gmane.comp.mathematics.maxima.general

Re: Python vs Lisp: was RE: how to pass the name of avariable as argument?

ahmet alper parker — 2008-05-18T12:07:43

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How to solve an inequality?

Radek — 2008-05-17T18:08:42

How can I solve an inequality in Maxima?

Re: Maxima + ECL status

Robert Dodier — 2008-05-17T18:23:37

Super -- any time you can invest is greatly appreciated. Well, there's not much to say. The ECL-specific stuff is on the branch patches-for-ecl-branch in Maxima CVS. I think this incantation or something like it should fetch the branch: cvs -d :pserver:anonymous< at >maxima.cvs.sourceforge.net:/cvsroot/maxima get -rpatches-for-ecl-branch maxima You'll need to build ECL from current CVS (the 0.9j release won't work). The --enable-smallcons flag for configure is recommended (by the ECL maintainer) and --enable-unicode is discouraged. Following the instructions in INSTALL.lisp (in the top-level maxima directory) up to and including step 4. Then cd src, launch ECL, and try to build Maxima via defsystem (further steps in INSTALL.lisp) or asdf. Sorry if this is too vague; I haven't yet figured out what works. The resulting Maxima program (launched by (cl-user::run)) can do a lot of stuff, but it has nontrivial strangeness. It gets part way through the Maxima test suite (run_testsuite()) before halting with an e

Re: Problems with the function $specint

Robert Dodier — 2008-05-17T17:59:35

No problem, Dieter. Thanks a lot for looking at specint, I appreciate your help very much. I look forward to seeing the patches when you can post them. Thanks again for your help, Robert Dodier

Re: stringout() problem with Maxima 5.15.0

andre maute — 2008-05-17T17:19:20

Thanks for the quick fix Andre

Re: stringout() problem with Maxima 5.15.0

Robert Dodier — 2008-05-17T16:31:45

Thanks for pointing it out. I've committed a bug fix (shown below). Be that as it may, I have some other comments. (1) Instead of saving and restoring via a temporary variable, just use block like this: block([variable_to_be_saved : foo], blah, blah, blah) block restores the previous value. (2) I find it's usually shorter and clearer to use with_stdout which just collects all the output within in and directs it to a file; if you call stringout you have to name the output file every time. e.g. with_stdout("output.txt", print(this), print(that), grind(the_other)) (3) Might be simpler to open an output stream and write to it via printf. Aside from printf, some other functions recognize streams, including with_stdout and the numericalio functions. hope this helps Robert Dodier PS. Index: src/suprv1.lisp =================================================================== RCS file: /cvsroot/maxima/maxima/src/suprv1.lisp,v retrieving revision 1.68.4.1 diff -u -r1.68.4.1 suprv1.lisp --- src/suprv1.lisp 26

Re: Is it a bug?

Robert Dodier — 2008-05-17T15:25:15

Well, this is pretty mysterious ... here is a little more info. By the way can someone open a bug report? Problems like this get lost on the mailing list if not resolved right away. desolve calls laplace and ilt (inverse Laplace transform). It appears the problem originates from ilt. This function demonstrates the bug when called. But translate(foo) makes it go away --- because, I suppose, the loop is handled differently. foo () := for i : 1 thru 3 do (ilt (1/s, s, t), print (i)); translate (foo); :lisp #'$foo => # $I 3) '$DONE) (SIMPLIFY ($ILT (DIV 1 (TRD-MSYMEVAL $S '$S)) (TRD-MSYMEVAL $S '$S) (TRD-MSYMEVAL $T '$T))) ($PRINT $I)))> foo (); => 1 2 3 I am debugging with 5.14.0 + Clisp 2.39 + Linux here. I don't see the problem with a recent cvs version + Clisp, SBCL, CMUCL, or GCL (all Linux). hope this helps Robert Dodier

stringout() problem with Maxima 5.15.0

andre maute — 2008-05-17T15:19:48

I have the following maxima file ------ test.max ------------------- output_integer(z) := block( [tmp], tmp : file_output_append, file_output_append : true, stringout( "output.txt", "/* integer */" ), stringout( "output.txt", z ), file_output_append : tmp, return(z) ); output_integer(1); ------ test.max ------------------- using my NEW Maxima installation (maxima -b test.max), I have ------------------------------------------------ Maxima 5.15.0 http://maxima.sourceforge.net Using Lisp CLISP 2.45 (2008-05-15) Distributed under the GNU Public License. See the file COPYING. Dedicated to the memory of William Schelter. The function bug_report() provides bug reporting information. (%i1) batch(test.max) batching /home/seirios/test.max (%i2) output_integer(z) := block([tmp], tmp : file_output_append, file_output_append : true, stringout("output.txt", "/* integer */"), stringout("output.txt", z), file_output_append : tmp,

