Re: [PD] Pd-0.40.3-extended-rc2 released - Console Window
When the console is resized the upper part gets bigger, too. That's wasting a lot of space. I'm on Windows. Havn't tested with Linux so far. Ingo ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] worldwide weather forecast into PD
B. Bogart(e)k dio: Hey there, Are you using the data for a performance or installation? I used live weather data (from an APRS packet radio gateway) parsed from a website. It was the worst mistake I made. The installation ran for a couple years but had four problems: 1. The format of the webpage changed, I rewrote it. 2. The power went down. 3. The power went down again. 4. The website went down. Now I know not to depend on any external infrastructure. no it is just a set of patches that should be used in different situations by other people. they should be aware of this potential risks of live internet access. thanks for the suggestions anyway. enrike Using your own weather station would be very stable (they are not as expensive as they sound). Or perhaps there is some more stable way to get at the APRS data than a website. APRS is nice because there are hundreds of weather stations all over the world, are interlinked by packet radio network. The problem in my case was the internet gateway. .b. altern wrote: hi anyone knows of an online worldwide forecast service? I am developing some python scripts with Pyext external that retrieve different type of data from the net into PD. At the moment i have been using yahoo weather, this is quite handy because they have RSS feed that can be easily manipulated from python and returned into PD. Currently i have scripts that tell me the external IP of my computer and another one that uses the IP to retrieve geolocation data (lat, long, nearby city, country ), using this i think i should be able to ask yahoo for weather data of an specific city and country and from there access the RSS. However I think there are some copyright issues with yahoo weather. I read a notice in the HTML source of yahoo weather saying that this data is not to be used without permission ...You are prohibited from using or repurposing this data in any way without express written consent from Yahoo! ... I guess i could pretend i did not see the notice but maybe there is some worldwide forecast service that would allow me to use the data? thanks enrike ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] better tabread4~
On 25/06/2008, at 22.33, cyrille henry wrote: so finally, what should be the name of this object? is it ok if i remove the other test i made and to use only this one? I think you a free to name your code what you want. And also to delete it. I however think people would find it interesting with a lib* of tabread's with different interpolation schemes. At least i think it would be cool with a collection where also the interpolation methods of the others are included (fx, the SC one). Thanks for publishing. (* where ever its one-file-multi-class, one-class-per-file or multi- method-per-class.) ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] worldwide weather forecast into PD
hi hans thanks for the link, i checked it briefly yesterday, not sure if i will be able to find the part of code i need, it seems a bit too bit and it is C, probably easier to do it myself in python. The weather.com city codes look like the same as weather.yahoo.com it seems to me that they both access the same system to get the data. thats interesting, i found already several weather forecast systems that are actually the same in the background. enrike Hans-Christoph Steiner(e)k dio: This program for Mac OS X gets the data from weather.com, I think: http://heat-meteo.sourceforge.net/ It's open source, so you could get the parsing code. .hc On Jun 25, 2008, at 10:59 AM, altern wrote: hi anyone knows of an online worldwide forecast service? I am developing some python scripts with Pyext external that retrieve different type of data from the net into PD. At the moment i have been using yahoo weather, this is quite handy because they have RSS feed that can be easily manipulated from python and returned into PD. Currently i have scripts that tell me the external IP of my computer and another one that uses the IP to retrieve geolocation data (lat, long, nearby city, country ), using this i think i should be able to ask yahoo for weather data of an specific city and country and from there access the RSS. However I think there are some copyright issues with yahoo weather. I read a notice in the HTML source of yahoo weather saying that this data is not to be used without permission ...You are prohibited from using or repurposing this data in any way without express written consent from Yahoo! ... I guess i could pretend i did not see the notice but maybe there is some worldwide forecast service that would allow me to use the data? thanks enrike ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list Mistrust authority - promote decentralization. - the hacker ethic ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] pd extended and X11
Hi hans list, I've seen that the installation of the X11 user package is necessary to run GEM under osx with the last 0.40-3 RC2 pd extended. I was wondering if it's possible to explicite that on the installers pages (http://at.or.at/hans/pd/installers.html and in the near future : http://puredata.info/downloads). As pd-extended is very useful for beginners, I think it can be difficult for some of them to understand the printed error in the pd console. Maybe a line as: To run GEM and other graphical applications, you need to install X11 first. would be a clear and simple indication. A link as this one http://www.simplehelp.net/2006/10/22/how-to-install-x11-in-os-x/ could also be helpy. Greetings, Nicolas ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] text disappears in Object ?
