[sage-support] Re: Error opening notebook with VMPlayer, come back to login prompt
It worked. Thanks! On Jul 2, 7:07 pm, William Stein wst...@gmail.com wrote: On Fri, Jul 3, 2009 at 2:00 AM, AGgoelan...@gmail.com wrote: Thanks for your very quick responses. It seems that the package is not being updated. I couldn't find a way of attaching file to the reply so I am providing a URL to a screenshot: http://picasaweb.google.com/lh/photo/yqYIgeyDKpC9Pmc_F5tQqw?authkey=G... Could the package you intended be mpir-1.2.p4? There is such a package listed athttp://www.sagemath.org/packages/standard/but I couldn't locate mpir-1.2.p2. Good thinking. Try mpir-1.2.p4 and see if it works. William --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] a question about the plotting in sage
I have some data from finite element calculating. I record the value of a variable at every node of each element. and I had plotted in matlab using the fellowing sentences: fill(X,Y,Stress_z); here the X and Y are the arrays of the x and y coordinates. and the Stress_z is the value of the variable at nodes. I want to know whether there is a function or how to do the same thing in Sage? Thanks a lot! --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: A little question about mod in function definition
So it seems there are (at least!) two classes of functions; those
which accept symbolic input, like sin:
m(x)=sin(x/2)
and those which don't, such as mod. I had not realized there was such
a distinction. Thank you all.
-Alasdair
On Jul 2, 5:15 am, William Stein wst...@gmail.com wrote:
On Wed, Jul 1, 2009 at 8:52 PM, Simon Kingsimon.k...@uni-jena.de wrote:
Hi Alasdair,
On 1 Jul., 13:00, David Joyner wdjoy...@gmail.com wrote:
I think the first tries to use Sage's symbolic expression machinery
but the second does not.
Yes, it seems so.
Using Sage, one should always be aware that some very handy/fancy
syntax is only available due to the Sage preparser.
E.g., some definitions such as f(x) = sin(x) or R.x=QQ[] are not
valid Python. But when you do this in Sage, it internally becomes
sage: preparse('m(x)=sin(x)')
'__tmp__=var(x); m = symbolic_expression(sin(x)).function(x)'
In your first approach, you get '__tmp__=var(x); m =
symbolic_expression(mod(x,Integer(10))).function(x)'
But mod(x,Integer(10)) gives an error, since x is a symbolic variable
and not an integer, and since mod is not symbolic, in contrast to
sin:
sage: type(sin)
class 'sage.functions.trig.Function_sin'
sage: type(mod)
type 'builtin_function_or_method'
For the record, at some point we may want to make mod work with
symbolic input.
I.e., I don't see any reason why at some point in the future we could
make the following make sense:
sage: x = var('x')
sage: f = mod(x, 3)
sage: f
Mod(x, 3)
sage: f.subs(x=5)
2
This is already how Mathematica works:
f := Mod[x,3]; f
Mod[x, 3]
f /. x - 5
2
William
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[sage-support] Re: a question about the plotting in sage
As you said, I read the help about the list_plot3d. It seems to be but not exactly what I want. I want the value of the variable to be draw by different colors, which the list_plot3d can't do. So can you give another favor? Thanks! On 7月3日, 下午6时26分, David Joyner wdjoy...@gmail.com wrote: Maybe list_plot3d is what you want? Type list_plot3d? (without the quotes) at the prompt to see examples. On Fri, Jul 3, 2009 at 6:03 AM, wxuyecwxu...@sohu.com wrote: I have some data from finite element calculating. I record the value of a variable at every node of each element. and I had plotted in matlab using the fellowing sentences: fill(X,Y,Stress_z); here the X and Y are the arrays of the x and y coordinates. and the Stress_z is the value of the variable at nodes. I want to know whether there is a function or how to do the same thing in Sage? Thanks a lot! --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] scipy binomial pmf
What is the syntax to get the binomial function in Scipy to calculate? I have tried stats.binom.pmf(1,10,.56,0) etc. Thanks for the help. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: scipy binomial pmf
On Fri, Jul 3, 2009 at 5:27 PM, Mikiethephantom6...@hotmail.com wrote: What is the syntax to get the binomial function in Scipy to calculate? I have tried stats.binom.pmf(1,10,.56,0) etc. Thanks for the help. (1) I don't understand the question. What does your question mean? (2) Possibly you should also ask on the scipy support list, where there are likely to be more scipy experts... -- William Stein Associate Professor of Mathematics University of Washington http://wstein.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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: jsmath