Re: Bug Report - tex2ooo

Robert Dodier — 2008-05-17T14:51:34

Sorry, there is some bit-rot in tex2ooo.lisp; it is a modified version of src/mactex.lisp, and the two have diverged. I have committed a bug fix to cvs but you might run into other discrepancies. With the new tex2ooo: (s+1)/(s^4+3*s^3+4*s^2-2*s-3); tex (%); => {alignc {s + 1} over {s^4 + 3 cdot s^3 + 4 cdot s^2 - 2 cdot s - 3 }} HTH Robert Dodier PS. Index: share/contrib/tex2ooo.lisp =================================================================== RCS file: /cvsroot/maxima/maxima/share/contrib/tex2ooo.lisp,v retrieving revision 1.7 diff -u -r1.7 tex2ooo.lisp --- share/contrib/tex2ooo.lisp 17 Feb 2008 01:42:49 -0000 1.7 +++ share/contrib/tex2ooo.lisp 17 May 2008 14:44:31 -0000 < at >< at > -281,8 +281,8 < at >< at > ))))) (append l r))) -(defprop mnctimes " cdot " texsym) -(defprop mtimes " cdot " texsym) ;; HMM, SEEMS INADVISABLE +(defprop mnctimes (" cdot ") texsym) +(defprop mtimes (" cdot ") texsym) ;; HMM, SEEMS INADVISABLE (defun tex-sqrt(x l r) ;; format as \\

Re: simple question

Alasdair McAndrew — 2008-05-17T14:07:14

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Re: simple question

Andrej Vodopivec — 2008-05-17T14:01:26

2008/5/17 ahmet alper parker gmail.com>: You are looking for zeromatrix: (%i1) ?! zeromatrix; -- Function: zeromatrix (, ) Returns an by matrix, all elements of which are zero. There are also some inexact matches for `zeromatrix'. Try `?? zeromatrix' to see them. (%o1) true (%i2) zeromatrix(4,4); (%o2) matrix([0,0,0,0],[0,0,0,0],[0,0,0,0],[0,0,0,0])

simple question

ahmet alper parker — 2008-05-17T13:52:39

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Re: Bug Report - tex2ooo

Richard Fateman — 2008-05-17T05:17:21

You don't need such a complex example to show that tex2ooo, whatever it is for, is quite broken. (%i5) trace(?tex); (%o5) [tex] (%i7) tex(x*y); 1 Enter ?tex [x y, false, false, mparen, mparen] 2 Enter ?tex [x, false, cdot , mparen, *] (X . " cdot ") has an atomic cdr - `display' -- an error. To debug this try debugmode(true);

Bug Report - tex2ooo

Ismael Garrido — 2008-05-17T03:53:09

Using Maxima 5.15.0, compiled on Debian Lenny AMD64 using CLISP. kill(all); (%o0) done (%i1) load (tex2ooo); (%o1) /usr/local/share/maxima/5.15.0/share/contrib/tex2ooo.lisp (%i2) 'integrate(x^2*exp(-%i), x); (%o2) %e^(-%i)*integrate(x^2,x) (%i3) tex(%); Maxima encountered a Lisp error: APPEND: A proper list must not end with " cdot " Automatically continuing. To reenable the Lisp debugger set *debugger-hook* to nil. (%i2) (s+1)/(s^4+3*s^3+4*s^2-2*s-3); (%o2) (s+1)/(s^4+3*s^3+4*s^2-2*s-3) (%i3) tex(%); Maxima encountered a Lisp error: APPEND: A proper list must not end with " cdot " Automatically continuing. To reenable the Lisp debugger set *debugger-hook* to nil. BTW: "cdot" is multiplication "." in OOoMath. Thanks Ismael

Re: complex function works only after defining it twice

Robert Dodier — 2008-05-17T02:13:48

On Fri, May 16, 2008 at 1:40 PM, Christoph Sarnowski Not sure what you're doing, but I suspect lambda expressions (unnamed functions) could be useful here. e.g. foo : lambda ([x, y], x^2 + y^2); foo (12, b - a); => (b - a)^2 + 144 apply (foo, [12, b - a]); => (b - a)^2 + 144 If you are trying to construct differentials of functions of several variables, I think there is a package (maybe pdiff) to do that kind of stuff. Also, maybe you should try to use subscripted variables instead of distinguishing variables by constructing symbols via concat; although I'm not sure what you want here. hope this helps Robert Dodier

