Re: Very very basic question about Mathematica expressions

• To: mathgroup at smc.vnet.net
• Subject: [mg111139] Re: Very very basic question about Mathematica expressions
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Wed, 21 Jul 2010 07:15:22 -0400 (EDT)

```For a start at what's going on, try:

s = x + h;
Manipulate[s^2, {h, 0.1, 1}]

On 7/20/2010 3:42 AM, Sam Takoy wrote:
> Hi,
>
> I find that I don't understand a very basic thing about the building
> blocks of Mathematica.
>
> When the first command is
>
> s = x + h
>
> I figured that (string?) "s" represents (string?) "x+h".
>
> This theory pans out when one tries
>
> s^2
>
> or
>
> D[s, x]
>
> or
>
> Integrate[s, {x, 0, h}]
>
> and
>
> s /. h ->  1
>
> But then by doesn't this work:
>
> Manipulate[ Plot[s, {x, 0, h}], {h, 0.1, 1}]
>
>

--
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305

```

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