On Jul 3, 5:05 am, Mikie thephantom6...@hotmail.com wrote: Yes, I am not using the notebook. I have created an API(server) using a python script. It lets the user do interactive calculations from my website. The output is in a textarea and not pretty print as the notebook. I was wondering if jsmath could be used to do pretty print. My guess is that you should look at the jsMath web page for help; combining what's there with the html/jsmath output from Sage might be what you need. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: scipy binomial pmf
I am trying to use the binomial pmf function in Scipy. Forget the question I will write my own. Thanx On Jul 3, 9:32 am, William Stein wst...@gmail.com wrote: On Fri, Jul 3, 2009 at 5:27 PM, Mikiethephantom6...@hotmail.com wrote: What is the syntax to get the binomial function in Scipy to calculate? I have tried stats.binom.pmf(1,10,.56,0) etc. Thanks for the help. (1) I don't understand the question. What does your question mean? (2) Possibly you should also ask on the scipy support list, where there are likely to be more scipy experts... -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: scipy binomial pmf
This is also an excellent resource: How To Ask Questions The Smart Way, by the peerless Eric Steven Raymond: http://catb.org/esr/faqs/smart-questions.html On Jul 3, 8:17 pm, Ahmed Fasih wuzzyv...@gmail.com wrote: Writing your own is a good way to understand the implementation issues that we sometimes unthinkingly rely on, but for production code, it's always a good idea to default to the pre-packaged implementation. In this case, I think it's the standard issue with Scipy not understanding Sage types. This problem is described inhttp://wiki.sagemath.org/faq#Typeissuesusingscipy.2Ccvxoptornumpyfrom... sage: import scipy.stats as stats sage: stats.binom.pmf(1,10,.56,0) --- TypeError Traceback (most recent call last) snip TypeError: unsupported operand type(s) for *: 'numpy.ndarray' and 'numpy.bool_' There are numerous fixes to this problem, one of which is: sage: stats.binom.pmf(1r,10r,.56r,0r) 0.0034614823012532187 As an alternative, if you plan on doing everything in Scipy/Numpy and don't mind a fat-fisted approach, you may want to use IPython in Pylab mode: start Sage with sage -ipython -pylab and you don't have to worry about the preprocessor. On Jul 3, 3:30 pm, Mikie thephantom6...@hotmail.com wrote: I am trying to use the binomial pmf function in Scipy. Forget the question I will write my own. Thanx On Jul 3, 9:32 am, William Stein wst...@gmail.com wrote: On Fri, Jul 3, 2009 at 5:27 PM, Mikiethephantom6...@hotmail.com wrote: What is the syntax to get the binomial function in Scipy to calculate? I have tried stats.binom.pmf(1,10,.56,0) etc. Thanks for the help. (1) I don't understand the question. What does your question mean? (2) Possibly you should also ask on the scipy support list, where there are likely to be more scipy experts... -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: a question about the plotting in sage
If you can give a minimal example generating X, Y, and Stress_Z in Sage or Numpy, we'll be in a better position to reproduce the Matlab output. Also, check these fine 3d plotting examples for Matplotlib: http://www.scipy.org/Cookbook/Matplotlib/mplot3D all the examples will work in Sage since sage includes Matplotlib. Also consider asking the Matplotlib community for assistance. On Jul 3, 7:12 am, wxuyec wxu...@sohu.com wrote: As you said, I read the help about the list_plot3d. It seems to be but not exactly what I want. I want the value of the variable to be draw by different colors, which the list_plot3d can't do. So can you give another favor? Thanks! On 7月3日, 下午6时26分, David Joyner wdjoy...@gmail.com wrote: Maybe list_plot3d is what you want? Type list_plot3d? (without the quotes) at the prompt to see examples. On Fri, Jul 3, 2009 at 6:03 AM, wxuyecwxu...@sohu.com wrote: I have some data from finite element calculating. I record the value of a variable at every node of each element. and I had plotted in matlab using the fellowing sentences: fill(X,Y,Stress_z); here the X and Y are the arrays of the x and y coordinates. and the Stress_z is the value of the variable at nodes. I want to know whether there is a function or how to do the same thing in Sage? Thanks a lot! --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
