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2010-12-31 19:03:50 +0100	commented answer	Numerical approximation of symbolic equation Thank you for all the hard work. This definitely looks promising. I will experiment with it to see how it goes. It seems to me that if this sort of thing was implemented generally it would make sage a much more attractive package.
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2010-12-30 18:51:37 +0100	asked a question	Numerical approximation of symbolic equation What I would like to do is the following: `sage: var('theta') theta sage: theta=25units.angles.degree sage: print theta 25degree sage: a=sin(theta) sage: print a sin(25*degree)` At this point, I type 'a.' and tab and in the popup list of functions I find numerical_approx. So I type in: `sage: a.numerical_approx() Traceback (click to the left of this block for traceback) ... TypeError: cannot evaluate symbolic expression numerically` Okay, it would appear that adding the units to theta turns it into a symbolic variable which turns my expression a into a symbolic expression. But what I would like to do is enter my angle theta in either degrees or radians and get a numerical approximation of the answer based on the units of the input. Is there a clean way to do this?