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Forum index » Science and Technology » Math » Symbolic
can't plot ln(x)
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Julian V. Noble
science forum Guru Wannabe


Joined: 03 May 2005
Posts: 148

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

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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G. A. Edgar
science forum Guru


Joined: 29 Apr 2005
Posts: 470

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

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.ohio-state.edu/~edgar/
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funfpga@yahoo.ca
science forum beginner


Joined: 08 Jun 2006
Posts: 4

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