Cycling 74 » Topic: How to filter out numbers from a list given by another list? http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/feed Tue, 18 Jun 2013 23:49:55 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-55806 <![CDATA[How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-55806 Fri, 25 Mar 2011 10:57:16 +0000 Kaspar Hi,

I have used [Lfilt], but I have a problem with this object – see below code.

Do any of you have an idea how I can filter out numbers from a list given by another list?
- without using Lfilt?

– Pasted Max Patch, click to expand. –

]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200644 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200644 Fri, 25 Mar 2011 11:00:44 +0000 Patrick Delges zl filter maybe?

p

]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200645 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200645 Fri, 25 Mar 2011 11:07:26 +0000 Laveine I don’t know Lfilt…

but “zl” do the job :

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200646 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200646 Fri, 25 Mar 2011 11:37:47 +0000 Kaspar Thanks for the advice … the problem with both zl filter and Lfilt is that if I want to filter all items from the incoming list away, none of the objects output a blank list – they simply don’t output anything … not even a bang.

– Pasted Max Patch, click to expand. –

]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200647 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200647 Fri, 25 Mar 2011 11:48:48 +0000 Patrick Delges This is a common problem in Max, there isn’t an empty list.
Here is a way (but there are others):

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200648 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200648 Fri, 25 Mar 2011 12:23:39 +0000 Kaspar Thanks, I went on with your patch, but then I encountered another problem:

if $i1== ‘() then bang is not a valid max object …

- perhaps it is just something about the syntax …

My question is: how do I see the difference if the entire list is filtered out, versus only a few of the values of the original list?

]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200649 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200649 Fri, 25 Mar 2011 12:28:28 +0000 Patrick Delges Sorry, ‘() is probably not the best symbol to use in your case. But LISP programmers will understand why I used this.

Anyway, why not using another symbol, like emptyList?

Your == test want integers, not symbols. You could use sel emptyList instead.

]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200650 <![CDATA[Re: How to filter out numbers from a list given by another list?]]> http://cycling74.com/forums/topic/how-to-filter-out-numbers-from-a-list-given-by-another-list/#post-200650 Fri, 25 Mar 2011 12:50:32 +0000 Kaspar Perfect! Thanks that works :-)

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