Thank you for that Robert!  Your explanations are very sophisticated.
I will post a reply as soon as I am done trying to understand what you
have written. I think I am starting to understand the dynamics very soon :-)

I would assme that If we start from the end ie period 10 then we have a 0.5 probability
of getting a head and 0.5 probability of getting a tail.

In the 9th period 10 we would also have a 0.5 probability
of getting a head and 0.5 probability of getting a tail.   hence

0.5/(1-0.5) + 0.5/(1-0.5) =2

I know that this is wrong but I dont understand where you get the above equations from
and what probabilities and "odds" we are talking about...

I would assme that If we start from the end ie period 10 then we have a 0.5 probability
of getting a head and 0.5 probability of getting a tail.

In the 9th period 10 we would also have a 0.5 probability
of getting a head and 0.5 probability of getting a tail.   hence

0.5/(1-0.5) + 0.5/(1-0.5) =2

I know that this is wrong but I dont understand where you get the above equations from
and what probabilities and "odds" we are talking about...

Thank you for that Robert. I also thought about that k might simply be binomial(k,s).
What I dont understand is the second point you are trying to make ii)
Could you please explain in much more extensivly.

Where do you get these equations from? Can you derive it in Maple code?
Can you provide me with some Maple code that sum the odds ? I am
having a difficult understanding what "odds" should be summed...hummm

Thank you for that Robert. I also thought about that k might simply be binomial(k,s).
What I dont understand is the second point you are trying to make ii)
Could you please explain in much more extensivly.

Where do you get these equations from? Can you derive it in Maple code?
Can you provide me with some Maple code that sum the odds ? I am
having a difficult understanding what "odds" should be summed...hummm

I love these kind of post :-) Randomness vs non randomness etc
Hopefully you will add some of these procedures such as the Wald-Wolfowitz
Runs test to the default Maple installation, well documented of course.
These are the kind of things that I my opinion really adds value....

"Most people don't like lots of updates - it's a hassle. 
They also don't like to buy 2 year old software products."


This is certanly true when it comes to Bill Gates products (microsoft).
A new update everyday. Someone should explain the notion; Do a proper
jobb to begin with to him.....

In Maples case the opposite is true. A fly-through-view feature does not
represent a major improvement to the software nor does it validate a
new software release. There is a difference between money making releases
and releases where major innovation has taken place...

@Will  I am not sure I like the new MaplePrimes :-(
This breaking up of conversations is not good at all.

I dont mind reading a very long post as long as it is sequential
in nature. Now some answers floates up on top while other remain at the
bottom making it difficult to follow along with conversation

I also think that this branching and reorganising makes it very
difficult to read such sequation coversation and it make it
impossible to extract the informtion in one place having to visit
many different webpages to follow along with the discussion.
Is this really a good thing ?

 

@Will  I am not sure I like the new MaplePrimes :-(
This breaking up of conversations is not good at all.

I dont mind reading a very long post as long as it is sequential
in nature. Now some answers floates up on top while other remain at the
bottom making it difficult to follow along with conversation

I also think that this branching and reorganising makes it very
difficult to read such sequation coversation and it make it
impossible to extract the informtion in one place having to visit
many different webpages to follow along with the discussion.
Is this really a good thing ?

 

ok thank you for that !!

Now can anyone provide me with some working code andinstructions
for these "small shell scripts" so I can call goggle finance in parallel from or outside Maple ?

Otherwise I have to scrap my application because I am not going to have a
downloading function in Maple that takes 2 minuts to execute he he

ok thank you for that !!

Now can anyone provide me with some working code andinstructions
for these "small shell scripts" so I can call goggle finance in parallel from or outside Maple ?

Otherwise I have to scrap my application because I am not going to have a
downloading function in Maple that takes 2 minuts to execute he he

@ Joel Riel
can I interpret you "small shell script test" as evidence that Maple has the problem (bottleneck)
and not the google finance webpage?

I have also considered the notion that google finance might put a cap on the download speed
but I have seen other application download from yahoo finance/google finance much faster than
currently possible in Maple which to me indicate that the bottleneck is in Maple.

Joe, these script's that you are talking about. Can you call them from Maple? 
Could you upload the code for these parallel scripts so I can use them in my application?
With clear reference to the source of course :-) I would probably also need some instructions
on how you can access such data from Maple....

My main goal is to be able to provide the ticker symbols in Maple and the access this google
finance data very fast from within Maple. That preferably involves making the call to google finance
in parallel to minimize bottlenecks. The parallel downloading could be done outside
Maple given that no 3-rd party software is involved ie you need to install this and this bla bla

@ Joel Riel
can I interpret you "small shell script test" as evidence that Maple has the problem (bottleneck)
and not the google finance webpage?

I have also considered the notion that google finance might put a cap on the download speed
but I have seen other application download from yahoo finance/google finance much faster than
currently possible in Maple which to me indicate that the bottleneck is in Maple.

Joe, these script's that you are talking about. Can you call them from Maple? 
Could you upload the code for these parallel scripts so I can use them in my application?
With clear reference to the source of course :-) I would probably also need some instructions
on how you can access such data from Maple....

My main goal is to be able to provide the ticker symbols in Maple and the access this google
finance data very fast from within Maple. That preferably involves making the call to google finance
in parallel to minimize bottlenecks. The parallel downloading could be done outside
Maple given that no 3-rd party software is involved ie you need to install this and this bla bla

DuncanA I give you a A+ for mentoring and support. Excellent stuff!
Could not have done it without your input and expertice.

I have to wait until sunday to test your worksheets on my work computer (4 core's).
On my home computer kernelopts(numcpus)=2 the worksheet "counting 7s" I get the follow:

X1()= 9.9 seconds

X2()+X3() = 10.8

Ha, ha this is not what I was expecting !!  After all that effort and mentoring from your part
the solution is far from optimal. X1() has to do twice the work and he does it faster than
X2()+X3() that individually has to do 50% of the workload since they run in parrallel.
Why is the result so bad?


The speed for the second worksheet "Importing Quotes" is not that impressive either.
There is little difference between making the call sequentially or in parallel both takes
around 5 seconds for 6 different securities. For the parallel verion it is the Wait(id1, id2...)
that takes the longest time to run....these Create(X(...)) are very fast...hummm

DuncanA I give you a A+ for mentoring and support. Excellent stuff!
Could not have done it without your input and expertice.

I have to wait until sunday to test your worksheets on my work computer (4 core's).
On my home computer kernelopts(numcpus)=2 the worksheet "counting 7s" I get the follow:

X1()= 9.9 seconds

X2()+X3() = 10.8

Ha, ha this is not what I was expecting !!  After all that effort and mentoring from your part
the solution is far from optimal. X1() has to do twice the work and he does it faster than
X2()+X3() that individually has to do 50% of the workload since they run in parrallel.
Why is the result so bad?


The speed for the second worksheet "Importing Quotes" is not that impressive either.
There is little difference between making the call sequentially or in parallel both takes
around 5 seconds for 6 different securities. For the parallel verion it is the Wait(id1, id2...)
that takes the longest time to run....these Create(X(...)) are very fast...hummm