Plotting the integer-and-fraction remainder of a function value modulo 360

[Kim Plofker]

How can I get Python to represent a value of a function in degrees, i.e., with values between 0 and 360, by taking the (non-integer) function expression mod 360?

That is, I have a function with non-integer values, called Longitude, which is defined in terms of the variable t. I just want to plot Longitude modulo 360 for a range of values of t: that is, for every value of t, plot the integer-AND-fraction remainder after dividing Longitude by 360.

But Python (in Sage) apparently won't let me use the int function or the // operator on functions defined in terms of a variable: I get a "cannot evaluate symbolic expression numerically" TypeError. How do I do this? There must be a simple way to tell Python that I want it to compute the value of Longitude for a given value of t and then take the integer-and-fraction remainder from dividing by 360.



Many thanks,
Kim
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20140409/18521a1b/attachment.html>