Garbage names in the cas vars menu

Garbage names in the cas vars menu - Printable Version

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Garbage names in the cas vars menu - rombva - 10-23-2019 02:26 PM

I wrote the program for the cas mode.

Code:

#cas

zf74(X,Y,γ,a,b):=

BEGIN

LOCAL f,v;

PRINT("---------------------------------");

PRINT("W#7, P#4:");

γ:=unapply(γ,x);

X:=unapply(X,{x,y});

Y:=unapply(Y,{x,y});

f:=expand(simplify(subst(X(x,y)+Y(x,y)*diff(γ(x),x),y=γ(x))));

PRINT("f(x)="+f+";");

PRINT("F(x)="+expand(simplify(∫(f,x)))+";");

v:=∫(f,x,a[1],b[1]);

PRINT(suppress("∫(f(x)"," ")+", x, "+a[1]+", "+b[1]+")="+v+when(FP(v)≠0,"="+ROUND(v,4),"")+";");

PRINT("---------------------------------");

1;

END;

#end

After a lot of runs in the CAS Vars menu the garbage or/and empty-names variables appear. This issue happens while running my other cas programs.

Command line:
[Image: 7rd27zF9FJ.png]

Before running:
[Image: v51afl7w10.png]

After running:
[Image: F3A2wTINS4.png]

CAS Vars mem:
[Image: Bywhn1K4cc.png]

RE: Garbage names in the cas vars menu - Tim Wessman - 10-24-2019 07:04 AM

This on a calculator, emulator, etc?

RE: Garbage names in the cas vars menu - rombva - 10-24-2019 09:39 AM

(10-24-2019 07:04 AM)Tim Wessman Wrote: This on a calculator, emulator, etc?

On a calculator (G2) and emulators (Win10, Android). Sometimes the run returns the input line without showing a terminal window.

RE: Garbage names in the cas vars menu - Tim Wessman - 10-24-2019 10:06 AM

I'd like to try and reproduce, but you have conveniently hidden your inputs in the screenshot. Smile

I see: zf74(2*x-y,-x*y,<--hidden by box---->,[2,8])

Can you copy the command line of your run in? Thanks. Also, give it a whirl on the latest 1.5.0 CAS version if you want.

RE: Garbage names in the cas vars menu - rombva - 10-24-2019 10:23 AM

(10-24-2019 10:06 AM)Tim Wessman Wrote: I'd like to try and reproduce, but you have conveniently hidden your inputs in the screenshot. I see: zf74(2*x-y,-x*y,<--hidden by box---->,[2,8])

Can you copy the command line of your run in? Thanks. Also, give it a whirl on the latest 1.5.0 CAS version if you want.

Sorry. Command line: zf74(2*x-y,-x*y,2*x^2,[0,0],[2,8]).

RE: Garbage names in the cas vars menu - rombva - 10-24-2019 10:46 AM

(10-24-2019 10:06 AM)Tim Wessman Wrote: ...

Can you copy the command line of your run in? Thanks. Also, give it a whirl on the latest 1.5.0 CAS version if you want.

On the beta emu (Windows, x64):

Run 01:
[Image: T89z58ITKC.png]

Run 02:

Run 03:

Run 04:

Run 05:

Run 06:

Run 07:

Run 08:

Run 09:

Run 10:

RE: Garbage names in the cas vars menu - Tim Wessman - 10-24-2019 01:19 PM

Thanks! Will investigate....

RE: Garbage names in the cas vars menu - FrankP - 10-24-2019 09:58 PM

On my Android Emu changing "∫" to "int" in line

PHP Code:

// v:=∫(f,x,a[1],b[1]);
v:=int(f,x,a[1],b[1]); 

avoided mem garbage generation. Maybe helps also in your case?

RE: Garbage names in the cas vars menu - compsystems - 10-24-2019 10:41 PM

This error also happened in XCAS see discussion

https://xcas.univ-grenoble-alpes.fr/forum/viewtopic.php?f=19&t=2112&p=10423&hilit=file#p10348

RE: Garbage names in the cas vars menu - rombva - 10-25-2019 03:41 AM

(10-24-2019 09:58 PM)FrankP Wrote: On my Android Emu changing "∫" to "int" in line

PHP Code:

// v:=∫(f,x,a[1],b[1]); v:=int(f,x,a[1],b[1]);
avoided mem garbage generation. Maybe helps also in your case?

That's right, thanks.

But after running the program in the cas vars menu the x variable with assumption of integration boundaries appears.

[Image: 7aIhL3J8yZ.png]

RE: Garbage names in the cas vars menu - parisse - 10-25-2019 06:00 AM

That's expected, because x is not declared as a local variable (add purge(x) after declaration to keep it symbolic).

RE: Garbage names in the cas vars menu - rombva - 10-25-2019 08:47 AM

(10-25-2019 06:00 AM)parisse Wrote: That's expected, because x is not declared as a local variable (add purge(x) after declaration to keep it symbolic).

Thanks!

RE: Garbage names in the cas vars menu - Tim Wessman - 10-28-2019 01:30 AM

(10-25-2019 08:47 AM)rombva Wrote:
(10-25-2019 06:00 AM)parisse Wrote: That's expected, because x is not declared as a local variable (add purge(x) after declaration to keep it symbolic).

Thanks!

So just to clarify, when you changed to "int(...)" the problem basically when away? (letting us focus on the ∫(...) path exclusively to track it down)

RE: Garbage names in the cas vars menu - rombva - 10-28-2019 05:30 AM

(10-28-2019 01:30 AM)Tim Wessman Wrote:
(10-25-2019 08:47 AM)rombva Wrote: Thanks!

So just to clarify, when you changed to "int(...)" the problem basically when away? (letting us focus on the ∫(...) path exclusively to track it down)

Replacing the ∫(...) by the int(...) removed the garbage names genartion in my all cas programms.