There seemed to be something odd about the cut-and-paste on that last
message. Here it is again.
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/notebook/sage_notebook/worksheets/admin/8/code/227.py",
line 6, in <module>
print _support_.syseval(maple, ur'''val, err = numerical_integral
(sqrt(cos(x)^2 + 1), 0, 2*pi)''', '/home/notebook/sage_notebook/
worksheets/admin/8/cells/93')
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/server/
support.py", line 370, in syseval
return system.eval(cmd, sage_globals, locals = sage_globals)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py", line 980, in eval
return '\n'.join([self._eval_line(L, **kwds) for L in code.split
('\n') if L != ''])
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/maple.py", line 547, in _eval_line
wait_for_prompt=wait_for_prompt).replace('\\\n','').strip()
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py", line 631, in _eval_line
return self._eval_line_using_file(line)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py", line 618, in _eval_line_using_file
s = self._eval_line(self._read_in_file_command(tmp_to_use),
allow_use_file=False)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/maple.py", line 547, in _eval_line
wait_for_prompt=wait_for_prompt).replace('\\\n','').strip()
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py", line 634, in _eval_line
self._start()
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py", line 456, in _start
self.__name, cmd, self._install_hints())
RuntimeError: Unable to start maple because the command 'maple -t'
failed.
In order to use the Maple interface you need to have Maple installed
and have a script in your PATH called "maple" that runs the
command-line version of Maple. Alternatively, you could use a remote
connection to a server running Maple; for hints, type
print maple._install_hints_ssh()
(1) You might have to buy Maple (http://webstore.maplesoft.com/).
(2) * LINUX: The maple script comes standard with your Maple
install.
* APPLE OS X:
(a) create a file called maple (in your PATH), with the
following contents:
#!/bin/sh
/Library/Frameworks/Maple.framework/Versions/Current/bin/
maple $@
(b) Save the file.
(c) Make the file executable.
chmod +x maple
* WINDOWS:
You must install Maple-for-Linux into the VMware machine
(sorry, that's
the only way at present).
swulf
On Sep 5, 9:34 pm, swulf <summitw...@gmail.com> wrote:
> I enter this line at the Sage prompt:
>
> val, err = numerical_integral(sqrt(cos(x)^2 + 1), 0, 2*pi)
>
> and I get an error, which is, in its entirety:
>
> Traceback (click to the left for traceback)
> ...
> the only way at present).
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/home/notebook/sage_notebook/worksheets/admin/8/code/227.py",
> line 6, in <module>
> print _support_.syseval(maple, ur'''val, err = numerical_integral
> (sqrt(cos(x)^2 + 1), 0, 2*pi)''', '/home/notebook/sage_notebook/
> worksheets/admin/8/cells/93')
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/server/
> support.py", line 370, in syseval
> return system.eval(cmd, sage_globals, locals = sage_globals)
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/expect.py", line 980, in eval
> return '\n'.join([self._eval_line(L, **kwds) for L in code.split
> ('\n') if L != ''])
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/maple.py", line 547, in _eval_line
> wait_for_prompt=wait_for_prompt).replace('\\\n','').strip()
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/expect.py", line 631, in _eval_line
> return self._eval_line_using_file(line)
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/expect.py", line 618, in _eval_line_using_file
> s = self._eval_line(self._read_in_file_command(tmp_to_use),
> allow_use_file=False)
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/maple.py", line 547, in _eval_line
> wait_for_prompt=wait_for_prompt).replace('\\\n','').strip()
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/expect.py", line 634, in _eval_line
> self._start()
> File "/usr/local/sage/local/lib/python2.6/site-packages/sage/
> interfaces/expect.py", line 456, in _start
> self.__name, cmd, self._install_hints())
> RuntimeError: Unable to start maple because the command 'maple -t'
> failed.
>
> In order to use the Maple interface you need to have Maple installed
> and have a script in your PATH called "maple" that runs the
> command-line version of Maple. Alternatively, you could use a remote
> connection to a server running Maple; for hints, type
> print maple._install_hints_ssh()
>
> (1) You might have to buy Maple (http://webstore.maplesoft.com/).
>
> (2) * LINUX: The maple script comes standard with your Maple
> install.
>
> * APPLE OS X:
> (a) create a file called maple (in your PATH), with the
> following contents:
> #!/bin/sh
> /Library/Frameworks/Maple.framework/Versions/Current/bin/
> maple $@
> (b) Save the file.
> (c) Make the file executable.
> chmod +x maple
>
> * WINDOWS:
> You must install Maple-for-Linux into the VMware machine
> (sorry, that's
> the only way at present).
>
> swulf
>
> On Sep 5, 8:15 pm, William Stein <wst...@gmail.com> wrote:
>
> > On Sat, Sep 5, 2009 at 8:11 PM, swulf<summitw...@gmail.com> wrote:
>
> > > Perhaps I spoke too soon... the numerical_integral command does not
> > > seem to work on my installation either - once again it appears to
> > > depend upon Maple.
>
> > Maple? The numerical_integral command certainly does not use Maple.
> > It just uses the GSL C library.
>
> > And when you say "does not work", what happens?
>
> > William
>
> > > swulf
>
> > > On Sep 5, 11:48 am, swulf <summitw...@gmail.com> wrote:
> > >> Hello,
>
> > >> I'm new to Sage and this group.
>
> > >> I have been doing some simple experimentation with integration in
> > >> order to get up to speed. One thing I attempted was to try and
> > >> calculate an integral, attempting to reproduce the problem described
> > >> on this page:
>
> > >>http://mathforum.org/library/drmath/view/52038.html
>
> > >> Here is how I gave the problem to Sage (V4.1.1 under Windows):
>
> > >> f=sin(x)
> > >> g=f.diff(x)
> > >> h=(sqrt(g^2+1))
> > >> j=integral(h,x,0,2*pi)
> > >> j
>
> > >> Here is the response from Sage:
>
> > >> integrate(sqrt(cos(x)^2 + 1), x, 0, 2*pi)
>
> > >> This looks like Sage can't perform the integration, and it seems the
> > >> sqrt is the problem, although it doesn't flag any sort of error. In
> > >> the web page I give above, the problem is solved with MAPLE... so I am
> > >> not sure why Sage has a problem with it?
>
> > >> I suspect I am missing something or doing something stupid. Can anyone
> > >> enlighten me please?
>
> > >> Thanks,
>
> > >> swulf
>
> > --
> > William Stein
> > Associate Professor of Mathematics
> > University of Washingtonhttp://wstein.org
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