# Re: [sympy] Proposal draft - Probabilities project

```If you are implementing a graph thing that cannot be done by networkx
due to it's symbolic nature, then you should go into more detail about
what this will look like and what the implementation will be. Note
that if you simply mean edge or node labels, networkx lets you use any
Python object as a label, including SymPy expressions.```
```
Also you should make it clear how the graph algorithms will enable
computations in statistics, not just the other way around. I don't
think we should have a graph of a markov chain just for the sake of
having it, but if if some statistical computation requires
constructing and computing something on a graph then it can make
sense.

Aaron Meurer

On Wed, Mar 25, 2020 at 6:16 PM Basilis Kalos <kalosbasile...@gmail.com> wrote:
>
> Hi! Thank you very much for your comments!
>
>   Yes, i believe that the algorithms that i was going to implement from
> Graph’s theory are going to be very useful to the Stochastic processes. The
> NetworkX package does not support symbolic expressions and so implementation
> of some functions from Graph theory, mainly directed graphs, would be really
> useful (for example, in the case that the transient matrix of a Markov chain
> has symbolic expressions).
>
>   Moreover, the module I was suggesting will only have the functions that are
> going to be used by ‘’stats’’. If it’s still ok, I will give special care to
> make that really clear in my proposal. Any more suggestions will be really
> appreciated.
>
>
> Thank you!
>
>
>
> Τη Τετάρτη, 25 Μαρτίου 2020 - 10:53:35 μ.μ. UTC+2, ο χρήστης Aaron Meurer
> έγραψε:
>>
>> Is the graph theory part needed to implement the stats ideas. In
>> general, graph theory is out of scope for SymPy (see
>> https://github.com/sympy/sympy/wiki/GSoC-2020-Ideas#non-ideas). If
>> some graph theory algorithms are required to do symbolics, that is
>> fine, but you should make that clear in the proposal.
>>
>> Aaron Meurer
>>
>> On Wed, Mar 25, 2020 at 2:46 PM Basilis Kalos <kalosba...@gmail.com> wrote:
>> >
>> > Hello all!
>> >
>> >   I'm sending you the first draft of my application. Any comments and
>> > sugestions will be greatly appreciated.
>> >
>> > Thank you!
>> >
>> >
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