On Monday, April 30, 2012 8:11:29 PM UTC+8, yogesh wrote:
>
> Hello Sir,
>
> def symmetry(w):
> if(w==w(x=-x,y=-y)):
> print "symmetrical about origin"
> else:
> print "not symmetrical about origin"
>
> if(w==w(x=-x)):
> print "symmetrical about y axis"
> else:
> print "not symmetrical about y axis"
> if(w==w(y=-y)):
> print "symmetrical about x axis"
> else:
> print "not symmetrical about x axis"
> if(w==w(x=y,y=x)):
> print "symmetrical about y=x line"
> else:
> print "not symmetrical about y=x line"
>
>
> var('x y a')
> w=x^2+y^2-a^2
>
> html("<h2>Find the symmetry of a curve </h2>")
> symmetry(w)
>
> this is our function symmetry. We had included this into our sage test
> copy but when we try to call it from sage command prompt then it gives
> error that "global variable x is not defined" how to resolve this problem
> ??????/
>
> plz reply asap. We need it very urgent.
> Thanks
>
You can either
1. pass the variables into your function as in
def symmetry(w, x, y):
2. Declare x and y inside the function:
def symmetry(w):
x, y = var('x y');
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