Mailman 3 November 2008 - SciPy-User

scikits trac
by Timmie 11 Nov '08

11 Nov '08

Hello, is there any option to tell the trac installation at http://scipy.org/scipy/scikits to send me emails if there is a status change or new comment for the issues I am involved (as reporter, commenter)? I have only found the option to change the password. Thanks ind advance, Timmie

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Need new spam cleaner on scipy.org
by Robert Kern 11 Nov '08

11 Nov '08

I've been deleting all of the spam on the www.scipy.org wiki for some time now. I'm done. If you would like to jump in, please do so. If you need permissions to use the "Delete Page" and "Remove Spam" actions, let me know, and I will give them to you. If you have a better idea how to manage the spam, please coordinate with Jarrod. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco

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audiolab
by Nils Wagner 10 Nov '08

10 Nov '08

Hi all, How do I write numpy arrays to sound files ? Nils

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optimize.bisect
by Nils Wagner 10 Nov '08

10 Nov '08

Hi all, how can I use optimize.bisect if the function f is only given at discrete points instead of a continuous function like sin(x) ? Cheers, Nils

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Event handling in odeint
by Nils Wagner 10 Nov '08

10 Nov '08

Hi all, Is it possible to handle events in odeint, e. g. http://books.google.de/books?id=UX61pYtpI40C&pg=PA254&lpg=PA254&dq=st%C3%BC… page 256 Nils

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cephes.pbdv test fails
by Xavier Gnata 08 Nov '08

08 Nov '08

Hi, On my box, from scipy.special import * import scipy.special._cephes as cephes cephes.pbdv(1,0) returns (0.0, 1.0) As a result, assert_equal(cephes.pbdv(1,0),(0.0,0.0)) from "/usr/lib/python2.5/site-packages/scipy/special/tests/test_basic.py",line 357 fails. First can someone reproduce this bug? I'm using ubuntu intrepid 64bits. Second, if my understanding of pbdv is supposed to do, (0.0, 1.0) is the correct answer. http://mathworld.wolfram.com/ParabolicCylinderFunction.html Xavier

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Re: [SciPy-user] spreadsheet data visualisation app
by David Joyner 08 Nov '08

08 Nov '08

Unfortunately, the intrepid ibex ubuntu version of matplotlib seems to be too old, though pygtk and friends is easy using apt-get. I actually prefer to use matplotloib within Sage (as in, www.sagemath.org), but there pygtk is not easy for me to install. If your comment below says gtktools is not needed, then I don't understand how to use matplotlib to display a csv file. Is there a different command you had in mind? ---- Original message ---- >Date: Sat, 8 Nov 2008 07:07:26 -0600 >From: "John Hunter" <jdh2358(a)gmail.com> >Subject: Re: [SciPy-user] spreadsheet data visualisation app >To: "SciPy Users List" <scipy-user(a)scipy.org> > >On Sat, Nov 8, 2008 at 6:53 AM, David Warde-Farley <dwf(a)cs.toronto.edu> wrote: > >> without error at the python prompt. Hopefully the matplotlib package >> for Ubuntu has the GTK backend built in and they just forgot to tag >> the dependency; if not, you may be stuck compiling from source (which >> admittedly is not hard). > >Actually, you do not necessarily need to use a gtk* backend to use >this feature. The gtktools are just things I use when embedding >matplotlib in gtkapps, but the rec2gtk view is not dependent on any >mpl backend as it simply creates a gtk treeeview in a gtk scroll >window from a rec array. So yes, he will need to install pygtk, but >shouldn't have any problems if he simply wants to use rec2gtk from the >python shell or embedded in a gtk app. > >There is one caveat to this -- if you want to use this feature >interactively from the ipython shell and use pylab at the same time, >then you will need a gtk backend. Eg in the example I posted, when I >did rec2gtk from the ipython shell, that only works properly if >ipython is in gthread mode, which it will be if you are running -pylab >with a gtk* backend. > >JDH >_______________________________________________ >SciPy-user mailing list >SciPy-user(a)scipy.org >http://projects.scipy.org/mailman/listinfo/scipy-user

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Fitting Problem with line in 3D-space
by Charles Monty Burns 08 Nov '08

08 Nov '08

Hello, I am trying to get an axis of a cylinder in 3D-space using the leastsq method. My modell-equation is: \vec u \times (\vec r - \vec r_0) = \vec 0 u ... the direction vector r ... the independent vector r_0 ... one position vector on the line Can somebody tell me how to construct the functions leastsq is need? With simple function like y=x*... its very simple ... but not with that line Greetings

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spreadsheet data visualisation app
by Timmie 08 Nov '08

08 Nov '08

Hello, is there any application that I can use view numpy arrays in a tabular / spreadsheet like manner? Although I know that there may be large arrays which make it difficult for such a application to work properly, this can sometimes be desireable for validating calculation results. Especially when working interactively (i. e. using Ipython). I imagine something like: arr = np.arrange(0,10) array.sheet(arr) => similar to pylab.show() an application like the spreadsheet on http://zetcode.com/wxpython/skeletons/ could then pop up visualising my array. The only app I can currently imagine to do such tasks would be Resolver One: http://www.resolversystems.com/products/resolver-one/ but that application is based on IronPython. Kind regards, Timmie

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About Random Number Generation
by Wu, Kejia 07 Nov '08

07 Nov '08

Hi all, I tried the example code here: http://numpy.scipy.org/numpydoc/numpy-20.html#71863 But failed: -------------------------------------- rng.py, line 5, in <module> import RNG ImportError: No module named RNG -------------------------------------- Any suggestion? Thanks at first. Also, can any body tell me whether the random number algorithm in RNG package is a pseudorandom one or a real-random one? And is there an available implementation for Monte Carlo method in NumPy? Thanks a lot for any reply. Regards, Kejia

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