Re: [PD] Nestable Dictionaries in Pd

[João Pais]

you still have my data structures tutorials? that might be easier than 
the documentation.

I’ll give tutorial 4 a go, with the hints of everyone to see how far I can go.

On 7 Sep 2021, at 20:34, Miller Puckette <m...@ucsd.edu> wrote:

The least-horrible way to learn about it is the "4.data.structures" tutorial
sequence.

But the whole idea of hierarchical data structures maps horribly to a
patch language - there needs to be a better way to access 'data' in Pd.

cheers
M

On Tue, Sep 07, 2021 at 08:23:58PM +0100, Pierre Alexandre Tremblay wrote:
There are plenty of examples indeed :)

I’ll give struct with text and arrays a fair fight, I find the doc especially 
quite hard to follow for non-graphical usage but it might just be me.



On 7 Sep 2021, at 19:23, João Pais <jmmmp...@gmail.com> wrote:

Does the max documentation of flucoma has concrete examples of what you're 
looking for?

There is the purest_json library (which isn't vanilla), but maybe with some 
hacking it might be possible to read files. Not sure about writing, but my 
hacking isn't up to date with the current pd state.


Thanks for the quick reply!

2 use-cases.

1- we can generate or retrieve a dataset's content to use natively in the 
creative coding environment (Max Pd Sc) so that it integrates in other 
workflows of data mangling and drawing. We already have in our dataset object 
file support and single point entry and query but this allow batch dump and 
load. The structure is:

{
        "cols" : 3,
        "data" :      {
                "entry-0" : [ -0.06755, 0.44185, -0.33835 ],
                "entry-1" : [ -0.12305, -0.24085, 0.31295 ],
                "entry-2" : [ -0.0595, -0.2881, 0.0597 ]
        }

}


2- we can retrieve or set the state of a complex objects. Our object will spit 
out its internal status ( for instance, a neural net) and we can use the values 
of its parameters, like below. More interestingly, we can also query its 
structure and use that information too.

{
        "layers" : [          {
                        "activation" : 3,
                        "biases" : [ -3.076234734727154, 0.772760846709679 ],
                        "cols" : 2,
                        "rows" : 1,
                        "weights" : [ [ 6.015551733036155, -1.826803841455323 ] 
]
                }
,               {
                        "activation" : 3,
                        "biases" : [ -0.490600074475542 ],
                        "cols" : 1,
                        "rows" : 2,
                        "weights" : [ [ -3.115116035462417 ], [ 
-3.969281643687132 ] ]
                }
]
}

The key-value nesting is quite powerful for this type of open structure...

On 7 Sep 2021, at 15:51, Christof Ressi <i...@christofressi.com> wrote:

Can you give an example of how the data is structured?

In which ways are users supposed to interact with the data?

Christof

On 07.09.2021 16:37, Pierre Alexandre Tremblay wrote:
Dear all

I am trying to find the most Pd-vanilla-way to interface with our Dataset 
object in the FluCoMa project. In Max and SuperCollider we use Dictionaries, 
which are nestable and queryable in powerful programmatic ways, working 
essentially like interfaces to JSON-like data structures.

I’ve looked at [struct] but the [set] object does not allow to do symbols and 
(list of) floats, and [appends] seem to have the same limitations. In all 
cases, I’m not certain it is the best approach in any cases to create such a 
list in Pd...

I wonder how people do it and if I am missing an obvious workflow, especially 
with nested structures.

Any pointer (pun intended) welcome

p







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