On Friday, December 14, 2012 3:20:26 AM UTC+5:45, Aaron Meurer wrote:
>
> First off, what you are doing would not work, because Matrix slices to
> not provide "views" to the Matrix, like numpy arrays. So assigning to
> a slice would not work.
>
>
If you mean that modifying a slice doesn't mod
Something like a view will soon be necessary for my work. This will
probably be in MatrixExprs in a few months.
On Thu, Dec 13, 2012 at 3:35 PM, Aaron Meurer wrote:
> First off, what you are doing would not work, because Matrix slices to
> not provide "views" to the Matrix, like numpy arrays.
First off, what you are doing would not work, because Matrix slices to
not provide "views" to the Matrix, like numpy arrays. So assigning to
a slice would not work.
I agree that a slice should return a Matrix, though, to be consistant.
In the future, we may implement a view model. This would hel
Just use parametric plots (what chebfun is actually doing in your example)
plot_parametric(x, y, (v, 3, 5))
In sympy you are not forced to specify an interval for a symbol as in
`v=chebfun('c',[3,5])`. All symbols are considered belonging to the
complex numbers.
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You received this message bec
On Thu, Dec 13, 2012 at 8:55 PM, Shriramana Sharma wrote:
> Hello.
>
> In my program I am having to do this:
>
> PartDerivs [ - ( n + 1 ) : ] = PartDerivs [ - ( n + 1 ) : ] . subs ( {
> Ep ( 0 ) : 0, De ( n ) : 0 } )
>
> but this fails saying:
>
> AttributeError: 'list' object has no attribute 'su
hi, in Matlab i can define a function on a interval(use chebfun)
the code like this :
v=chebfun('c',[3,5])
x=sin(v)+cos(v)
y=sin(v)-cos(v)
plot(x,y)
then got a figure of x against y when v is on interval [3,5].
how to do this in sympy??
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You received this message because you are sub
hi, in Matlab i can define a function on a interval(use chebfun)
the code like this :
v=chebfun('c',[3,5])
x=sin(v)+cos(v)
y=sin(v)-cos(v)
plot(x,y)
then got a figure of x against y when v is in interval [3,5].
how to do this in sympy??
--
You received this message because you are sub
Hello.
In my program I am having to do this:
PartDerivs [ - ( n + 1 ) : ] = PartDerivs [ - ( n + 1 ) : ] . subs ( {
Ep ( 0 ) : 0, De ( n ) : 0 } )
but this fails saying:
AttributeError: 'list' object has no attribute 'subs'
There is a curious behaviour of Matrix w.r.t slicing:
In [1]: from sy
On Thu, Dec 13, 2012 at 6:17 PM, Bernardo Rocha <
bernardomartinsro...@gmail.com> wrote:
> c1 + r*(c2-c
>>> var('a1 a2 c c1 c2 r theta phi x y z', real=True)
(a1, a2, c, c1, c2, r, theta, phi, x, y, z)
>>> eqs=(Eq(x,(a1 + r*(-a1 + a2))*cos(phi)*cos(theta)),Eq(y,(a1 + r*(-a1 +
a2))*sin(phi)*cos(t
Hi,
I'm trying to create a simple script to given the (x,y,z) coordinates
compute the (r, theta, phi) coordinates.
The structure of the equations is
x = a(r) cos(theta) cos(phi)
y = a(r) cos(theta) sin(phi)
z = c(r) sin(theta)
where
a(r) = a1 + r*(a2-a1)
c(r) = c1 + r*(c2-c1)
If I instead use
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