"expression evaluates to non-numeric value somewhere in plotting range".
Yes, that message means it tried to evaluate the function at x=0 which is
not a numeric value since you get 0/0 there which is undefined.
Rich
On Fri, Jan 1, 2010 at 2:19 PM, mok-kong shen <mok-kong.shen at t-online.de>wrote:
> Hello,
>
> This is a newbee's problem: I just tried wxMaxima 0.8.4 and entered as
> in the manual (chap. 1, Introduction to Maxima) the following command:
>
> plot2d(sin(x)/x,[x,-20,20])
>
> I obtained the plot but on ending the plot window there appeared a
> message in the main window:
>
> plot2d: expression evaluates to non-numeric value somewhere in
> plotting range.
>
> What had I done wrongly? Thanks for your help in advance.
>
> M. K. Shen
>
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