with simple things like this i cant help but think things are much easier to program in c rather than thinking in terms of signal processing...

is there an easy way of getting the average? bearnig in mind i might want to change the array size later so i want to avoid a big chain of additions followed by a division.

i dunno. computers are pretty good at maths. unless you want to get values for individual samples in an audio array, it shouldn't be too hard for your cpu to add and then divide a chain 9of numbers.

even if you make an external, how else can you get an average other than by adding all the values and dividing by the number of values?

there is also an object called [average] , but i couldn't find anything to do exactly what you want.

maybe someone knows??

try this

http://www.pdpatchrepo.info/hurleur/average.pd

the trouble with adding and then dividing was that i couldnt think of a way of doing it so that th number of points in the array could change without having to alter the sub patch or abstraction or whatever.

that patch looks great, thanks very much. there's a few objects there that i didnt know about which are quite fundamental like until (i'm still fairly new to pd). thanks again.

this version of the patch fixes that problem. it uses [arraysize] to figure out what to divide by. i also added the necessary trigger and float so the intermediate sums are not output. arraysize is an extern, so makesure you have arraysize.dll in the appropriate path.

zdh

http://www.pdpatchrepo.info/hurleur/average2.pd

wow, that works great. cheers.

i'm glad that works for you.

a couple changes to make it better (let me know if you help with this):

turn it into an abstraction with an inlets and an outlet.

use some dollarsigns so you can use the abstractions like [arrayaverage <arrayname>]

and, also, test it to make sure it's not making any 'off by one errors' with the counting/indexing. i just tested it on simple constant value arrays, so you might want to verify the number is giving you at the end.

happy patching.

zdh

ooh, i was wondering how to use initialisation arguments in abstractions - i just read the bit in the manual on dallar signs and see now that thats the way to do it.

yeah, i shouldnt have any trouble making those changes, thanks.