i ! Anybody knows why or have any idea: when i use [plugin~], all my text in my patch (in object and message ) disappears ... ?! in Pd version 0.40.3-extended-20080625 Thanks in advance for your council ! tranquillou, ths _ Envoyez avec Yahoo! Mail. Une boite mail plus intelligente http://mail.yahoo.fr___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] pd extended and X11
Good idea, I updated the included Readme and the FAQ entry: http://puredata.info/docs/faq/macosx .hc On Jun 26, 2008, at 12:14 PM, Nicolas Montgermont wrote: Hi hans list, I've seen that the installation of the X11 user package is necessary to run GEM under osx with the last 0.40-3 RC2 pd extended. I was wondering if it's possible to explicite that on the installers pages (http://at.or.at/hans/pd/installers.html and in the near future : http://puredata.info/downloads). As pd-extended is very useful for beginners, I think it can be difficult for some of them to understand the printed error in the pd console. Maybe a line as: To run GEM and other graphical applications, you need to install X11 first. would be a clear and simple indication. A link as this one http://www.simplehelp.net/2006/10/22/how-to-install-x11-in-os-x/ could also be helpy. Greetings, Nicolas ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/ listinfo/pd-list Computer science is no more related to the computer than astronomy is related to the telescope. -Edsger Dykstra ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Pd-0.40.3-extended-rc2 released - Console Window
Yeah, that thing needs to be re-written from scratch, it's a big hack. For the next release... .hc On Jun 26, 2008, at 8:41 AM, Ingo Scherzinger wrote: When the console is resized the upper part gets bigger, too. That’s wasting a lot of space. I’m on Windows. Havn’t tested with Linux so far. Ingo I spent 33 years and four months in active military service and during that period I spent most of my time as a high class muscle man for Big Business, for Wall Street and the bankers. - General Smedley Butler ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] pd extended and X11
Is this correct, that GEM now needs X11? Or is it still just PDP? If so, then I'll need to update the FLOSS Manual when 0.40 becomes the current stable Extended release. Is there any reason for this, by the way? I always recommend GEM over PDP because a) it's better documented and b) it doesn't require extra software to be installed... best, D. Hans-Christoph Steiner wrote: Good idea, I updated the included Readme and the FAQ entry: http://puredata.info/docs/faq/macosx .hc On Jun 26, 2008, at 12:14 PM, Nicolas Montgermont wrote: Hi hans list, I've seen that the installation of the X11 user package is necessary to run GEM under osx with the last 0.40-3 RC2 pd extended. I was wondering if it's possible to explicite that on the installers pages (http://at.or.at/hans/pd/installers.html and in the near future : http://puredata.info/downloads). As pd-extended is very useful for beginners, I think it can be difficult for some of them to understand the printed error in the pd console. Maybe a line as: To run GEM and other graphical applications, you need to install X11 first. would be a clear and simple indication. A link as this one http://www.simplehelp.net/2006/10/22/how-to-install-x11-in-os-x/ could also be helpy. Greetings, Nicolas ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/ listinfo/pd-list Computer science is no more related to the computer than astronomy is related to the telescope. -Edsger Dykstra ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista ---Oblique Strategy # 127: Openly resist change ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] pd extended and X11
I think it is not correct, but I could be wrong. X11 does come installed with 10.5/Leopard now. .hc On Thu, 26 Jun 2008, Derek Holzer wrote: Is this correct, that GEM now needs X11? Or is it still just PDP? If so, then I'll need to update the FLOSS Manual when 0.40 becomes the current stable Extended release. Is there any reason for this, by the way? I always recommend GEM over PDP because a) it's better documented and b) it doesn't require extra software to be installed... best, D. Hans-Christoph Steiner wrote: Good idea, I updated the included Readme and the FAQ entry: http://puredata.info/docs/faq/macosx .hc On Jun 26, 2008, at 12:14 PM, Nicolas Montgermont wrote: Hi hans list, I've seen that the installation of the X11 user package is necessary to run GEM under osx with the last 0.40-3 RC2 pd extended. I was wondering if it's possible to explicite that on the installers pages (http://at.or.at/hans/pd/installers.html and in the near future : http://puredata.info/downloads). As pd-extended is very useful for beginners, I think it can be difficult for some of them to understand the printed error in the pd console. Maybe a line as: To run GEM and other graphical applications, you need to install X11 first. would be a clear and simple indication. A link as this one http://www.simplehelp.net/2006/10/22/how-to-install-x11-in-os-x/ could also be helpy. Greetings, Nicolas ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/ listinfo/pd-list Computer science is no more related to the computer than astronomy is related to the telescope. -Edsger Dykstra ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista ---Oblique Strategy # 127: Openly resist change zen \ \ \[D[D[D[D ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] text disappears in Object ?
