Re: [Help-glpk] interfaces and platforms
Let me explain and answer to your questions: First, I have registed to the mailing list, second, I'm master student and I'm writing my master thesis where I use GLPK in a OPEN SOURCE project( https://bitbucket.org/pschaus/scampi/wiki/Home ) for this reason I would like to have a source differant from wikipedia. I dont see why you are so angry. Whot I do is using GLPK and writing in my thesis. On Mon, Feb 6, 2012 at 9:48 PM, Robbie Morrison rob...@actrix.co.nz wrote: Hello First up, you should register if you wish to post to this list. That means the maintainer does not need to waste his time with cross-posting. Just curious as to why you think the GLPK wikibook is not reliable? Our community (myself included) invest a fair bit effort in keeping it correct and current. Can you point to any mistakes, for example? If you need to cite peer-reviewed literature for some reason, then you're pretty much outa luck. You need to remember that GLPK is an open source project. We all take pride in producing good work and providing good support. So whilst the controls on quality are not formal, as happens in scientific publishing, they are, nonetheless, active and vibrant. Maybe you could talk to your boss or supervisor and suggest that, in this case, well maintained open source documentation can be of high standard and should not be unceremoniously dismissed. Conversely, my experiences with scientific peer-review have left me underwhelmed. In addition, much of the academic programming I've seen is just awful in relation to software engineering and good practice. In contrast, GLPK is coded to a very high standard and is widely tested. HTH, Robbie To: help-glpk help-glpk@gnu.org Subject: Re: [Help-glpk] interfaces and platforms From: name name ono...@gmail.com Date: Mon, 6 Feb 2012 14:49:15 +0100 I have seen that but i need some sources which are more relaible (it is for an project). Is there another source ? Thanks On Mon, Feb 6, 2012 at 2:25 PM, Andrew Makhorin m...@gnu.org wrote: Could you tell me in which platforms GLPK works and in which languages there are an interface for GLPK. Please see: http://en.wikipedia.org/wiki/GNU_Linear_Programming_Kit http://en.wikibooks.org/wiki/GLPK --- Robbie Morrison PhD student -- policy-oriented energy system simulation Institute for Energy Engineering (IET) Technical University of Berlin (TU-Berlin), Germany University email (redirected) : morri...@iet.tu-berlin.de Webmail (preferred) : rob...@actrix.co.nz [from Webmail client] ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] interfaces and platforms
In fact, I need source which is respected source. I think it will be more respected source if the information was in the site http://www.gnu.org/software/glpk/ or http://bjoern.dapnet.de/glpk/ or in the documantation which cames with glpk or in one of those sites. My problem if not that I dont trast those informations or I think that it is not corret but I think I would have problem if I citate those sites. On Wed, Feb 8, 2012 at 5:55 AM, Michael Hennebry henne...@web.cs.ndsu.nodak.edu wrote: On Wed, 8 Feb 2012, Harley wrote: I think Robbie's comments were in response to the 'more reliable' part of your email. Robbie has worked very hard on the wikibook for GLPK and it is an excellent reference and it is not wikipedia as it has been created by the GLPK users but also has not been formally peer reviewed. Given that many participants on this list do not have English as their first language, we need to be careful about interpreting the intentions of the writer. I don't believe that Robbie's comments are angry just as I believe that there may have been a misunderstanding in the original email about the difference between wikipedia (not much standing in the academic world) and the GLPK wikibook that has been put together by the users of GLPK. My suspicion is that what is needed is not a more reliable source. What is needed is probably a more respected source. Quite possibly anything with wiki in the name is unacceptable. If reliability