#3941: threading diff over lists to give the jacobian
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Reporter: jason | Owner: jason
Type: enhancement | Status: assigned
Priority: major | Milestone: sage-3.4.1
Component: calculus | Resolution:
Keywords: |
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Comment (by jason):
What about functions with codomain R^n where n>1? If these are
represented via a list, tuple, or vector, the code works from above (well,
let's add handling of vectors with the following:
{{{
def diff(f,*args):
if isinstance(f, (list, tuple)) or
sage.structure.element.is_Vector(f):
return [diff(component,*args) for component in f]
else:
if isinstance(args[0], (list, tuple)) or is_Vector(args[0]):
return [diff(f,variable) for variable in args[0]]
else:
return sage.all.diff(f,*args)
}}}
This wouldn't work with a .jacobian method---where would we put the
method?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3941#comment:6>
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