Re: [sbml-arrays] Priority of events

[Jacob B. <jac...@gm...>]

So Lucian,

What you are pointing out may be exactly what I need.

I need events that use the same instruction line which is in the trigger to
fire in random order. The randomness is important since it allows
situations where a person has an MI before a Stroke or a Stroke before an
MI where both events have their own probability.

I was hoping to handle it later on by assigning priority a random number -
for now it is not that important - and for debug purposes, I need something
I can follow - the code is convoluted enough.

By the way, do you want to be in the discussion where I send code to
Leandro? You were very helpful so far.

Yet you have a good point that we will revisit - please remember it and
raise it again in a few weeks. It will help me remember.

              Jacob



On Sat, May 27, 2017 at 10:45 AM, Jacob Barhak <jac...@gm...>
wrote:

> So Lucian,
>
> Leandro, asked to discontinue the old thread due to length, so I am
> creating a new thread with  new title .
>
>
>
>              Jacob
>
> On Fri, May 26, 2017 at 3:19 PM, Lucian Smith <luc...@gm...>
> wrote:
>
>> One note:
>>
>> On Thu, May 25, 2017 at 1:03 PM, Leandro Watanabe <lea...@gm...>
>> wrote:
>>
>>> If you leave priority out, then it is equal probability (50 50 in this
>>> case) of firing each.
>>>
>>
>> This is not true: in the absence of priorities, simulators may use any
>> method they wish to determine which event fires first. Some use 'the order
>> the event appears in the document', so would always fire event E1 before
>> event E2.  In order to ensure a 50:50 probability, the 'priority' attribute
>> must exist, and be the same for both events.
>>
>> This means that your example, where both priorities are draws from the
>> same distribution, is functionally equivalent to giving both priorities the
>> same value, which is probably simplest.
>>
>> If you want one event to preferentially fire, you can give them different
>> distributions.  As an example:
>>
>> E1 priority: uniform(0,1)
>> E2 priority: uniform(0,2)
>>
>> will preferentially execute event E2 75% of the time, as a draw from
>> uniform(0,2) will be greater than a draw from uniform(0,1) 75% of the time.
>>
>> -Lucian
>>
>
>