really is the issue, what is the measure of reliablilty? By any chance, would the information desired be in the documentation that comes in the GLPK tarball? I definitely would recommend reading the wikibook for GLPK as it does contain answers to your questions (http://en.wikibooks.org/wiki/**GLPKhttp://en.wikibooks.org/wiki/GLPK ). Regards, Harley Mackenzie On 8/02/12 5:47 AM, name name wrote: Let me explain and answer to your questions: First, I have registed to the mailing list, second, I'm master student and I'm writing my master thesis where I use GLPK in a OPEN SOURCE project( https://bitbucket.org/pschaus/**scampi/wiki/Homehttps://bitbucket.org/pschaus/scampi/wiki/Home) for this reason I would like to have a source differant from wikipedia. I dont see why you are so angry. Whot I do is using GLPK and writing in my thesis. On Mon, Feb 6, 2012 at 9:48 PM, Robbie Morrison rob...@actrix.co.nzmailto: rob...@actrix.co.nz wrote: Hello First up, you should register if you wish to post to this list. That means the maintainer does not need to waste his time with cross-posting. Just curious as to why you think the GLPK wikibook is not reliable? Our community (myself included) invest a fair bit effort in keeping it correct and current. Can you point to any mistakes, for example? If you need to cite peer-reviewed literature for some reason, then you're pretty much outa luck. You need to remember that GLPK is an open source project. We all take pride in producing good work and providing good support. So whilst the controls on quality are not formal, as happens in scientific publishing, they are, nonetheless, active and vibrant. -- Michael henne...@web.cs.ndsu.nodak.edu On Monday, I'm gonna have to tell my kindergarten class, whom I teach not to run with scissors, that my fiance ran me through with a broadsword. -- Lily __**_ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/**listinfo/help-glpkhttps://lists.gnu.org/mailman/listinfo/help-glpk ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] interfaces and platforms
Dear all, Could you tell me in which platforms GLPK works and in which languages there are an interface for GLPK. Thank you in advance Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] interfaces and platforms
I have seen that but i need some sources which are more relaible (it is for an project). Is there another source ? Thanks On Mon, Feb 6, 2012 at 2:25 PM, Andrew Makhorin m...@gnu.org wrote: Could you tell me in which platforms GLPK works and in which languages there are an interface for GLPK. Please see: http://en.wikipedia.org/wiki/GNU_Linear_Programming_Kit http://en.wikibooks.org/wiki/GLPK ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] glp_get_status
Hello, For the LP model the whot is the value for the GLP_INFEAS (solution is infeasible) ? Is there another value for the problems SUBOPTIMAL if not what the status will send? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] glp_get_status
I solve LP model like this glp_simplex(lp, parm) I wont like to have the status of the solution to ba able to write something like this if(status ==optimal)... else if (status== infisible) how can I do that? On Mon, Oct 17, 2011 at 6:45 PM, Robbie Morrison rob...@actrix.co.nzwrote: To: name name ono...@gmail.com Subject: Re: [Help-glpk] glp_get_status Message-ID: 1318860955.25925.18.camel@corvax From: Andrew Makhorin m...@gnu.org Date: Mon, 17 Oct 2011 18:15:55 +0400 For the LP model the whot is the value for the GLP_INFEAS (solution is infeasible) ? Is there another value for the problems SUBOPTIMAL if not what the status will send? Your question is unclear. Please reformulate it. Solution statuses returned by glp_get_status, glp_get_prim_stat, and glp_get_dual_stat are described in the glpk reference manual included in the distribution. Follow up (not the clearest question in the world, I gota say): The code GLP_FEAS implies the current solution is suboptimal and the code GLP_OPT means an optimal solution has been found. Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : morri...@iet.tu-berlin.de Webmail (preferred) : rob...@actrix.co.nz [from Webmail client] ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] glpk_4_47_java.dll: Can't find dependent libraries
