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2015-11-27 04:53:35 -0600 commented question Sharing files between Sage and Windows

Yes, this menu is there, but after clicking to item File->Save worksheet to a file... nothingh happens - almost nothing - in the bottom left there is some icon "filename.sws" - but that's all... Still it doesn't solve my problem, I can do anything with this file (if such file really exists).

2015-11-26 13:38:01 -0600 asked a question Sharing files between Sage and Windows

Hi, I am new to sage and now I have really strange question. My sage is running in Oracle VM because I have WIN7. Because I work at two places, I need to transfer the files between to computers. I want to copy and store worksheets from Sage Notebook. And this is the problem. I am not able to save my work properly using the Sage Notebook. I set up in Oracle VM the Shared Folder. Ok, but all I am able to do is to save some html of the worksheet. I would like to store the files .sws directly, not some dummy html. I was not able to find out something in manuals. How can I do this? Or is there another way? I don't want to use some cloud - only my flash-drive. For me it suffices to know how to save the worksheet file (.sws) into the shared folder. Thank You

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2015-11-26 07:32:15 -0600 asked a question Piecewise function of several variables and how to display it

Hi, I need to define a piecewise function of several variables. For a function of one variable I would use probably Piecewise. I would like to work with a function G of two variables t and s that is of this form:

def G(t,s):
    if (t < s):
        return 1
    else:
        return 0

Although this works, I would like to have a nice displaying of this function, like a function generated by Piecewise does. Is there another way how to define this function?

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2015-11-26 06:38:29 -0600 asked a question integration of matrix-valued function

Hi, I want to compute the (in)definite integral of matrix valued function, for example

var('x')
f =matrix([[x,1],[x^2,2]]);

The command

integrate(f,x,0,1)

doesn't work. I expect matrix as a result - integrated by elements

2015-11-26 06:38:28 -0600 asked a question integration of matrix valued function

Hi, I want to compute the (in)definite integral of matrix valued function, for example

var('x'), f =matrix([[x,1],[x^2,2]]);

The command

integrate(f,x,0,1)

doesn't work. I expect matrix as a result - integrated by elements