jmcshan1's profile - activity

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2013-04-04 12:42:36 +0200	commented answer	Convert a text file into a matrix Nevermind, I got it: sage_eval(my_string, locals={'x':x})
2013-04-04 12:33:10 +0200	commented answer	Convert a text file into a matrix This does not seem to work with variable names, such as sage: my_string = '[[x, 3 - x],[x, 3+x]]' Is there a way to make sage_eval work with these variables?
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2013-04-02 12:42:35 +0200	asked a question	Convert a text file into a matrix I have a file with a list of elements inside the square of a Quadratic field, i.e. `QQ(sqrt[13])^2`. The file looks like `[[2 + sqrt[13],4 - 2*sqrt[13]],[2,sqrt[13]],...]`. I want to import this file into a single matrix over the field, in the previous example `F.<a> = QuadraticField(13)`. Currently, I read everything in as a string then convert to the matrix, but there must be an easier way to do this. I am somewhat new to python programming in general.