Which platform? I think [plugin~] only really works on GNU/Linux. .hc On Thu, 26 Jun 2008, ths otra wrote: i ! Anybody knows why or have any idea: when i use [plugin~], all my text in my patch (in object and message ) disappears ... ?! in Pd version 0.40.3-extended-20080625 Thanks in advance for your council ! tranquillou, ths _ Envoyez avec Yahoo! Mail. Une boite mail plus intelligente http://mail.yahoo.fr zen \ \ \[D[D[D[D ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] pd extended and X11
On Thu, Jun 26, 2008 at 6:48 AM, Derek Holzer [EMAIL PROTECTED] wrote: Is this correct, that GEM now needs X11? It is not correct. GEM uses Carbon APIs for all drawing. cgc ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] better tabread4~
On Thu, 26 Jun 2008, Damian Stewart wrote: one of the pushes to me finally learning Pd was discovering that there was an object called [moses], and it did what it said it did. We need a state-saving object class named [jesus]. _ _ __ ___ _ _ _ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal, Québec___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] better tabread4~
On Tue, 24 Jun 2008, Charles Henry wrote: On Tue, Jun 24, 2008 at 9:24 PM, Mathieu Bouchard [EMAIL PROTECTED] wrote: I don't think that more than one alternative will be necessary. For 4-point table lookups that go through all the original points, I don't know why anyone would aim lower than a C2 piecewise-polynomial. Unfortunately, it would be somewhat too late to just call it [tabread4~]. Or not. How low is too low? hmmm I fucked up here. To get a C2 curve you may need to solve an equation system covering the whole table (!). Anyhow, a C1 system is fine enough for most uses, and it would be already much better than pd's. The thing is that you can only match the 2nd derivatives if you let the 1st derivatives just match but freely float. Then there will be one curve going through all points of the whole table supposing that the 2nd derivative is zero at the beginning and end of the table. Clearly this is a wholly different game because you need to compute a 2nd table to remember what the 1st derivatives are supposed to be and then you can't change anything in the 1st table without recomputing the 2nd table from scratch, or something. When we have an interval between samples, we wish to fit a polynomial (because it's fast, I guess) that satisfies our constraints. We could specify the polynomial has the same values at x[-1],x[0], x[1], x[2] (tabread4~). No, you don't set those 4 constraints because else you will get exactly the same polynomial that tabread4~ already figures out, and we know that it is not C1. You need to drop x[-1] and x[2] as conditions. or we could set x[0],x[1] and x'[0]=(x[1]-x[-1])/2 and x'[1]=(x[2]-x[0])/2 again, 4 constraints, cubic polynomial, etc... Seems reasonable. What I want has to have constraints on x'[0] and x'[1]. Those would be a possibility. The problem is that it uses a gap of 2 samples instead of one, so it uses a blurry derivative, but the alternative is to have to pick between forward-difference and backwards-difference. The blurry derivative happens to be the average of the 1-sample forward-difference and backward-difference. and x''[0]=x[1]-2*x[0]+x[-1] and x''[1]=x[2]-2*x[1]+x[0] 6 constraints, 5th degree polynomial I think that the replacement for tabread4~ should be another cubic, so that it takes almost the same time to compute it. What I said about C2 was based on a mistaken reading of webpages trying to refresh myself on splines. I should've been more careful. and if you additionally wanted it to actually go through x[-1] and x[2], it would be 7th degree No, you shouldn't care about matching those extra points because anyway only the curve between x[0] and x[1] is used. The two outer points should be used only to figure out what derivatives to use. But not all possibilities are worth analyzing... I'm not even sure what kind of method to use to narrow the field. The blurry derivative above seems to be fine... I'd have to try it, but I should be working on other things now. I suppose that Cyrille already has everything figured out anyway. I just feel like talking about math sometimes... ;) _ _ __ ___ _ _ _ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal, Québec___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] object name and anti aliasing technique : WAS : Re: better tabread4~
