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Re: Mathematica Help Urgent (Very New Beginner)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93387] Re: Mathematica Help Urgent (Very New Beginner)
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Wed, 5 Nov 2008 04:57:13 -0500 (EST)

On 11/4/08 at 6:17 AM, derekcashel at yahoo.com (Derek) wrote:

>I am just beginning to learn to use Mathematica, and need to create
>a table of values. I would like to be able to input x-values and
>have the table display f(x), f'(x), and possibly f''(x) for a given
>function. I have already specified the function, and I have found
>the following input creates tables:

>Table[{x,f[x]},{x,-5,5,.5}]

>My problem is this: I would like to input specifc x-values, rather
>than use set intervals as defined in {x,-5,5,.5} above. Is there a
>way to specify a list of specific x values so that Mathematica
>computes the values of f[x] in table form?

Easily done using Map and a pure function. For example,

generate some data

In[41]:= RandomInteger[10, {5}]

Out[41]= {1,9,3,10,5}

and

In[42]:= {#, f[#]} & /@ Sort[%]

Out[42]= {{1, f[1]}, {3, f[3]}, {5, f[5]}, {9, f[9]},
    {10, f[10]}}

gives the desired table


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