Hello I have just downloaded glpk 4.47 for using in eclipce. I put jar in the path and jar points to the file where is glpk_4_47_java.dll and also glpk_4_47.dll I got this error when I wont to use glpk. The dynamic link library for GLPK for Java could not beloaded. Consider using java -Djava.library.path= Exception in thread main java.lang.UnsatisfiedLinkError: C:\Users\glpk_4_47_java.dll: Can't find dependent libraries Can you tell me what is libraries should I add to the path? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] /opt/glpk/libglpk_java.so: undefined symbol: glp_error_hook
Hello, I'm using glpk with sbt I have just installed glpk in this computer (to be able to use or-toolshttp://code.google.com/p/or-tools/)and I can't use glpk with sbt I got /opt/glpk/libglpk_java.so: undefined symbol: glp_error_hook error can you help me ? Thank Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] dual values
I'm not interested in dual value of x_16 but in others (x_1 to x_15) I got 6.0 1.0 1.0 5.0 2.0 7.0 7.0 6.0 3.0 3.0 7.0 8.0 -22.0 2.0 5.0 sholdn't it be 6.0 1.0 1.0 5.0 2.0 7.0 0.0 6.0 3.0 3.0 0.0 0.0 0.0 2.0 5.0 ? On Thu, Oct 6, 2011 at 7:50 AM, glpk xypron xypron.g...@gmx.de wrote: Hello, you will have remarked that glpsol outputs: PROBLEM HAS NO DUAL FEASIBLE SOLUTION because any unbounded value of x_16 will solve the problem. If you add constraints for x_16 you will get the expected result, e.g. var x_1; var x_2; var x_3; var x_4; var x_5; var x_6; var x_7; var x_8; var x_9; var x_10; var x_11; var x_12; var x_13; var x_14; var x_15; var x_16, = 1, =0; minimize objective: + 6 * x_1 + x_2 + x_3 + 5 * x_4 + 2 * x_5 + 7 * x_6 + 7 * x_7 + 6 * x_8 + 3 * x_9 + 3 * x_10 + 7 * x_11 + 8 * x_12 + 8 * x_13 + 2 * x_14 + 5 * x_15; s.t. constraint1: + x_1 = 1; s.t. constraint2: + x_2 = 1; s.t. constraint3: + x_3 = 1; s.t. constraint4: + x_4 = 1; s.t. constraint5: + x_5 = 1; s.t. constraint6: + x_6 = 1; s.t. constraint7: + x_7 + x_16 = 1; s.t. constraint8: + x_8 = 1; s.t. constraint9: + x_9 = 1; s.t. constraint10: + x_10 = 1; s.t. constraint11: + x_16 + x_11 = 1; s.t. constraint12: + x_16 + x_12 = 1; s.t. constraint13: + x_13 + x_16 = 1; s.t. constraint14: + x_14 = 1; s.t. constraint15: + x_15 = 1; solve; printf x_7.dual=%f\n, x_7.dual; printf x_11.dual=%f\n,x_11.dual; printf x_12.dual=%f\n,x_12.dual; printf x_13.dual=%f\n,x_13.dual; end; Best regards Xypron Original-Nachricht Datum: Wed, 5 Oct 2011 12:28:46 +0200 Betreff: [Help-glpk] dual values Hello, I'm adding a column in a model and when I calculate the dual values I got wrong results Minimize objective: + 6 x_1 + x_2 + x_3 + 5 x_4 + 2 x_5 + 7 x_6 + 7 x_7 + 6 x_8 + 3 x_9 + 3 x_10 + 7 x_11 + 8 x_12 + 8 x_13 + 2 x_14 + 5 x_15 Subject To constraint1: + x_1 = 1 constraint2: + x_2 = 1 constraint3: + x_3 = 1 constraint4: + x_4 = 1 constraint5: + x_5 = 1 constraint6: + x_6 = 1 constraint7: + x_7 + x_16 = 1 constraint8: + x_8 = 1 constraint9: + x_9 = 1 constraint10: + x_10 = 1 constraint11: + x_16 + x_11 = 1 constraint12: + x_16 + x_12 = 1 constraint13: + x_13 + x_16 = 1 constraint14: + x_14 = 1 constraint15: + x_15 = 1 End I have added x-16. Shouldn't the dual for the variables x_7, x_11 , x_12 and x_13 be equal to 0 ? Thank you Onor -- Follow me at http://twitter.com/#!/xypron Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] dual values
Hello, I'm adding a column in a model and when I calculate the dual values I got wrong results Minimize objective: + 6 x_1 + x_2 + x_3 + 5 x_4 + 2 x_5 + 7 x_6 + 7 x_7 + 6 x_8 + 3 x_9 + 3 x_10 + 7 x_11 + 8 x_12 + 8 x_13 + 2 x_14 + 5 x_15 Subject To constraint1: + x_1 = 1 constraint2: + x_2 = 1 constraint3: + x_3 = 1 constraint4: + x_4 = 1 constraint5: + x_5 = 1 constraint6: + x_6 = 1 constraint7: + x_7 + x_16 = 1 constraint8: + x_8 = 1 constraint9: + x_9 = 1 constraint10: + x_10 = 1 constraint11: + x_16 + x_11 = 1 constraint12: + x_16 + x_12 = 1 constraint13: + x_13 + x_16 = 1 constraint14: + x_14 = 1 constraint15: + x_15 = 1 End I have added x-16. Shouldn't the dual for the variables x_7, x_11 , x_12 and x_13 be equal to 0 ? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] status of solution
