sage-support Google Group

Re: [sage-support] Tooltips on a plot

2009-07-04T11:11:51Z

There is no way to currently do that using matrix_plot.
If I were you, I would write my own HTML output of a matrix and use
the HTML <a href="" alt="tooltip">299</a> tag. You can use the Sage
command html(...) to output html.

--
William Stein
Associate Professor of Mathematics
University of Washington

Re: [sage-support] Re: Matrix assignment oddity

2009-07-04T11:09:10Z

The behavior below is not at all inconsistent with what you just
explained. When you write "M=2" below you are not changing M, you are
making the variable M refer at a different object, namely 2. That's
no different than writing "b=random_matrix(2)" in the above example,
then wondering why a didn't change.

Re: [sage-support] Matrix assignment oddity

2009-07-04T08:29:55Z

Hi Alex,
That is expected, as it is a Python issue, not an issue with Sage. In
the above code sample, both a and b refer to the same object. What you
want is to make a copy of the object that a refers to.
Yes. Use the command copy() or deepcopy(). In the following session, I
make a copy of the matrix A. In this way, changing the copy doesn't

Matrix assignment oddity

2009-07-04T08:07:05Z

Hi,

The following assignment behaves unexpectedly:

a=matrix(2) #makes a zero matrix
b=a
b[0,1]=2

One would expect a to stay zero, and only b to change to [0 2 0 0],
but a changes as well!
Is there a way to leave a fixed when changing b?
If a and b were numbers, changing b does not change a as well, as one

Tooltips on a plot

2009-07-04T06:08:09Z

Hey,

I am currently designing an interactive program that demonstrates the
Sieve of Eratosthenes. It displays a grid of numbers, created using
the matrix_plot function.

I was hoping to include some code that will allow tooltips to appear
when the cursor moves over certain numbers in the grid. Is there any

Re: a question about the plotting in sage

2009-07-04T00:29:27Z

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:
[link] all the examples will
work in Sage since sage includes Matplotlib.

Re: scipy binomial pmf

2009-07-04T00:19:12Z

This is also an excellent resource: "How To Ask Questions The Smart
Way," by the peerless Eric Steven Raymond:
[link]

Re: scipy binomial pmf

2009-07-04T00:17:44Z

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 in

Re: scipy binomial pmf

2009-07-03T19:30:30Z

I am trying to use the binomial pmf function in Scipy. Forget the
question I will write my own.
Thanx

Re: jsmath

2009-07-03T15:43:14Z

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.

Re: [sage-support] scipy binomial pmf

2009-07-03T15:32:00Z

(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...

scipy binomial pmf

2009-07-03T15:27:12Z

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.

Re: jsmath

2009-07-03T12:05:03Z

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".

Re: a question about the plotting in sage

2009-07-03T11:12:30Z

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!

Re: [sage-support] a question about the plotting in sage

2009-07-03T10:26:52Z

Maybe list_plot3d is what you want? Type "list_plot3d?" (without the
quotes) at the prompt to see examples.