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funfpga@yahoo.ca science forum beginner
Joined: 08 Jun 2006
Posts: 4

Posted: Fri Jun 09, 2006 5:28 pm Post subject:
can't plot ln(x)



help, can't plot ln(x)
plot(ln(x));
Warning, unable to evaluate the function to numeric values in the
region; see the plotting command's help page to ensure the calling
sequence is correct
any workaround? thanks 

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G. A. Edgar science forum Guru
Joined: 29 Apr 2005
Posts: 470

Posted: Fri Jun 09, 2006 6:02 pm Post subject:
Re: can't plot ln(x)



In article <1149874099.477731.134140@u72g2000cwu.googlegroups.com>,
<funfpga@yahoo.ca> wrote:
Quote:  help, can't plot ln(x)
plot(ln(x));
Warning, unable to evaluate the function to numeric values in the
region; see the plotting command's help page to ensure the calling
sequence is correct
any workaround? thanks

You didn't say you are using Maple, I assume you are...
?plot
will provide the help page for the plot command, in particular
it will show you the syntax for it...
How about this:
plot(ln(x),x=0..5,y=5..5);

G. A. Edgar http://www.math.ohiostate.edu/~edgar/ 

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Julian V. Noble science forum Guru Wannabe
Joined: 03 May 2005
Posts: 148

Posted: Sun Jun 11, 2006 12:58 am Post subject:
Re: can't plot ln(x)



funfpga@yahoo.ca wrote:
Quote:  help, can't plot ln(x)
plot(ln(x));
Warning, unable to evaluate the function to numeric values in the
region; see the plotting command's help page to ensure the calling
sequence is correct
any workaround? thanks

Have you included x=0 in the plotting range? Start at a larger
x.

Julian V. Noble
Professor Emeritus of Physics
University of Virginia 

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