[sage-support] Re: integral of exp(-x^2)*cos(x) from -pi to pi is complex?
On Oct 8, 10:05 am, achrzesz achrz...@wp.pl wrote: The exact integral 1/2*(erf(pi - 1/2*I) + erf(pi + 1/2*I))*sqrt(pi)*e^(-1/4) contains *real* expression (erf(pi - 1/2*I) + erf(pi + 1/2*I)) but maxima/sage can't check that it is real In WolframAlpha one can check that Im[Erf[Pi-1/2*I]+Erf[Pi+1/2*I]] iz zero Andrzej Chrzeszczyk Fortunately I was wrong: sage: w=integrate(exp(-x^2)*cos(x),(x,-pi,pi))/pi sage: w.imag().full_simplify() 0 -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] How to set 'location' in Normal distribution?
Hi everybody,
I am making a revision of ticket #11572 and wanted to become familiar
with the way that Sage handle probability distributions . I realized
that the normal distribution is implemented as follows in Sage:
sage: T=RealDistribution('gaussian',sigma=20)
Is there any reason why this class does not include the mean as a
parameter for the gaussian distribution?
Are we supposed to use scipy.stats.norm instead?
Thanks in advance
Jose
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] finding the closed form for a linear second order recurrence sequence
Dear all,
I am new to SAGE (since today) but am excited about learning how to use it!
I'm wondering is it possible to use SAGE to find the close form for a linear
second order recurrence sequence?
For example, can SAGE find a closed form for an equation such as:
u_{n+2} = 2 * u_{n+1} + 8 * u_{n}, where we know u_{0} = 2 and u_{1} = 7 ?
I will be very grateful for any help, or if you can point me towards the
right documentation page to look at.
Kind Regards,
Avril
Avril Coghlan
Cork, Ireland
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
Re: [sage-support] finding the closed form for a linear second order recurrence sequence
On Sun, Oct 23, 2011 at 4:51 PM, Avril Coghlan
avril.cogh...@googlemail.com wrote:
Dear all,
I am new to SAGE (since today) but am excited about learning how to use it!
I'm wondering is it possible to use SAGE to find the close form for a linear
second order recurrence sequence?
For example, can SAGE find a closed form for an equation such as:
u_{n+2} = 2 * u_{n+1} + 8 * u_{n}, where we know u_{0} = 2 and u_{1} = 7 ?
I will be very grateful for any help, or if you can point me towards the
right documentation page to look at.
Your question might be addressed in this sage-support thread:
http://www.mail-archive.com/sage-support@googlegroups.com/msg17045.html
Kind Regards,
Avril
Avril Coghlan
Cork, Ireland
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] Graphics Array and one function with different constants.
Hi, I have one function that I need to plot in an array with different values for two constants. I would like to only have to repeat the function once, and go off of a string of different variables to produce this array. Is that even possible in Sage? Or am I stuck with repeating the function over and over again for the graphics array? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: finding the closed form for a linear second order recurrence sequence
Hi David, hi Avril,
On 23 Okt., 23:18, David Joyner wdjoy...@gmail.com wrote:
On Sun, Oct 23, 2011 at 4:51 PM, Avril Coghlan
avril.cogh...@googlemail.com wrote:
Dear all,
I am new to SAGE (since today) but am excited about learning how to use it!
I'm wondering is it possible to use SAGE to find the close form for a linear
second order recurrence sequence?
For example, can SAGE find a closed form for an equation such as:
u_{n+2} = 2 * u_{n+1} + 8 * u_{n}, where we know u_{0} = 2 and u_{1} = 7 ?
I will be very grateful for any help, or if you can point me towards the
right documentation page to look at.
Your question might be addressed in this sage-support
thread:http://www.mail-archive.com/sage-support@googlegroups.com/msg17045.html
Probably the thread is answering Avril's question.
But the last post in the thread is Nathann saying:
Should we create a ticket for this ? I'd have done it if not for my
doubt on the section I should pick for this... :-)
Is there a ticket?
Cheers,
Simon
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] Re: Graphics Array and one function with different constants.
On Oct 23, 11:33 pm, Eric Kangas eric.c.kan...@gmail.com wrote: Hi, I have one function that I need to plot in an array with different values for two constants. I would like to only have to repeat the function once, and go off of a string of different variables to produce this array. Is that even possible in Sage? Or am I stuck with repeating the function over and over again for the graphics array? For example: sage: graphics_array([[plot(sin(k*x/m),(x,0,pi)) for k in [1,2]] for m in [1,2]]).show(frame=True,axes=False) A Ch -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
