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Re: Statistics`NormalDistribution` doesn't work?


On 9/17/04 at 1:17 AM, fake at mail.com (pshoplifter) wrote:

>I'm not a Mathematica newbie but I thought I was going mad until I
>noticed that even this copy from the helpbrowser doesn't get any
>results:

>In[123]:=    << Graphics`Graphics`
>In[124]:=    << Statistics`NormalDistribution`
>In[125]:=    ndist = NormalDistribution[0, 1]
>Out[125]=    NormalDistribution[0, 1]
>In[126]:=    pdf = PDF[ndist, x]
>Out[126]=    PDF[NormalDistribution[0, 1], x]
>In[127]:=    Plot[pdf, {x, -3, 3}]

>Plot::plnr: pdf is not a machine-size real number at x =
>-2.99999975`. etc.

>Any help for this seemingly simple problem would be appreciated!

Try pasting the following into a fresh session

<< "Statistics`NormalDistribu\tion`"
ndist = NormalDistribution[0, 1]
pdf = PDF[ndist, x]
Plot[pdf, {x, -3, 3}]

My guess is that someplace in the notebook before you tried this example, you gave x a specific value causing the Plot function to fail. 
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