Hi,

I need to detect and store time between user input (and probably the input value as well). I would like to be able to store say the last 10 events.

I figure I should use an array that I can then shift the values in, pushing the oldest ones out when new ones come in.

Could someone please show me a good and simple way on how to start experimenting with this?

The purpose is to detect simple patterns in user input and use it as a trigger for things.

Thanks!

@cfry As far as I know there is no easy way to shift the whole array so it might be easier to just build a list:

list_building.pd

@cfry why do you need to shift the array? just use it as a circular buffer, have a cyclical counter (using [mod] or [% ]) to keep track of the current position (last input) and for each input increment the modulo counter and store the input there

@cfry I made this queue abstraction that can possibly do what you want to achieve: https://forum.pdpatchrepo.info/topic/12170/queue-a-universal-first-in-first-out-fifo-queue-that-takes-symbols-floats-and-lists-vanilla

Hey, thanks for the input! Still have not got hold of my computer to test all of this out. Hopefully in a few days.

Slightly off topic: what would be a good (online) text recourse for understanding lists and arrays in puredata, apart from the Floss manual?

@cfry I'm not aware of any other that explains it as well as the FLOSS manual. Once you have the basics from that, I suggest you look at the help files for [list] and [array] to get to know all the new objects and what they do. The List-abs library also has lots of helpful abstractions to do operations on lists.

Sorry, you probably know all this already. Is there something in particular you don't understand that the manual doesn't cover?

@weightless I ask mainly because I would prefer to be able to read from my android phone while on the move, and because the "math" entry in the Floss manual return an error message only. But I am sure the best way to learn is to use the help files in pd, if you have access to it.

@cfry The math section of the FLOSS manual was broken for some time, this seems to work: https://en.flossmanuals.net/pure-data/_full/#math_1. Note that this information is very old and newer objects are not covert. Here are the help files the only good source i know.

Hey! Back online. Now I have looked at @weightless list_building.pd, the @ingox fifo patch and also tried to build an array version myself as per the suggestion of @seb-harmonik.ar (but it got quite "bloaty"). Thanks!

I suspect that the list_building.pd patch could be the best way to go since I really only need to store a few values (six entries in total). I do not need any graphical representation so using (Pd) arrays may be a waste of resources. It is also very good to make it simple and from scratch so I have total understanding on what is happening inside.

I edited the list_building.pd patch as such:

syzygy_list_test.pd

How do I access the entries in the list individually, "index style"?

I am really thankful for your help and patience with noob questions!

@cfry list-seek.zip
Although in vanilla you could use [list store]

David.

@whale-av Thanks a lot David, that sent me in the right direction. I used [unpack f f f] then it eventually worked.

This is going live, as a part of a bigger patch, in a few days.

Best regards,