I solve lp problem ans I got status of solution 0 when it found the optimal solution ans alos i got 0 when the problem has unbounded solution How can I knew whit status if it has an optimal solution or not? parm = new glp_smcp() glp_init_smcp(parm) status = GLPK.glp_simplex(lp, parm) Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] release memory
I use ubuntu and run glpk with terminal. when I run 1 example I the memory after termination of programme is 120mb and If I run 5 times (in a for) the memory use is 300mb. after termination I have glp_delete_prob(lp) glp_free_env() :the resulte is 0 On Thu, Sep 8, 2011 at 6:50 PM, Robbie Morrison rob...@actrix.co.nz wrote: To: help-glpk help-glpk@gnu.org Subject: [Help-glpk] release memory From: name name ono...@gmail.com Date: Thu, 8 Sep 2011 17:35:59 +0200 Hello, I have some problem with releasing memory in scala. after solving model I use GLPK.glp_free_env() but the memory doesn't decries. [snip] Hello again Onor Did you check the return code from GLPK.glp_free_env()? The GLPK manual states: The routine 'glp_free_env' returns one of the following codes: 0 = termination successful 1 = environment is inactive (was not initialized). GLPK also provides the function 'glp_mem_usage' to report on memory usage. If a wrapper is provided to this call, then that could be useful for troubleshooting your issue. HTH too, Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : morri...@iet.tu-berlin.de Webmail (preferred) : rob...@actrix.co.nz [from Webmail client] ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] release memory
Hello, I have some problem with releasing memory in scala. after solving model I use GLPK.glp_free_env() but the memory doesn't decries. Could you tell me how can I relese the memory ? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] type of variables
Hello, I have a very strange problem I solve un Lp problem but the and the value of my variables are not ineger I got x(0,1)=0.2... even thaught when I print the type of my variables I got 3 coresponding to type binary( I got type to binary for all variables with GLPK.glp_set_col_kind(lp, i, GLPKConstants.GLP_BV)). Can you tell my where the problem could be? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] type of variables
On Mon, Sep 5, 2011 at 1:18 PM, Nigel Galloway nigel_gallo...@operamail.com wrote: Do you obtain this value with GLPK.glp_get_mip_col_val ? no with .glp_set_col_kind Even if the type of variable is binary Lp give non integer value -- Nigel Galloway nigel_gallo...@operamail.com On Mon, 05 Sep 2011 09:52 +0200, name name ono...@gmail.com wrote: Hello, I have a very strange problem I solve un Lp problem but the and the value of my variables are not ineger I got x(0,1)=0.2... even thaught when I print the type of my variables I got 3 coresponding to type binary( I got type to binary for all variables with GLPK.glp_set_col_kind(lp, i, GLPKConstants.GLP_BV)). Can you tell my where the problem could be? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.orghttps://lists.gnu.org/mailman/listinfo/help-glpk -- http://www.fastmail.fm - Email service worth paying for. Try it for free ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] variable with the same lower ans upper bounds
Hello, In my problem I have some variables which has the same lover and upper bounds and I got an error column 1: lb = 0, ub = 0; incorrect bounds The problem could not be solved How can I solve this problem ? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] feasible solution for MIP
Hello, I have a hard MIP problem and glpk can't solve it. How can I change the parameters for fining a feasible solution ? Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] The dynamic link library for GLPK for Java could not beloaded.