Re: Feature Request

Richard Hennessy — 2008-05-16T23:13:55

Another thought, to keep this simple. My request only is for wxm files opened. No batched files or loaded packages would be in the list (unless you want to take that on too). Rich ------------Original Message------------ From: "Richard Hennessy"comcast.net> To: "Maxima List" math.utexas.edu> Date: Fri, May-16-2008 6:54 PM Subject: Re: [Maxima] Feature Request Also I just thought of this. When selecting one file from one of the 4 most recent files list then the behavior should be to open or read the file depending on the setting "read file from command line" checkbox in the configuration menu. Rich ------------Original Message------------ From: "Richard Hennessy"comcast.net> To: "Maxima List" math.utexas.edu> Date: Fri, May-16-2008 6:48 PM Subject: [Maxima] Feature Request I would really like it if wxMaxima had the 4 most recent files opened listed in the File menu (or a configurable number if not 4). That is all. Rich __________________________________

Re: Feature Request

Richard Hennessy — 2008-05-16T22:54:22

Also I just thought of this. When selecting one file from one of the 4 most recent files list then the behavior should be to open or read the file depending on the setting "read file from command line" checkbox in the configuration menu. Rich ------------Original Message------------ From: "Richard Hennessy"comcast.net> To: "Maxima List" math.utexas.edu> Date: Fri, May-16-2008 6:48 PM Subject: [Maxima] Feature Request I would really like it if wxMaxima had the 4 most recent files opened listed in the File menu (or a configurable number if not 4). That is all. Rich _______________________________________________ Maxima mailing list Maxima< at >math.utexas.edu http://www.math.utexas.edu/mailman/listinfo/maxima

Feature Request

Richard Hennessy — 2008-05-16T22:48:29

I would really like it if wxMaxima had the 4 most recent files opened listed in the File menu (or a configurable number if not 4). That is all. Rich

Re: complex function works only after defining it twice

Stavros Macrakis — 2008-05-16T20:29:11

I'd recommend subst. Or something like block([x, y], [x,y]:list_of_arguments,''f). That won't work. Remember ''f evaluates at *definition time*. It is really only useful in interactive contexts. What you want here is ev(f), though that has its own issues -- so I would recommend sticking with subst. Maybe something like this: subst(map("=",'[a,b],[2,3]),a^2+b^2); or you can build a lambda if you really need a function, but that isn't as natural in the Maxima world (maybe it should be, but it isn't...). -s

Re: complex function works only after defining it twice

Christoph Sarnowski — 2008-05-16T19:40:22

Thanks for your answer! On Thu, May 15, 2008 at 06:28:05PM -0400, Stavros Macrakis wrote: I changed the name to error_fun, so this is "fixed". Ok, i did not know that ''(..) stuff was evaluated even within a non-evaluating function definition (:= ... ). I thought it would just do an extra evaluation when the function is executed. Now i know the problem was not too few evaluations, but evaluation at the wrong time. I found that out, too, and thought about doing remfunction() for those afterwards... Another thing i learned from Barton's answer. I tried concat(d_, x) for variable creation before, which didn't work. Barton uses the prefix quoted, which is fine and makes the reservoir thing obsolete. ... and learning... ;) I think i used the "thru" notation somewhere else... has something to do with c&p'ing code from someone using the while notation. I still am overwhelmed with the simplicity of Barton's solution. As i answered him (but forgot to CC to mailing list), i am now building my code upon

Re: complex function works only after defining it

Edwin Woollett — 2008-05-16T18:37:48

Hi Christoph, Stavros Macrakis wrote on Thu, 15 May 2008 18:28:05 -0400: ===================================== Here is a simple example using an expression (rather than a Maxima function): (%i1) display2d:false$ (%i2) er(f,args) := xreduce("+", makelist( abs(diff(f,a)) * del(a) , a, args) ) $ (%i3) f: (x^2 + y^2)/(%pi + z^2)$ (%i4) fargs : listofvars(f); (%o4) [x,y,z] (%i5) er(f,fargs); (%o5) 2*(y^2+x^2)*abs(z)*del(z)/(z^2+%pi)^2 +2*abs(y)*del(y)/(z^2+%pi)+2*abs(x)*del(x)/(z^2+%pi) ===================================== Ted Woollett