On Nov 12, 2008, at 5:52 PM, kcrisman wrote:
>> put those three lines in where indicated and it will be orders of
>> magnitude faster for most cases, plus will handle constants, lambda
>> functions, etc., automatically.
>>
>> fast_float is one of Sage's coolest "secrets".
Thanks :)
> That bring
If one does
sage: Ii.subs(pars).variables()
(x,)
so that is fine. However,
sage: RR(Ii.subs(pars)(x=-10))
Traceback (most recent call last):
...
TypeError
which tells you what the error is (not very helpful in this case). On
a hunch
sage: CC(Ii.subs(pars)(x=-10))
2.59329101030962e-14*I
so
> put those three lines in where indicated and it will be orders of
> magnitude faster for most cases, plus will handle constants, lambda
> functions, etc., automatically.
>
> fast_float is one of Sage's coolest "secrets".
>
That brings up a question I've had for a while. When is it good to
use
pong wrote:
> Here is my script
>
> def shaded_area_plot(f,g,c,d,a,b):
> step = 0.01
from sage.ext.fast_eval import fast_float
f = fast_float(f)
g = fast_float(g)
> vf = [(x,f(x)) for x in srange(a, (b+step), step)]
> vg = [(x,g(x)) for x in srange(b, (a-step), -step)]
> sha =
Here is my script
def shaded_area_plot(f,g,c,d,a,b):
step = 0.01
vf = [(x,f(x)) for x in srange(a, (b+step), step)]
vg = [(x,g(x)) for x in srange(b, (a-step), -step)]
sha = polygon(vf + vg, rgbcolor='grey')
return(plot(f, (c,d)) + plot(g, (c,d), rgbcolor='red') + sha)
Most l
I change the sequence of dots to size=2 and now the line looks better.
world + sum([point3d(v, color='red') for v in city_coords]) + sum
([point3d(v, size=2, color='green') for v in mydots])
The parametric_plot3d command seems a better way to do this but I am
not sure yet how to use it. I am wor
On Nov 10, 7:15 pm, cesarnda <[EMAIL PROTECTED]> wrote:
> that is the output I was expecting, but it is not the input I gave.
> Obviously,
> 1/x - 1/(x+1) = 1/(x*(x+1))
>
> but, if the right hand side can be done why the left hand side can't?
> This is the bug I was talking about...
Thanks for p
Thank you very much Stan, this was helpfull
I have more questions,
I get this message:
verbose 0 (3605: plot.py, _plot) WARNING: When plotting, failed to
evaluate function at 200 points.
verbose 0 (3605: plot.py, _plot) Last error message: ''
Why does it fail to evaluate ?
my datasheet:
#Defi
On Tue, Nov 11, 2008 at 3:15 AM, cesarnda <[EMAIL PROTECTED]> wrote:
>
> that is the output I was expecting, but it is not the input I gave.
> Obviously,
> 1/x - 1/(x+1) = 1/(x*(x+1))
>
> but, if the right hand side can be done why the left hand side can't?
> This is the bug I was talking about...
pong wrote:
> I defined a function which show the shaded area between the graphs of
> two functions over an interval (maybe such function already exist?).
> For example,
>
> plot_shaded_area(sin(x), cos(x), 1,2)
>
> show the shaded area between sine and cosine over [1,2]. Well, my
> script doesn
pong wrote:
> I defined a function which show the shaded area between the graphs of
> two functions over an interval (maybe such function already exist?).
> For example,
>
> plot_shaded_area(sin(x), cos(x), 1,2)
>
> show the shaded area between sine and cosine over [1,2]. Well, my
> script doesn
I defined a function which show the shaded area between the graphs of
two functions over an interval (maybe such function already exist?).
For example,
plot_shaded_area(sin(x), cos(x), 1,2)
show the shaded area between sine and cosine over [1,2]. Well, my
script doesn't work if I change cos(x) t
mabshoff wrote:
> comparing results from two different systems
> that ideally do not share any components is a good thing :)
And *that* is something that Sage lets you do that almost no one else
does. It is pretty easy and free to compare answers between axiom,
maxima, sympy, or if you have
On Nov 11, 2:38 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> On 11 Lis, 22:21, Robert Samal <[EMAIL PROTECTED]> wrote:
Hi,
> > Hi Minh,
>
> > > I think this issue has been fixed in sage-3.1.4. Under sage-3.1.4, the
> > > command
>
> > > sage: lim ( x*(sqrt(x^2)-sqrt(x))/sqrt(x^2 -x), x
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