I'm using from bst first run works but second I got The dynamic link library for GLPK for Java could not beloaded. Consider using java -Djava.library.path= I run as follow: java -Djava.library.path=/opt/glpk -Xmx512M -jar /bin/sbt-launch.jar On Wed, Jul 27, 2011 at 9:06 PM, Xypron xypron.g...@gmx.de wrote: ** Dear Onor, the Java system parameter java.library.path defines the directories that are searched for native libraries. java.library.path should point to the directory where you have stored Linux: libglpk_java.so Windows: glpk_4_45_java.dll On Linux this path typically is /usr/local/lib/jni, or /usr/lib/jni. For example you could call your Java class like this: java -Djava.library.path=/usr/local/lib/jni MyClass If you start your program from Netbeans or Eclipse, you can save the parameter value in the project properties. Best regards Xypron On 27.07.2011 19:27, name name wrote: Hello, I have just change my java version and I can't run any more glpk I got The dynamic link library for GLPK for Java could not beloaded. Consider using java -Djava.library.path= whot should i do? how can I change java -Djava.library.path? where is it and where should I put it? thank you Onor ___ Help-glpk mailing listHelp-glpk@gnu.orghttps://lists.gnu.org/mailman/listinfo/help-glpk ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] implementing constraints in Scala
I have this problem \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End After solving I got this No. Row name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 constraint1 NL48 48 0.2 2 constraint2 NL35 35 0.5 3 constraint3 NL24 24 0.5 4 constraint4 NL10 10 0.5 5 constraint5 NL 8 81 then I pass to dual with GLPK.glp_get_row_dual(lp,rowId+1) (which give all 0) I got error when I try to make bounds with GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_DB, low, up) On Fri, Aug 5, 2011 at 7:31 PM, glpk xypron xypron.g...@gmx.de wrote: Hello Onor, please, provide the Java code which produces the error. Best regards Xypron Original-Nachricht Datum: Wed, 3 Aug 2011 15:09:33 +0200 Betreff: Re: [Help-glpk] implementing constraints in Scala Hello again, I have one more question :( This time I have a problem with dual I get dual (all the lines with GLPK.glp_get_col_dual(lp,colId+1) but just after when it's going to put bounds I got an error A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x7f0cca36a1c4, pid=6605, tid=139692915328768 # # JRE version: 6.0_26-b03 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.1-b02 mixed mode linux-amd64 compressed oops) # Problematic frame: # C [libglpk.so.0+0x91c4] __float128+0x14 Whot can I do ? Thank you again Onor -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] implementing constraints in Scala
My probleme is Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End Optimal basic solution to my lpi s obtained with glpsol is the following: Rows: 5 Columns:5 Non-zeros: 5 Status: OPTIMAL Objective: objective = 52.1 (MINimum) No. Row name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 constraint1 NL48 48 0.2 2 constraint2 NL35 35 0.5 3 constraint3 NL24 24 0.5 4 constraint4 NL10 10 0.5 5 constraint5 NL 8 81 No. Column name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 x_1 B9.6 0 2 x_2 B 17.5 0 3 x_3 B 12 0 4 x_4 B 5 0 5 x_5 B 8 0 From here I wont to get the dual for all rows I should have 0.2 0.5 0.5 0.5 1 but I got 0 for all rows I use GLPK.glp_get_row_dual(lp, rowId+1) Can you tell me where the problem is? Thank you ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] problem with dual
Hello, I have a model like this. When I try to get a dual I have all value 0. GLPK.glp_get_col_dual(lp,colId+1) send 0 for all value. How can I solve this problem? Thank you Onor P.S. my model is \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] problem with dual