Steffen Juul a écrit : On 25/06/2008, at 22.33, cyrille henry wrote: so finally, what should be the name of this object? is it ok if i remove the other test i made and to use only this one? I think you a free to name your code what you want. yes, but i prefere a name that everybody is happy with. And also to delete it. well, deleting file is usually a bad idea, but the current implementation are only test. i dont think anyone is using them yet. So i think there is no problem if i replace tabread4*~ with only the best of them. I however think people would find it interesting with a lib* of tabread's with different interpolation schemes. yes, i think we all agree that having a lib offering the choice is great, but how much do we need. i don't see interest having 2 or 3 different object offering a 4 points interpolations. then, it's possibile to have interpolation using more points, and also interpolation that offer antialiasing. BTW : i just commited a tabosc4aa~ (aa is for anti aliasing). this is also just a test. it's far from perfect, but lot's better than the original tabread4~ when dealing with high pitch transposition. for now, i did this with a classic 8x upsampling + biquad filter inside the tabread4aa~ (ok, this is more cpu intensive : about 1 to 1.5 % cpu) before i'm doing more work on this, did anyone have experience with this? how do other software deal with this? (some use a Shanon interpolation, but this is hard to code in an efficient way + i don't have very good result in the test i made) At least i think it would be cool with a collection where also the interpolation methods of the others are included (fx, the SC one). i think we could have the standard tabread~ / tabread4~, a good (like the curent tabread4c~), and a very good (better than the curent tabread4aa~). and maybe an extra for non realtime synthesis. this should be made for tabread / tabosc / vd, and maybe some other i forget. having only one object that offer many interpolation schematic is great, but need more work. for now, i think it's simpler to use one interpolation schematic per object. (just like miller did with tabread~ and tabread4~). so, i'm looking for a _prefix_ to use like this : tabread_prefix_~ tabosc_prefix_~ vd_prefix_~ one _prefix_ or the 4 points interpolation as describe by charles henry and an other one for the best anti alliased interpolation i can possibly make. cheers cyrille Thanks for publishing. (* where ever its one-file-multi-class, one-class-per-file or multi-method-per-class.) ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Spotlight Importer for OS X
On Fri, Jun 20, 2008 at 12:11 PM, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: On Jun 20, 2008, at 2:34 PM, Luke Iannini wrote: On Fri, Jun 20, 2008 at 5:15 AM, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: On Jun 20, 2008, at 1:55 PM, Luke Iannini wrote: On Fri, Jun 20, 2008 at 4:02 AM, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: Does this work at all on 10.4/Tiger? Yes, it's configured by default to work with both 10.4 and 10.5. Any idea whether it would cause problems on 10.3? That's not a make- or-break thing, but it would be nice if it could still work on 10.3. As for including the Info.plist changes in v0-40, it would need to be throughly tested before including it. Currently, there are only a couple outstanding bugs that need to be fixed for this release (AFAIK), so I am really hesitant to include something totally new. According to this http://developer.apple.com/qa/qa2005/qa1406.html the public.plain-text UTI we're using existed in 10.3. Also, this seems to be a transitional document for 10.310.4, and doesn't include any callouts except: Note: UTIs are available in Mac OS X v10.3 Panther and later. Mac OS X v10.4 Tiger added many new types and integrated support throughout the operating system. So I think it won't be a problem for the keys in the plist, and in the future, 10.3 should just ignore the Library/Spotlight/PureData.mdimporter file just as it would ignore any other file it didn't recognize in the bundle. Ok, sounds like it is worth trying to add the Info.plist UTI stuff to this release. Feel free to add it now to branches/pd-extended/v0-40, but please test it. .hc Yo, sorry I didn't read that closely and thought you were comfortable with adding the whole kit n' kaboodle, sorry about that. As for building it, how do you build it yourself? That's usually a good starting point for adding it to the auto-build. If it is an xcode project, you can use the command line tool xcodebuild. Yo, I just built in with the build button : ). I like buttons... So yea, I have the project. Looks like it builds aok with xcodebuild, thanks for the tip. Where should I put the project folder? Good question. The first place I thought of is packages/darwin_app since it is only for things related to the Pd.app for Mac OS X. Maybe: packages/darwin_app/spotlight_importer Then it probalby makes sense to make a separate 'spotlight_importer:' target in packages/darwin_app/Makefile to build and install it. .hc Will do. Cheers Luke All information should be free. - the hacker ethic ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] more eee trouble (on xandros)
hi im trying to install extended using hans' deb package and xandros (i know ubuntu and debian are better but i do wanna keep this) when i launch pd from the terminal i get: /usr/lib/pd/bin/pd-gui: error while loading shared libraries: libtk8.4.so.0: cannot open shared object file: no such file or directory am i missing a library? how to fix it? thanks ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] object name and anti aliasing technique : WAS : Re: better tabread4~
