lemelinm

1410 Reputation

13 Badges

14 years, 180 days

 

 

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Mario Lemelin
Maple 14.00 Win 7 64 bits
Maple 14.00 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

MaplePrimes Activity


These are answers submitted by lemelinm

 I added "/home/myname" and it's Ok.  Thank you Joe.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 I knew that in 2D input, if you want to write 2_ , you need to write the backslash before 2\_  .  But this one use, not.

Thank you Alejandro and Joe.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987
 Am I reading correctly?  I see that numpoints is 
numpoints=10\000

Witch in 1D input give
>10\1000;
          1000
while in 2D input, I receive the error message
>10\1000);
Error, invalid input: `minus` received 10, which is not valid for its 1st argument, s1

Can you explain why, in 1D input, you write 10\1000 instead of simply 1000?  When I use 1000,
the plot appears with no error message.
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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 in the beta site.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 and it's still the same error message.  I didn't have the opportunity to try it under XP yet.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 mean what I wrote in the first post.

I always create a file in wich I write the activation code of Maple product that I have.  And then I name it "MapleActivation.txt".  I have others files in that location.  For example, I have a file call "liste.txt".  I do :

ssystem("gedit /Documents/ZipLinux/liste.txt")

and the window open but it's empty.  Any clues?

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

do the commands of Robert that I have copy and paste.   I receive this message:

                        / 2    2       2    2       2    2    \
             expr := max\x  + y  - 1, y  + z  - 1, z  + x  - 1/
Error, invalid input: `minus` received 10, which is not valid for its 1st argument, s1

@Doug: Thank you!  Now I realise what I was doing.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 when I want to plot the 3 cylinders


> x^2+y^2 = 1:
> x^2+z^2 = 1:
> y^2+z^2 = 1:
> p1 := plot3d([x, y, sqrt(1-y^2)], x = -1 .. 1, y = -sqrt(1-x^2) .. sqrt(1-x^2));
> p2 := plot3d([z, x, sqrt(1-x^2)], z = -1 .. 1, x = -sqrt(1-z^2) .. sqrt(1-z^2));
> p3 := plot3d([y, z, sqrt(1-z^2)], y = -1 .. 1, z = -sqrt(1-y^2) .. sqrt(1-y^2));
> plots:-display([p1, p2, p3], axes = boxed);

Only p1 appears.  But if I plot them one by one, they are all ok???????

By the way, Joe and Robert commands doesn't work.  Is there a package to load.  I copy and paste the codes in Maple without changing anything.
 

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

That's interesting.  I am trying this command in Maple 13:

ssystem("gedit /Documents/ZipLinux/Maple13Activation.txt")

The window of gedit open with the file name Maple13Activation.txt but the text is not there.  It's suppose to show the activation code of my copy of Maple.

Any suggestions?

 

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987
 > plotPH := phaseportrait(sys, [x(t), y(t)], t = 0 .. 5, [[x(0) = 1, y(0) = -1],
 [x(0) = -1, y(0) = 1]], arrows = large, x = -2 .. 5, y = -2 .. 5, linecolor = blue);
> display([plotPP, plotEQ, plotPH]);

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

The first time I have installed under Linux, it install itself by default in the root.  But later on I realise that it was always problematic to acces files.

So I decided to install it at /usr/local/maple 13 wich is the way most softwares does.  To be able to activate, you need to install it this way:

In a terminal, go to the path where the *.bin file is.  Then type

sudo bash ./Maple13Linux32Installer.bin

The graphic installation will start.  Then select the path /usr/local/   (Maple 13 will be already written)

Since you did it with sudo, you will have the right to activate Maple.  At the end, click on Done, you will see in a few seconds that the process will end in the terminal.  Then exit.

After the installation on this path, I nerver had any difficulties to acces files.  Since then, I have remove the Maple installation in the root.

That's my own experience.  I am sure that not everybody will agree on this but I am always happy to heard others comments.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 Look at the top of Maple, in the toolbars, at the right of the bug, you will see the button with the round arrow.  That's the restart button.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 the great effort that Maplesoft is putting in Maple.  My comment doesn't detract  from nor lessen your merit at all.  I am always suprise to see, in programming, how, sometines, simple thing are hard to program.

As for the document mode, I admit that when it come to program with large modules and procedures, I do it in a text editor first before copying it in Maple.  But for the rest, I really appreciate the document mode.  And as I said, it's my humble opinion.

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 After executing:

ohthehumanity := dsolve({ics, xeq, yeq}, numeric, [y(t), x(t)], output = listprocedure);

I receive this message:

"Warning, The use of global variables in numerical ODE problems is deprecated, and will be removed in a future release. Use the


'parameters' argument instead (see ?dsolve,numeric,parameters).

and ?dsolve,numeric,parameters lead to "No match found"

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

I always work in Document mode and think that this way, the worksheet is more clear than a succession of lines of commands.

As to enter a fraction, the simplest way is to write first the two round bracket (), then press once on the left arrow.  You are between the two bracket and can start to write your expression.

Of course, il would be a plus if they were a shortcut on the keyboard.  Moreover, in the "Fenced" palette, you have to click on the left bracket, write your expression and then click on the right bracket.  My suggestion is that it should be set up in a way that when you click a bracket, the pair is automatically insert in the worksheet.   Then press once on the left arrow and voila!

For a new user, we should help him to do things in Document mode since this is the path that Maple decided to pursue since Maple 9.  I admit that it is not perfect yet, for example, I am stunt ot see that the following still produce an error in Maple 13 in Document mode (but not in worksheet mode):

f:=x -> if x=0 then 0 else 1 end if:

Erro, invalid arrow procedure

Humbly,

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Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

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