[PD] Expr V0.5-alpha

Alexandre Torres Porres porres at gmail.com
Mon Feb 15 01:03:37 CET 2016

Ok, I don't think I was able to get the new version working, anybody else

This might be too late in the game, I know, but if you're including
features, I have some requests.

In [fexpr~], I find it would be good to set a starting value for the
current sample input, you could set this via a set message and that would
overwrite the signal input for that sample.

You can now set just about any previous samples, but no current.

I see you'd need to create a new syntax for this, something like "set in1
0.4" (to set x1[0] to 0.4)

I really need this for some applications where I'm using fexpr~ as signal


A wrap function like [pong]

2016-02-05 23:36 GMT-02:00 Shahrokh Yadegari <sdy at ucsd.edu>:

> Dear All,
> Attached is a pre-release of Expr 0.5 compiled for Mac os x (compiled on
> 10.9) and Linux (compiled on an older Cent OS). I have also attached
> Alexandre's big pd patch which listed the issues, with my comments.
> Hopefully I have addressed most of the issues that were brought up and now
> I am working on a more complete documentation of Expr objects. One open
> issue is that expr still supports no more than 10 expressions.
> I have provided a mechanism for local variables and abstraction
> substitutions ($0 and $1, $2, etc.) to work. Also, one hopefully useful new
> feature in V0.5 is the assign  '='  operator. Now you can use expr to
> assign to "value"s and into arrays. So if you have a variable called 'count'
> "value count"
> "expr count = count + 1"
> will implement a counter, raising the value of count with every "bang"
> You can also change values of arrays through the usual syntax.
> "expr array1[5] = $f1"
> will set the sixth value (counting zero based) of the array "array1" to
> the incoming float value on inlet 1.
> I will write a more informative and comprehensive release notes along with
> the documentation when I pass the sources to Miller. However, I have made a
> few changes to the parser and I am looking for alpha-testers who can run
> the code and let me know if any bugs are found, specially in parsing of
> complex expressions.
> I look forward to hearing from whoever uses these objects. Please let me
> know if you find any bugs. (NOTE: you need to create the links for expr and
> fexpr~ to get the new version for those as well.)
> cheers,
> Shahrokh
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