Plots used to work but now don't. Also, the error message doesn't make sense,

[pnachtwey]

I have a problem graphing position, speed and acceleration. This program has worked for many years until I installed the new version of wxMaxima

Compute the position, velocity and acceleration for all the motion segments

 -->	pva(t):= (
	    if t<t01 then
	        ( t: t-t0, [x0+v0*t+(a0/2)*t^2+(j/6)*t^3, v0+a0*t+(j/2)*t^2,a0+j*t] )
	    elseif t1<=t and t<t2 then
	        ( t: t-t1, [ x1+v1*t+(a/2)*t^2,v1+a*t,a ] )
	    elseif t2<=t and t<t3 then
	        ( t: t-t2, [x2+v2*t+(a/2)*t^2-(j/6)*t^3, v2+a*t-(j/2)*t^2, a-j*t] )
	    elseif t3<=t and t<t4 then
	        ( t: t-t3, [x3+v*t, v, 0 ] )
	    elseif t4<=t and t<t5 then
	        ( t: t-t4, [ x4+v*t-(j/6)*t^3, v-(j/2)*t^2, -j*t] )
	    elseif t5<=t and t<t6 then
	        ( t: t-t5, [ x5+v5*t-(d/2)*t^2, v5-d*t, -d ] )
	    elseif t6<=t and t<t7 then
	        ( t: t-t6, [ x6+v6*t-(d/2)*t^2+(j/6)*t^3,v6-d*t+(j/2)*t^2, -d+j*t ] )
	    else
	        ( t: t-t7, [ x7+v7*t+(a7/2)*t^2 ,v7+a7*t,a7 ] )
	)$

Plot the position, velocity and acceleration for all the motion segments

 -->	wxplot2d(pva(t)[1],[t,t0,t8],[xlabel,"Time"],[ylabel,"Position"],[legend,"Postion"]);
	wxplot2d(pva(t)[2],[t,t0,t8],[xlabel,"Time"],[ylabel,"Velocity"],[legend,"Velocity"]);
	wxplot2d(pva(t)[3],[t,t0,t8],[xlabel,"Time"],[ylabel,"Acceleration"],[legend,"Acceleration"]);

Maxima encountered a Lisp error:

 The value

   "Postion"

 is not of type

   LIST

Automatically continuing.

To enable the Lisp debugger set *debugger-hook* to nil.

If I remove the [legend,"Position"] then it works. The "Position" is a string, not a list. This applies to the velocity and acceleration graphs too

[gunterkoenigsmann]

(Edit: Markdown that makes drag-and-drop into wxMaxima easier).

I get a different error message as I don't know the values for t0, t8 etc. ...but I found a minimal example for reproducing that error:

plot2d(sin(t),[t,0,8],[legend,"Postion"]);

Will ask the maxima-discuss list if they know what is amiss.

[gunterkoenigsmann]

They found the bug, but fixing it has introduced another bug. Seems like the real solution will need one or two days of time.

[pnachtwey]

No hurry. I was just updating my programs. This is an old file
https://deltamotion.com/peter/wxMaxima/Seg1234567.wxmx
You can see it did work long ago. Now you have the numbers.

[gunterkoenigsmann]

I believe that the problem has now been solved by the maxima team. Thanks a lot for reporting it. Normally I would now ask you if you are using MS Windows and, if yes, would tell you that at https://wolfgang.dautermann.at/maxima/nightlybuild/ you'll find an installer with all the problems fixed. But currently I am not sure if "copy as bitmap" works in that installer so your mileage with that installer might vary.

[pnachtwey]

I have Windows. I will test it now. I tested wxmaxima.exe in maxima-current on Windows 11. oops, I got this error (%i1) wxplot2d(pva(t)[1],[t,t0,t8],[xlabel,"Time"],[ylabel,"Position"],[legend,"Position"]); wxplot2d(pva(t)[2],[t,t0,t8],[xlabel,"Time"],[ylabel,"Velocity"],[legend,"Velocity"]); wxplot2d(pva(t)[3],[t,t0,t8],[xlabel,"Time"],[ylabel,"Acceleration"],[legend,"Acceleration"]) ; plotting: range must be of the form [variable, min, max]; found: [t,t0,t8]

…

-- an error. To debug this try: debugmode(true); I have the range correct but I got an error BTW, I have an Intel Mac Book Pro. I run wxMaxima using brew. I have a Raspberry Pi. It runs wxMaxima. I have a Linux Mint Debian Edition.

On Wed, Oct 11, 2023 at 10:00 PM Gunter Königsman ***@***.***> wrote: I believe that the problem has now been solved by the maxima team. Thanks a lot for reporting it. Normally I would now ask you if you are using MS Windows and, if yes, would tell you that at https://wolfgang.dautermann.at/maxima/nightlybuild/ you'll find an installer with all the problems fixed. But currently I am not sure if "copy as bitmap" works in that installer so your mileage with that installer might vary. — Reply to this email directly, view it on GitHub <#1814 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEPAPKF72FE45G6P3GNCFYLX652PHANCNFSM6AAAAAA5STR2DA> . You are receiving this because you authored the thread.Message ID: <wxMaxima-developers/wxmaxima/repo-discussions/1814/comments/7259423@ github.com>

[gunterkoenigsmann]

That error message indicates that Maxima believes that t0 and t8 haven't been assigned a value to before trying to plot. Might that somehow be the case?