Michele's profile - activity

I see that sometimes when building sage with the commands

git pull
make

the majority of time is employed in building the documentation. Actually I'm not interested in building the documentation on my machine (I usually have an internet connection and I usually browse the documentation online).

Is it possible to ignore the documentation when building sage? How can I do that?

A ticket has been opened here http://trac.sagemath.org/sage_trac/ticket/13892

Thanks, I'll try. I visited the link you indicated but it's not immediate for me to understand how to open an issue. As soon I have more time I'll definitely try!

Is there a way to cache computations already done in a latex file using sagetex so that, for example, if I add a Sage code line in foo.tex when I run sage foo.sagetex.sage the computation starts from that line and not from the beginning?

The best thing would be that when one uses sagetex, Sage remembers what formulas are already computed and stored in foo.sout, and recomputes them only when they are modified. Do you think it's possible?

Thanks!

Here are a few:

1. It's the version installed in Sage 5.2, and it's the current active codebase. Not switching requires you to install old code that is no longer really maintained.

2. Vastly improved scalability

3. OpenID

What are the major advantages of the migration to the flask notebook?

I just get to a solution by myself... My problem was the impossibility to plot because of numerical errors that turns my (expected) real values into complex numbers with an imaginary part extremely small.

I used the fantastic function "list_plot3d". For example:

var ('x y')
f = sqrt(1+x+y)
list = []
for n in [-2.0,-1.9..,2.]:
    for m in [-2.0,-1.9..,2.]:
        list.append((n,m,real(f(x=n,y=m))))
show(list_plot3d(list))

It's not difficult to modify the above code if one wants to really ignore complex numbers while plotting (that is indeed what Matlab automatically does).

Is there any possibility to have a 3d plot done in a way that if the expression to be plotted returns a complex number, this is not plotted. In particular I'm referring to this feature in Matlab: when you try to plot in 3d an expression which in his domain has both real and complex values, it returns the plot only when the values are real. In addition Matlab prints a Warning: "Imaginary parts of complex X, Y, and/or Z arguments ignored".

Thanks! (tell me if it's not clear, I'll explain better...)