From: SourceForge.net <noreply@so...>  20100911 05:51:35

Bugs item #3064087, was opened at 20100911 05:51 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Plotting Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: 2dplot doesn't recognise internal form for pi etc Initial Comment: seems like gnuplot wants to see %pi instead of \pi  so wxplot2d(sin(%pi*x), [a,5,5])$ works, but wxplot2d(sin(\pi*x), [a,5,5])$ fails with plot2d: expression evaluates to nonnumeric value somewhere in plotting range. as does sin(%pi*x); wxplot2d([%], [a,5,5])$ (i.e. macsyma is converting %pi to some internal representation which is shown as the greek letter pi, and pastes into notepad as \pi) Maxima version: 5.22.1 Maxima build date: 11:48 8/13/2010 Host type: i686pcmingw32 Lisp implementation type: GNU Common Lisp (GCL) Lisp implementation version: GCL 2.6.8  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 
From: SourceForge.net <noreply@so...>  20100911 06:03:45

Bugs item #3064087, was opened at 20100911 05:51 Message generated for change (Comment added) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Plotting Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: 2dplot doesn't recognise internal form for pi etc Initial Comment: seems like gnuplot wants to see %pi instead of \pi  so wxplot2d(sin(%pi*x), [a,5,5])$ works, but wxplot2d(sin(\pi*x), [a,5,5])$ fails with plot2d: expression evaluates to nonnumeric value somewhere in plotting range. as does sin(%pi*x); wxplot2d([%], [a,5,5])$ (i.e. macsyma is converting %pi to some internal representation which is shown as the greek letter pi, and pastes into notepad as \pi) Maxima version: 5.22.1 Maxima build date: 11:48 8/13/2010 Host type: i686pcmingw32 Lisp implementation type: GNU Common Lisp (GCL) Lisp implementation version: GCL 2.6.8  >Comment By: https://www.google.com/accounts () Date: 20100911 06:03 Message: Sorry! Errors/typos in original post  but bug is real! seems like gnuplot wants to see %pi instead of \pi  so wxplot2d(sin(%pi*x), [x,5,5])$ works, but wxplot2d(sin(\pi*x), [x,5,5])$ fails with plot2d: expression evaluates to nonnumeric value somewhere in plotting range. both versions (i.e. using \pi and %pi) display as the greek letter pi, but plot only likes the %pi version. Also, curiously, sin(%pi*x)sin(\pi*x); is not recognised as 0 although sin(\pi*x)sin(\pi*x); is  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 
From: SourceForge.net <noreply@so...>  20100912 11:15:29

Bugs item #3064087, was opened at 20100911 07:51 Message generated for change (Comment added) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Plotting Group: None >Status: Closed >Resolution: Invalid Priority: 5 Private: No Submitted By: https://www.google.com/accounts () Assigned to: Nobody/Anonymous (nobody) Summary: 2dplot doesn't recognise internal form for pi etc Initial Comment: seems like gnuplot wants to see %pi instead of \pi  so wxplot2d(sin(%pi*x), [a,5,5])$ works, but wxplot2d(sin(\pi*x), [a,5,5])$ fails with plot2d: expression evaluates to nonnumeric value somewhere in plotting range. as does sin(%pi*x); wxplot2d([%], [a,5,5])$ (i.e. macsyma is converting %pi to some internal representation which is shown as the greek letter pi, and pastes into notepad as \pi) Maxima version: 5.22.1 Maxima build date: 11:48 8/13/2010 Host type: i686pcmingw32 Lisp implementation type: GNU Common Lisp (GCL) Lisp implementation version: GCL 2.6.8  >Comment By: Dieter Kaiser (crategus) Date: 20100912 13:15 Message: I do not see a problem. Maxima uses %pi for the mathematical constant not 'pi', 'Pi' or '\pi'. You have to pass a valid Maxima expression to the plot functions (not something which might be internal in gnuplot) . Therefore, you have to pass the function sin(%pi*x), if the argument should involve the mathematical constant. The expression sin(\pi*x) is possible too, but for this case \pi is an unknown symbol for Maxima. Because of this unknown symbol you get no plot and sin(%pi*x) is not equal to sin(\pi*x). Closing this bug report as invalid. Dieter Kaiser  Comment By: https://www.google.com/accounts () Date: 20100911 08:03 Message: Sorry! Errors/typos in original post  but bug is real! seems like gnuplot wants to see %pi instead of \pi  so wxplot2d(sin(%pi*x), [x,5,5])$ works, but wxplot2d(sin(\pi*x), [x,5,5])$ fails with plot2d: expression evaluates to nonnumeric value somewhere in plotting range. both versions (i.e. using \pi and %pi) display as the greek letter pi, but plot only likes the %pi version. Also, curiously, sin(%pi*x)sin(\pi*x); is not recognised as 0 although sin(\pi*x)sin(\pi*x); is  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3064087&group_id=4933 