Wow, Jack, that is one awesome and simple module...thank you so much! I am
happily storing and accessing all the arrays I could ever want :)
Thanks to all for the quick assistance!
On Fri, Mar 18, 2011 at 4:24 PM, Jack Trades wrote:
>
> On Fri, Mar 18, 2011 at 5:21 PM, Jon Herman
on windows, and doesn't require escaping ("/foo/bar").
>
> On Fri, Mar 18, 2011 at 2:56 PM, Jon Herman wrote:
>
>> Jack,
>>
>> thanks.
>>
>> Alright, so what I did is create a file called hello.txt with a single
>> line of text in ther
t the following error: IOError: [Errno 13] Permission denied: 'f'
If I open to read, I get: IOError: [Errno 2] No such file or directory: 'f'
Can anyone explain to me why this happens?
On Fri, Mar 18, 2011 at 3:50 PM, Jack Trades wrote:
>
> On Fri, Mar 18, 2011 at 4:33
Hello all,
I am pretty new to Python and am trying to write data to a file. However, I
seem to be misunderstanding how to do so. For starters, I'm not even sure
where Python is looking for these files or storing them. The directories I
have added to my PYTHONPATH variable (where I import modules f
ize for asking your time for such a
beginner's oversight...I'll be fluent in Python some day ;-)
On Mon, Mar 7, 2011 at 5:34 PM, Robert Kern wrote:
> On 3/7/11 2:52 PM, Jon Herman wrote:
>
>> It really is exactly the same process, but sure. Below is my Matlab
>> translat
Thanks Terry! Of course, speed is not my main concern at this point and I'm
more worried about precision...would you have some input on this discussion?
:)
Jon
On Mon, Mar 7, 2011 at 2:35 PM, Terry Reedy wrote:
> On 3/7/2011 1:59 PM, Jon Herman wrote:
>
>> And for the sak
x=xwrk + dt * Xtemp2;
t=twrk+dt;
On Mon, Mar 7, 2011 at 1:50 PM, Chris Rebert wrote:
> >>> On Fri, Mar 4, 2011 at 2:32 PM, Jon Herman
> wrote:
> >>>>
> >>>> I am new to the Python language and writing a Runge-Kutta-Fellberg
> 7(8)
&
And for the sake of additional completeness (I'm sorry I didn't think of all
this in one go): my derivative function in Python produces results that
agree with MATLAB to order e-16 (machine precision), so the error is
definitely building up in my integrator.
On Mon, Mar 7, 2011 at 11:
-mu)*(X[0]+mu)/r1**3-mu*(X[0]-(1-mu))/r2**3
Ay= X[1]-2*X[3]-(1-mu)*X[1]/r1**3-mu*X[1]/r2**3
Az= -(1-mu)*X[2]/r1**3-mu*X[2]/r2**3
XDelta=array([X[3], X[4], X[5], Ax, Ay, Az])
return XDelta
On Mon, Mar 7, 2011 at 11:50 AM, Jon Herman wrote:
> Sorry Robert, I'd missed y
Sorry Robert, I'd missed your post when I just made my last one. The output
I am getting in Python looks as follows:
array([ 9.91565050e-01, 1.55680112e-05, -1.53258602e-05,
-5.75847623e-05, -9.64290960e-03, -8.26333458e-08])
This is the final state vector, consisting of 6 states (p
mp2+c[l]*k[:,l]
X=Xold + dt * Xtemp2
t=told+dt
Xstore=vstack((Xstore,X))
tstore=vstack((tstore,t))
if abs(tf-t)< 1e-14:
print('At tf')
break
On Fri, Mar 4, 2011 at 6:46 PM, Jon Herman wrote:
> Actually,
2011 at 4:49 PM, Santoso Wijaya wrote:
> Have you taken a look at numpy? [1] It was written for exactly this kind of
> usage.
>
> ~/santa
>
> [1] http://numpy.scipy.org/
>
>
> On Fri, Mar 4, 2011 at 2:32 PM, Jon Herman wrote:
>
>> Hello all,
>>
>>
Hello all,
I am new to the Python language and writing a Runge-Kutta-Fellberg 7(8)
integrator in Python, which requires an extreme numerical precision for my
particular application. Unfortunately, I can not seem to attain it.
The interesting part is if I take my exact code and translate it to Matl
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