On Thu, Jun 26, 2008 at 12:36 PM, cyrille henry [EMAIL PROTECTED] wrote: then, it's possibile to have interpolation using more points, and also interpolation that offer antialiasing. BTW : i just commited a tabosc4aa~ (aa is for anti aliasing). this is also just a test. it's far from perfect, but lot's better than the original tabread4~ when dealing with high pitch transposition. for now, i did this with a classic 8x upsampling + biquad filter inside the tabread4aa~ (ok, this is more cpu intensive : about 1 to 1.5 % cpu) before i'm doing more work on this, did anyone have experience with this? To me, the upsampling is not a good approach for anti-aliasing. This means, you have to interpolate, then filter, then sample again. But you will wind up applying your filter at a lot of points, which will just be discarded. In fewer steps, (I think) we can modify the interpolation function continuously as the speed changes. Rather than filtering on a long signal, just filter it in place. The part that gets tricky is that the DFT is a lot less relevant, and you have to rely upon continuous functions instead. I didn't make any progress today... and friday is gone for sure :) I will calculate the spectrum for tabread4c~ on Saturday, I think. I'm down with the project, but I can't really see the big picture for a tabread/vd/tabosc lib yet. Chuck ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] better tabread4~
On Thu, Jun 26, 2008 at 11:18 AM, Mathieu Bouchard [EMAIL PROTECTED] wrote: I fucked up here. To get a C2 curve you may need to solve an equation system covering the whole table (!). Anyhow, a C1 system is fine enough for most uses, and it would be already much better than pd's. The thing is that you can only match the 2nd derivatives if you let the 1st derivatives just match but freely float. Then there will be one curve going through all points of the whole table supposing that the 2nd derivative is zero at the beginning and end of the table. Clearly this is a wholly different game because you need to compute a 2nd table to remember what the 1st derivatives are supposed to be and then you can't change anything in the 1st table without recomputing the 2nd table from scratch, or something. I get what you're saying now. I had to read it a couple times through to see :) You're referring to piecewise cubic polynomials, right? We would wind up with an overdetermined system of equations if we didn't float the 1st *and* 2nd derivatives, which would come out as a linear algebra problem of the size of the table. but I think it gets even worse. There could be a non-zero null space to the problem. There are infinite solutions to interpolate a table full of zeros, with these conditions. What a mess :) or we could set x[0],x[1] and x'[0]=(x[1]-x[-1])/2 and x'[1]=(x[2]-x[0])/2 again, 4 constraints, cubic polynomial, etc... Seems reasonable. What I want has to have constraints on x'[0] and x'[1]. Those would be a possibility. The problem is that it uses a gap of 2 samples instead of one, so it uses a blurry derivative, but the alternative is to have to pick between forward-difference and backwards-difference. The blurry derivative happens to be the average of the 1-sample forward-difference and backward-difference. By expanding it out to more points, we could use a more accurate calculation of the derivative. There's always a frequency dependent effect on the accuracy of 1st derivative approximations. For example, backwards difference: x' ~= x[n] - x[n-1] X'[z] = X[z] ( 1 - z^-1) Which has spectrum, X'[w]=1-e^(-j*w) |X'[w]|^2=(1-cos(w))^2+sin(w)^2, phase (X'[w])=arctan( sin(w)/(1-cos(w)) ) our ideal system has X'[w]=j*w Central divided difference x' ~= (x[n+1] - x[n-1])/2 X'[z] = X[z] ( z - z^-1)/2 Which has spectrum, X'[w]=(e^(j*w)-e^(-j*w))/2 X'[w]=j*sin(w) It still has trouble with the high frequencies. So there might be some value in expanding the number of points to include better approximations. and x''[0]=x[1]-2*x[0]+x[-1] and x''[1]=x[2]-2*x[1]+x[0] 6 constraints, 5th degree polynomial I think that the replacement for tabread4~ should be another cubic, so that it takes almost the same time to compute it. What I said about C2 was based on a mistaken reading of webpages trying to refresh myself on splines. I should've been more careful. Yeah, a cubic polynomial makes the most sense for small changes. I haven't ever heard of people interpolating 4 points with a 5th degree polynomial but I think I could make it work The blurry derivative above seems to be fine... I'd have to try it, but I should be working on other things now. I suppose that Cyrille already has everything figured out anyway. I just feel like talking about math sometimes... ;) It's all good by me :) Chuck ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
