subject: [mg65786] [mg65748] mathematica
>
>
> [This post has been delayed due to email problems - moderator]
>
>
>    hello,
>
>   ai have the next code :
>   a = {{1, 4}, {34, 5}}
>   b = {{12, 4}, {4, 35}}
>
>   and ai want to obtain a matrix like this:
>   rez={{1+12,4+4},{34+4,5+35}}
>
>   ..
>   if i use
>   c = {{StringForm["a[[1,1]]+b[[1,1]]"], StringForm["a[[1,2]]+b[[1,2]]"]},
>   {StringForm["a[[2,1]]+b[[2,1]]"],
>   StringForm["a[[2,2]]+b[[2,2]]"]}}
>   i obtain :
>   \!\(\*FormBox[
>     RowBox[{"(", "\[NoBreak]", GridBox[{
>           {"\<\"a[[1,1]]+b[[1,1]]\"\>", "\<\"a[[1,2]]+b[[1,2]]\"\>"},
>           {"\<\"a[[2,1]]+b[[2,1]]\"\>", "\<\"a[[2,2]]+b[[2,2]]\"\>"}
>
>   but ai want the numerical values ..
>   thank you verry much
>
>
>
>

```

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