I printt model ans solution how shoud I understund that? glp_print_sol give a this file Problem: Rows: 5 Columns:5 Non-zeros: 5 Status: UNDEFINED Objective: objective = 0 (MINimum) No. Row name St Activity Lower bound Upper boundMarginal -- -- - - - - 1 constraint1 B 048 2 constraint2 B 035 3 constraint3 B 024 4 constraint4 B 010 5 constraint5 B 0 8 No. Column name St Activity Lower bound Upper boundMarginal -- -- - - - - 1 NL 0 0 eps 2 NL 0 0 eps 3 NL 0 0 eps 4 NL 0 0 eps 5 NL 0 0 eps Karush-Kuhn-Tucker optimality conditions: KKT.PE http://kkt.pe/: max.abs.err = 0.00e+00 on row 0 max.rel.err = 0.00e+00 on row 0 High quality KKT.PB: max.abs.err = 4.80e+01 on row 1 max.rel.err = 9.80e-01 on row 1 PRIMAL SOLUTION IS INFEASIBLE KKT.DE http://kkt.de/: max.abs.err = 1.00e+00 on column 1 max.rel.err = 5.00e-01 on column 1 DUAL SOLUTION IS WRONG KKT.DB: max.abs.err = 0.00e+00 on row 0 max.rel.err = 0.00e+00 on row 0 High quality End of output glp_write_lp give this: \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End - Show quoted text - ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] problem with dual
I printt model ans solution how shoud I understund that? glp_print_sol give a this file Problem: Rows: 5 Columns:5 Non-zeros: 5 Status: UNDEFINED Objective: objective = 0 (MINimum) No. Row name St Activity Lower bound Upper boundMarginal -- -- - - - - 1 constraint1 B 048 2 constraint2 B 035 3 constraint3 B 024 4 constraint4 B 010 5 constraint5 B 0 8 No. Column name St Activity Lower bound Upper boundMarginal -- -- - - - - 1 NL 0 0 eps 2 NL 0 0 eps 3 NL 0 0 eps 4 NL 0 0 eps 5 NL 0 0 eps Karush-Kuhn-Tucker optimality conditions: KKT.PE http://kkt.pe/: max.abs.err = 0.00e+00 on row 0 max.rel.err = 0.00e+00 on row 0 High quality KKT.PB: max.abs.err = 4.80e+01 on row 1 max.rel.err = 9.80e-01 on row 1 PRIMAL SOLUTION IS INFEASIBLE KKT.DE http://kkt.de/: max.abs.err = 1.00e+00 on column 1 max.rel.err = 5.00e-01 on column 1 DUAL SOLUTION IS WRONG KKT.DB: max.abs.err = 0.00e+00 on row 0 max.rel.err = 0.00e+00 on row 0 High quality End of output glp_write_lp give this: \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] problem with dual
I can't see where the probleme is coming model primar is \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End I solve and get getObjectiveValue master obj:52.1 then I wont to pass a dual solution for this I do GLPK.glp_get_col_dual(lp,colId+1) for all collone and I got this. ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] problem with dual
How can I get the upper bound for the rows? No. Row name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 constraint1 NL48 48 0.2 2 constraint2 NL35 35 0.5 3 constraint3 NL24 24 0.5 4 constraint4 NL10 10 0.5 5 constraint5 NL 8 81 0.2 0.5 0.5 0.5 1 On Fri, Aug 5, 2011 at 4:38 PM, Andrew Makhorin m...@gnu.org wrote: I can't see where the probleme is coming model primar is \* Problem: Unknown *\ Minimize objective: + x_1 + x_2 + x_3 + x_4 + x_5 Subject To constraint1: + 5 x_1 = 48 constraint2: + 2 x_2 = 35 constraint3: + 2 x_3 = 24 constraint4: + 2 x_4 = 10 constraint5: + x_5 = 8 End I solve and get getObjectiveValue master obj:52.1 then I wont to pass a dual solution for this I do GLPK.glp_get_col_dual(lp,colId+1) for all collone and I got this. Optimal basic solution to your lp I obtained with glpsol is the following: Rows: 5 Columns:5 Non-zeros: 5 Status: OPTIMAL Objective: objective = 52.1 (MINimum) No. Row name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 constraint1 NL48 48 0.2 2 constraint2 NL35 35 0.5 3 constraint3 NL24 24 0.5 4 constraint4 NL10 10 0.5 5 constraint5 NL 8 81 No. Column name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 x_1 B9.6 0 2 x_2 B 17.5 0 3 x_3 B 12 0 4 x_4 B 5 0 5 x_5 B 8 0 Note that all columns (variables) are basic at the optimum, so they all have zero reduced costs, that is, dual values. ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] problem with dual
