Re: question about entering vectors by the keyboard
- To: mathgroup at smc.vnet.net
- Subject: [mg16963] Re: question about entering vectors by the keyboard
- From: "David P. Johnson" <johnson at ae.msstate.edu>
- Date: Thu, 8 Apr 1999 02:32:53 -0400
- Organization: Mississippi State University
- References: <7e1cld$bc8@smc.vnet.net> <7ef0e1$c4f$5@dragonfly.wolfram.com>
- Sender: owner-wri-mathgroup at wolfram.com
Well, perhaps not obtuse. You simply misunderstand my question. I want
to be able to hit a button or something that gives me a blank vector
already in matrix form. Like this:
(_)
(_)
(_)
I then want to be able to fill it with whatever:
(a)
(b)
(c)
and evaluate it.
I want the result to be {a,b,c}. Instead what you get is {{a},{b},{c}}.
I realize that I could use Flatten[] to do this, but wondered if I
could avoid this.
The weird thing is (and this is in the notebook in my original post)
that if I evaluate {a,b,c}//MatrixForm, I get the familiar
(a)
(b)
(c)
which you would expect. But when I Copy the output, and Paste it as
input.
(a)
(b)
(c)
and evaluate THIS, I do get {a,b,c}, not {{a},{b},{c}}. This is what I
want. So, can't I make a button that will do this? What would the code
look like. I'm not too familiar with creating buttons.
In article <7ef0e1$c4f$5 at dragonfly.wolfram.com>, Atul Sharma
<mdsa at musica.mcgill.ca> wrote:
> Perhaps I'm being obtuse, but the answer seems straightforward:
>
> {2,3,4}
>
> or
>
> {2,3,4}/ / MatrixForm
>
>
> A. Sharma
>
>
--
David
->(Signature continues here)