On 2012-10-21, LFS wrote:
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> yes - i finally saw that and took the call to the GDDinit out of the loop
> and this may be working, but I don't know how to explain this to the
> kiddies.
Just tell them the t
Oh I agree Dave for several reasons (not least of all that Excel is not
free, nor is it math based).
However I have to admit that I have not been happy with any non-Excel
program for just "teaching" probability and statistics.
Too complicated and the kiddies will give up. It took me 4 days to ge
On 21 October 2012 13:04, LFS wrote:
> yes - i finally saw that and took the call to the GDDinit out of the loop
> and this may be working, but I don't know how to explain this to the
> kiddies.
> Probably should have just stuck with Excel where I understand the
> generators. Too complicated by fa
yes - i finally saw that and took the call to the GDDinit out of the loop
and this may be working, but I don't know how to explain this to the
kiddies.
Probably should have just stuck with Excel where I understand the
generators. Too complicated by far.
Thanks everyone for your help.
On Sunday
On 2012-10-21, LFS wrote:
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> Actually Dmitrii with this change it is giving me exactly the same
> empirical data each time!
well, I just gave you a general framework for initializing and using a
pseudo-random
I am not sure, but your image looks like the bottom histogram, which is the
normal distribution.
The middle histogram is from the empirical data.
Linda
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Actually Dmitrii with this change it is giving me exactly the same
empirical data each time!
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Done. Thanks
On Sunday, 21 October 2012 13:35:02 UTC+2, Dima Pasechnik wrote:
>
> On 2012-10-21, LFS > wrote:
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> >
> > Thanks Dave - If I have a moment I will try the scatter plot method to
> > check.
On 2012-10-21, LFS wrote:
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>
> Thanks Dave - If I have a moment I will try the scatter plot method to
> check. That seems like a useful idea for student.
> (This was just for a class lesson on testing the CLT
Sorry Dmitrii to continually be typing your name wrong (using the
Macedonian spelling where I live :)). Linda
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Yes - I think Dimitri's solution is working! (I changed the published file
to his algorithm and upped the number of sets ns for the CLT and I also
seem to be now be getting good empirical data.)
Thank-you all! Linda
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On 10/21/2012 06:30 PM, LFS wrote:
Hiya Dmitrii
Thanks so much for your quick reply, but I am still getting the same
problem.
I go to excel and use a RandBetween[1,1000] and just sort them
according to my probability and all is good, i.e. the histogram of
the expected values is "norm
On 2012-10-21, David Kirkby wrote:
> On 21 October 2012 12:03, LFS wrote:
>> Hiya Dave,
>> What would the line of code look like to reseed it with the epoch thing each
>> time I call it?
>> Thanks so much,
>>
>> Linda
>
>
> http://www.sagemath.org/doc/reference/sage/misc/randstate.html
>
> says
>
Thanks Dave - If I have a moment I will try the scatter plot method to
check. That seems like a useful idea for student.
(This was just for a class lesson on testing the CLT and I am way over my
time allotment :))
Thanks to both you and Dimitri for feedback!
Linda
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On 21 October 2012 12:03, LFS wrote:
> Hiya Dave,
> What would the line of code look like to reseed it with the epoch thing each
> time I call it?
> Thanks so much,
>
> Linda
http://www.sagemath.org/doc/reference/sage/misc/randstate.html
says
If set_random_seed() is called with no arguments, t
On 21 October 2012 12:03, LFS wrote:
> Hiya Dave,
> What would the line of code look like to reseed it with the epoch thing each
> time I call it?
> Thanks so much,
>
> Linda
The truth is I don't know off hand. I've spent a lot of time porting
Sage to Solaris, but have not used it much at all. I'
One simple way to get a qualitative feel for the quality of random
numbers is to take them two at a tim, staring with the first two being
x1, y1. So you gererate:
x1, y1
x2, y2
x3, y3 etc
then plot a graph of x,y for all parts xn, yn
The graph should look like a scatter graph, with no obvious pa
Hiya Dave,
What would the line of code look like to reseed it with the epoch thing
each time I call it?
Thanks so much,
Linda
>
>
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On 21 October 2012 11:42, LFS wrote:
> Hiya Dimitri, It might actually be working. Not sure, but when I increased
> the number of sets ns, it does looks better. Still alot of repeats, but the
> histogram looks better. Linda
If there is a number of repeats, something is defnitely wrong. It
should
On 21 October 2012 11:30, LFS wrote:
> Hiya Dmitrii
> Thanks so much for your quick reply, but I am still getting the same
> problem.
I don't know if this the best way in Sage, but it is common practice
to seed the random number generator from the number of seconds since
the Epoch (1/1/1970). So
Hiya Dimitri, It might actually be working. Not sure, but when I increased
the number of sets ns, it does looks better. Still alot of repeats, but the
histogram looks better. Linda
On Sunday, 21 October 2012 12:30:13 UTC+2, LFS wrote:
>
> Hiya Dmitrii
> Thanks so much for your quick reply, but I
Hiya Dmitrii
Thanks so much for your quick reply, but I am still getting the same
problem.
> I go to excel and use a RandBetween[1,1000] and just sort them according
> to my probability and all is good, i.e. the histogram of the expected
> values is "normally distributed".
>
Here I keep getti
On 2012-10-21, LFS wrote:
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>
> Hiya guys!
> I have a function:
> def GDD(num,P):
> D=GeneralDiscreteDistribution(P)
> D.reset_distribution()
> L=[D.get_random_element() for _ in range(num)]
> re
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