When I use glp_get_row_dual(lp,rowId+1) I got 0 for all rows. On Fri, Aug 5, 2011 at 5:48 PM, Andrew Makhorin m...@gnu.org wrote: How can I get the upper bound for the rows? With glp_get_row_ub. However, rows in your instance have no upper bounds. No. Row name St Activity Lower bound Upper bound Marginal -- -- - --- --- 1 constraint1 NL48 48 0.2 2 constraint2 NL35 35 0.5 3 constraint3 NL24 24 0.5 4 constraint4 NL10 10 0.5 5 constraint5 NL 8 81 0.2 0.5 0.5 0.5 1 These values are row duals, not upper bounds. Please consult any tutorial on lp basics. ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] implementing constraints in Scala
Hello again, I have one more question :( This time I have a problem with dual I get dual (all the lines with GLPK.glp_get_col_dual(lp,colId+1) but just after when it's going to put bounds I got an error A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x7f0cca36a1c4, pid=6605, tid=139692915328768 # # JRE version: 6.0_26-b03 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.1-b02 mixed mode linux-amd64 compressed oops) # Problematic frame: # C [libglpk.so.0+0x91c4] __float128+0x14 Whot can I do ? Thank you again Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] implementing constraints in Scala
Thank you a lot I have a little question that I didn't fine in glpk.pdf How can I add a variable in the objective after creating objective (I can have the coefficiente with GLPK.glp_get_obj_coef(lp,i) but I don't knew the size of coefficient)? Can I just add a variable without coping twice all coefficients? Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk] implementing constraints in Scala
How can I print hole model, objective + constrains ?
Set the uper bount to infinity and get uper/lower bount of a variable?
On Sun, Jul 31, 2011 at 6:58 PM, glpk xypron xypron.g...@gmx.de wrote:
Hello Onor,
for (i - 0 to col.size-1) {
GLPK.glp_set_obj_coef(lp, i,coef(i))
}
if you have n columns, GLPK number these 1 to n. You possibly
wanted to write:
GLPK.glp_set_obj_coef(lp, i + 1,coef(i))
Cf. sample.c on page 15 of glpk-4.45/doc/glpk.pdf
GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_LO, 0,1000)
The number 1000 will be ignored.
The lower bound will be set to 0.
Best regards
Xypron
Original-Nachricht
Datum: Sun, 31 Jul 2011 16:07:01 +0200
Betreff: Re: [Help-glpk] implementing constraints in Scala
thank you very much I have some more question
there is a problem I got no solution and i dont knew why.
Could you tell me in which function(s) is the problem?
the contraints I did as you told me. I change only GLP_UP; FX
startModelBuilding(nbRows : Int, nbCols : Int){
lp = GLPK.glp_create_prob()
GLPK.glp_add_cols(lp, nbCols)
}
def setBounds(colId : Int, low : Double, up : Double) {
GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_DB, low, up)
}
def setUnboundUpperBound(colId : Int) {
GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_LO, 0,1000)
}
def addObjective(coef : Array[Double], col : Array[Int], minMode :
Boolean = true) {
GLPK.glp_set_obj_name(lp, objective);
GLPK.glp_set_obj_dir(lp, if (minMode) GLPKConstants.GLP_MIN else
GLPKConstants.GLP_MAX)
for (i - 0 to col.size-1) {
GLPK.glp_set_obj_coef(lp, i,coef(i))
}
}
def solveModel() : Int = {
println(solveModel);
val iocp = new glp_iocp();
GLPK.glp_init_iocp(iocp);
iocp.setPresolve(
GLPKConstants.GLP_ON);
val ret = GLPK.glp_intopt(lp, iocp);
if (ret == 0) {
sol = Array.tabulate(nbCols)(col = GLPK.glp_mip_col_val(lp,col
+1))
objectiveValue = GLPK.glp_mip_obj_val(lp)
ret
} else {
System.out.println(The problem could not be solved);
ret
--
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Re: [Help-glpk] implementing constraints in Scala
thank you very much I have some more question
there is a problem I got no solution and i dont knew why.
