Ok. I got it, it is a python issue. May be this is the better way to
do things !! :)
On Apr 22, 3:46 pm, Jason Grout wrote:
> On 04/22/2010 04:13 PM, pallab wrote:
>
> > Sorry I did not make it clear. I just defined S as
>
> > var('S')
> > At=S*x
> > S=
On Apr 22, 7:26 am, Jason Grout wrote:
> On 04/22/2010 06:02 AM, pallab wrote:
>
> > Thanks for your answer, it seems complicated :). I think it would have
> > been much easier if there is a way to specify the plot variables in
> > plots.
>
> > On Apr 22, 2:5
Thanks for your answer, it seems complicated :). I think it would have
been much easier if there is a way to specify the plot variables in
plots.
On Apr 22, 2:58 am, Mike Hansen wrote:
> On Thu, Apr 22, 2010 at 2:46 AM, pallab wrote:
> > How to specify variables in a plot. Say I want
How to specify variables in a plot. Say I want something like,
At=S*x
S=4
plot(At,0,2)
Question is that how to instruct Sage that I want to plot against 'x'.
In Mathematica this is conveniently done by
Plot[At,{x,0,2}]
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To u
Thanks. Will do.
On Apr 3, 12:19 pm, Alec Mihailovs wrote:
> On Apr 3, 2:32 pm, pallab wrote:
>
> > Is there any way to check whether a symbolic expression is a
> > derivative. Like,
>
> > isinstance(diff(f(x),x),"what to put?")
>
> > gives "
I got it :), thanks.
On Apr 3, 11:34 am, Mike Hansen wrote:
> On Sat, Apr 3, 2010 at 11:15 AM, pallab wrote:
> > let us do,
>
> > f=function('f',x)
> > expr=f(x)
> > expr.operands()
>
> > the out put is,
>
> > [x]
>
> > Is it
I mean...
I do not know. If it is already evaluated to cos(x) then it should be
false (not *true*). current "sympy" gives false, I think I would go
with it.
On Apr 3, 11:51 am, pallab wrote:
>
>
> On Apr 3, 11:36 am, "ma...@mendelu.cz" wrote:
>
> > What k
e(diff(sin(x),x),"what to put?")
>
> Robert
>
> On 3 dub, 20:32, pallab wrote:
>
> > Is there any way to check whether a symbolic expression is a
> > derivative. Like,
>
> > isinstance(diff(f(x),x),"what to put?")
>
> > gives "True"
Is there any way to check whether a symbolic expression is a
derivative. Like,
isinstance(diff(f(x),x),"what to put?")
gives "True"
and
isinstance(f(x),"what to put?")
gives false, assuming f is not a derivative itself.
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To
let us do,
f=function('f',x)
expr=f(x)
expr.operands()
the out put is,
[x]
Is it a bug?, I expect [f(x)].
using,
f=function('f',x)
expr=2*f(x)
expr.operands()
correctly gives,
[f(x),2]
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:T.y_0=trans_bc(eqn2,bc,f(x),x,0)
File "", line 1, in
File "/tmp/tmpKxA_KC/___code___.py", line 11, in
T.ode_solve(t_span=[_sage_const_0 ,_sage_const_1 ],num_points=_sage_const_100 )
File "", line 1, in
File "ode.pyx", line 531, in sage.gsl.
Is it possible to define substitution rule with undefined variables ?
like,
s={y:x}
where y and x are yet undefined.
thanks,
Pallab
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For
integrate(f(t),t,t2,t1).substitute({f(t):x})
will do.
On Mar 30, 3:22 am, Tobias Katz wrote:
> When I use substitute_function to declare a function within an existing
> equation, I get the following message:
>
> DeprecationWarning: Substitution using function-call syntax and unnamed
> arguments
elp.
> Best wishes,
> Rajeev
>
> On Mar 26, 11:06 am, dabu wrote:
>
> > Hi,
> > Many thanks. I will try to have a look.
> > best,
> > Pallab
> > On Mar 25, 1:05 pm, Jason Grout wrote:
>
> > > On 03/25/2010 10:25 AM, dabu wrote:
>
> > >
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