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2018-06-13 00:39:51 +0100 asked a question How do I normalize the columns of a matrix?

How do I normalize the columns of a matrix?

such as $A = matrix(5,5,[\text{some numbers}])$

2018-06-12 22:53:06 +0100 asked a question Expand not working

image description

I multiplied some matrices, as seen in the picture to get a 1 by 1 matrix. I tried to expand the contents, but it didn't work. I had to copy and paste the contents. Why didn't it work?

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2018-04-23 04:12:35 +0100 asked a question Add on other packages

I wanted to be able to use the python "uncertainties" package in the sage notebooks. I have sage installed on windows. The sage terminal said pip and easy_install did not have necessary permissions. In fact, the sage terminal itself did not have write access to the packages folder.

How do I install packages like 'uncertainties'?

2018-04-23 00:19:11 +0100 commented answer Display a graphics object with multiple primatives

yes, B is a matrix, but why doesn't my code work?

2018-04-23 00:06:12 +0100 asked a question How to display all the symbolic variables and functions?

I have already declared a lot of stuff. How do I see what is already declared. something like: show (variables()) and show(functions()).

Something analogous to assumptions(). And why doesn't vars() work?

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2018-04-21 01:04:30 +0100 asked a question Display a graphics object with multiple primatives

I'm trying to show how a set of lines changes with a matrix transformation. The part i am having trouble with is:

 g=Graphics()

 for c in range(10):

     g.add_primitive(parametric_plot(B*vector([x,c])  , (x, 0, 2*pi)))  

 show(g)

Because it doesn't plott the lines like i wanted but instead gives me

'Graphics' object has no attribute 'options'