Could you tell me in which function(s) is the problem?
the contraints I did as you told me. I change only GLP_UP; FX
startModelBuilding(nbRows : Int, nbCols : Int){
lp = GLPK.glp_create_prob()
GLPK.glp_add_cols(lp, nbCols)
}
def setBounds(colId : Int, low : Double, up : Double) {
GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_DB, low, up)
}
def setUnboundUpperBound(colId : Int) {
GLPK.glp_set_col_bnds(lp, colId+1, GLPKConstants.GLP_LO, 0,1000)
}
def addObjective(coef : Array[Double], col : Array[Int], minMode :
Boolean = true) {
GLPK.glp_set_obj_name(lp, objective);
GLPK.glp_set_obj_dir(lp, if (minMode) GLPKConstants.GLP_MIN else
GLPKConstants.GLP_MAX)
for (i - 0 to col.size-1) {
GLPK.glp_set_obj_coef(lp, i,coef(i))
}
}
def solveModel() : Int = {
println(solveModel);
val iocp = new glp_iocp();
GLPK.glp_init_iocp(iocp);
iocp.setPresolve(
GLPKConstants.GLP_ON);
val ret = GLPK.glp_intopt(lp, iocp);
if (ret == 0) {
sol = Array.tabulate(nbCols)(col = GLPK.glp_mip_col_val(lp,col
+1))
objectiveValue = GLPK.glp_mip_obj_val(lp)
ret
} else {
System.out.println(The problem could not be solved);
ret
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[Help-glpk] implementing contrants in Scala
I would like to implment glpk in scala.
def addConstraintLessEqual(coef : Array[Double], col : Array[Int], rhs :
Double) {
nbRows += 1
GLPK.glp_add_rows(lp, 1);
GLPK.glp_set_row_name(lp, 1, constraint+nbRows);
GLPK.glp_set_row_bnds(lp, 1, GLPKConstants.GLP_UP, rhs, 0)
val ind = GLPK.new_intArray(col.size)
for (i - 1 to col.size) {
GLPK.intArray_setitem(ind, i, col(i-1)+1);
}
val values = GLPK.new_doubleArray(col.size);
for (i - 1 to col.size) {
GLPK.doubleArray_setitem(values, col(i-1)+1, coef(i-1));
}
GLPK.glp_set_mat_row(lp, nbRows, col.size, ind, values)
println(addConstraintLessEqual: end);
}
could you tell me where is the problem ?
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[Help-glpk] The dynamic link library for GLPK for Java could not beloaded.
Hello, I have just change my java version and I can't run any more glpk I got The dynamic link library for GLPK for Java could not beloaded. Consider using java -Djava.library.path= whot should i do? how can I change java -Djava.library.path? where is it and where should I put it? thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] installing glpk in java
Hello, I would like to use glpk in java could you tell me how can i do it? Is there only one .so file to put in the pacege in java or two and where can i find them. Thank you Onor ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
[Help-glpk] abs/min/max
Hello,
Could you tell me how can I calculate
minimize obj :
max({i in 1..4}: abs(x[i]));
or
minimize obj :
max({i in 1..4}: min(x[i]);
Thank you
Onor
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[Help-glpk] abs
Hello,
I want to calculate
var y,=0;
maximize obj:
abs(1-y);
fa:
...
fb:
...
solve;
...
data;
...
I get the argument for abs has invalide type, could you tell me how I could
do this?
Is it possible to solve the maximization probleme several times?
something like this
var y,=0;
{k in 1 .. 20} :
/* To get the solution for k=1, solution for k=2 ...*/
maximize obj:
abs(1-y);
fa:
...
fb:
...
solve;
...
data;
...
And the last question
How can I compile an model model.mod where the data is in a file model.dat
Thank you a lot
Onor
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[Help-glpk] solving Linear Programming with glpsol
Hi, I would like to solve the linear programming with glpsol and i have some problemes Can you just tell me in which format should I write my minimisation and maximisation problems and the commend line to solve them P.S. the equations are max... contrants Thanks Onor ___ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
